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User style collection editor for GridTableStylesCollection

P: n/a
Dear all ..

If I want to use develop a user control and declare a public property which
the type is System.Windows.Forms.GridTableStylesCollection

For example :

Public Class LookAndView
Inherits System.Windows.Forms.UserControl
Private _Collection As GridTableStylesCollection
Public Property Styles() As
System.Windows.Forms.GridTableStylesCollection
Get
Return _Collection
End Get
Set(ByVal Value As System.Windows.Forms.GridTableStylesCollection)
_Collection = Value
End Set
End Property
emd class

I want the properties Styles can edit in style collection editor during in
design mode. However, I find there some problem :
1. Styles property show empty / nothing (I know the normal case is show
collection)
2. When I click new in style collection editor and input some value into
properites. And then I click ok. During open the style collection editor.
the member side still nothing.
Can any one help me to solve this problem ?
Thanks for your help
Michael VB developer
Nov 21 '05 #1
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4 Replies


P: n/a
I am working a very similar project and am running into an issue getting the
values to save during design time. Perhaps we can share notes?

If anyone else has any ideas where I am going wrong, please let me know.
Thanks.

Here is what I have:

<Serializable(), _
ToolboxItem(True), _
TypeConverter(GetType(DatatableManager.DatatableMa nagerTypeConverter))> _
Public Class DatatableManager
Inherits System.ComponentModel.Component

#Region " Declarations"
Private m_AllowSorting As Boolean = False
Private m_AlternatingBackColor As Color = System.Drawing.Color.White
Private m_BackColor As Color = System.Drawing.Color.White
Private m_ColumnHeadersVisible As Boolean = True
Private m_ForeColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Win dowText)
Private m_GridLineColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Con trol)
Private m_GridLineStyle As DataGridLineStyle
Private m_HeaderBackColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Con trol)
Private m_HeaderFont As Font = New Font("Microsoft Sans Serif", 8.25)
Private m_HeaderForeColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Con trolText)
Private m_LinkColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Hot Track)
Private m_MappingName As String = ""
Private m_PreferredColumnWidth As Integer = 75
Private m_PreferredRowHeight As Integer = 16
Private m_ReadOnly As Boolean = False
Private m_RowHeadersVisible As Boolean = True
Private m_RowHeaderWidth As Integer = 35
Private m_SelectionBackColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Act iveCaption)
Private m_SelectionForeColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Act iveCaptionText)
Private m_Columns As Columns
#End Region

#Region " Component Designer generated code "

Public Sub New(ByVal Container As System.ComponentModel.IContainer)
MyClass.New()

'Required for Windows.Forms Class Composition Designer support
Container.Add(Me)
m_Columns = New Columns
End Sub

Public Sub New()
MyBase.New()

'This call is required by the Component Designer.
InitializeComponent()

'Add any initialization after the InitializeComponent() call
End Sub

'Component overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub

'Required by the Component Designer
Private components As System.ComponentModel.IContainer

'NOTE: The following procedure is required by the Component Designer
'It can be modified using the Component Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
components = New System.ComponentModel.Container
End Sub

#End Region

#Region " Properties"

<Description("Indicates whether sorting is allowed on the grid table when
this DataGridTableStyle is used."), _
Category("Usability")> _
Public Property AllowSorting() As Boolean
Get
Return m_AllowSorting
End Get
Set(ByVal Value As Boolean)
m_AllowSorting = Value
End Set
End Property
<Description("Gets or sets the background color of odd-numbered rows of
the grid."), _
Category("Appearance")> _
Public Property AlternatingBackColor() As Color
Get
Return m_AlternatingBackColor
End Get
Set(ByVal Value As Color)
m_AlternatingBackColor = Value
End Set
End Property
<Description("Gets or sets the background color of even-numbered rows of
the grid."), _
Category("Appearance")> _
Public Property BackColor() As Color
Get
Return m_BackColor
End Get
Set(ByVal Value As Color)
m_BackColor = Value
End Set
End Property
<Description("Gets or sets a value indicating whether column headers are
visible."), _
Category("Appearance")> _
Public Property ColumnHeadersVisible() As Boolean
Get
Return m_ColumnHeadersVisible
End Get
Set(ByVal Value As Boolean)
m_ColumnHeadersVisible = Value
End Set
End Property
<Description("Gets or sets the foreground color of the grid table."), _
Category("Appearance"), _
DefaultValue(True)> _
Public Property ForeColor() As Color
Get
Return m_ForeColor
End Get
Set(ByVal Value As Color)
m_ForeColor = Value
End Set
End Property
<Description("Gets or sets the color of grid lines."), _
Category("Appearance")> _
Public Property GridLineColor() As Color
Get
Return m_GridLineColor
End Get
Set(ByVal Value As Color)
m_GridLineColor = Value
End Set
End Property
<Description("Gets or sets the style of grid lines."), _
Category("Appearance")> _
Public Property GridLineStyle() As DataGridLineStyle
Get
Return m_GridLineStyle
End Get
Set(ByVal Value As DataGridLineStyle)
m_GridLineStyle = Value
End Set
End Property
<Description("Gets or sets the background color of headers."), _
Category("Appearance")> _
Public Property HeaderBackColor() As Color
Get
Return m_HeaderBackColor
End Get
Set(ByVal Value As Color)
m_HeaderBackColor = Value
End Set
End Property
<Description("Gets or sets the font used for header captions."), _
Category("Appearance")> _
Public Property HeaderFont() As Font
Get
Return m_HeaderFont
End Get
Set(ByVal Value As Font)
m_HeaderFont = Value
End Set
End Property
<Description("Gets or sets the foreground color of headers."), _
Category("Appearance")> _
Public Property HeaderForeColor() As Color
Get
Return m_HeaderForeColor
End Get
Set(ByVal Value As Color)
m_HeaderForeColor = Value
End Set
End Property
<Description("Gets or sets the color of link text."), _
Category("Appearance")> _
Public Property LinkColor() As Color
Get
Return m_LinkColor
End Get
Set(ByVal Value As Color)
m_LinkColor = Value
End Set
End Property
<Description("Gets or sets the name used to map this table to a specific
data source."), _
Category("General")> _
Public Property MappingName() As String
Get
Return m_MappingName
End Get
Set(ByVal Value As String)
m_MappingName = Value
End Set
End Property
<Description("Gets or sets the width used to create columns when a new
grid is displayed."), _
Category("General")> _
Public Property PreferredColumnWidth() As Integer
Get
Return m_PreferredColumnWidth
End Get
Set(ByVal Value As Integer)
m_PreferredColumnWidth = Value
End Set
End Property
<Description("Gets or sets the height used to create a row when a new grid
is displayed."), _
Category("Appearance")> _
Public Property PreferredRowHeight() As Integer
Get
Return m_PreferredRowHeight
End Get
Set(ByVal Value As Integer)
m_PreferredRowHeight = Value
End Set
End Property
<Description("Gets or sets a value indicating whether columns can be
edited."), _
Category("Usability")> _
Public Property [ReadOnly]() As Boolean
Get
Return m_ReadOnly
End Get
Set(ByVal Value As Boolean)
m_ReadOnly = Value
End Set
End Property
<Description("Gets or sets a value indicating whether row headers are
visible."), _
Category("Appearance")> _
Public Property RowHeadersVisible() As Boolean
Get
Return m_RowHeadersVisible
End Get
Set(ByVal Value As Boolean)
m_RowHeadersVisible = Value
End Set
End Property
<Description("Gets or sets the width of row headers."), _
Category("Appearance")> _
Public Property RowHeaderWidth() As Integer
Get
Return m_RowHeaderWidth
End Get
Set(ByVal Value As Integer)
m_RowHeaderWidth = Value
End Set
End Property
<Description("Gets or sets the background color of selected cells."), _
Category("Appearance")> _
Public Property SelectionBackColor() As Color
Get
Return m_SelectionBackColor
End Get
Set(ByVal Value As Color)
m_SelectionBackColor = Value
End Set
End Property
<Description("Gets or sets the foreground color of selected cells."), _
Category("Appearance")> _
Public Property SelectionForeColor() As Color
Get
Return m_SelectionForeColor
End Get
Set(ByVal Value As Color)
m_SelectionForeColor = Value
End Set
End Property
<Description("Gets or sets the collection of columns available for display
in the datagrid."), _
Category("Data"), _
DesignerSerializationVisibility(DesignerSerializat ionVisibility.Content),
_
Editor(GetType(ColumnCollectionEditor), GetType(UITypeEditor))> _
Public Property Columns() As Columns
Get
Return m_Columns
End Get
Set(ByVal Value As Columns)
m_Columns = Value
End Set
End Property

#End Region

Friend Class DatatableManagerTypeConverter
Inherits ExpandableObjectConverter

Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Return String.Format("Data table manager")
End Function

Public Overloads Function CanConvertFrom(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal sourceType As
System.Type) As Boolean

If (sourceType Is GetType(String)) Then
Return True
End If

Return MyBase.CanConvertFrom(context, sourceType)

End Function
End Class

Friend Class DatatableManagerDesigner
Inherits System.Windows.Forms.Design.ControlDesigner

Private MyControl As DatatableManager

Public Overrides Sub Initialize(ByVal component As IComponent)

Try
MyBase.Initialize(component)

'// Record instance of control we're designing
MyControl = DirectCast(component, DatatableManager)

'// Hook up events
Dim s As ISelectionService =
DirectCast(GetService(GetType(ISelectionService)), ISelectionService)
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)
AddHandler s.SelectionChanged, New EventHandler(AddressOf
OnSelectionChanged)
AddHandler c.ComponentRemoving, New ComponentEventHandler(AddressOf
OnComponentRemoving)
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try
End Sub

Private Sub OnSelectionChanged(ByVal sender As Object, ByVal e As
System.EventArgs)

'MyControl.OnSelectionChanged()

End Sub

Private Sub OnComponentRemoving(ByVal sender As Object, ByVal e As
ComponentEventArgs)

Try
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)
Dim bc As BaseColumn
Dim h As IDesignerHost =
DirectCast(GetService(GetType(IDesignerHost)), IDesignerHost)

'// If the user is removing a button
If (TypeOf e.Component Is BaseColumn) Then

bc = DirectCast(e.Component, BaseColumn)
If (MyControl.Columns.Contains(bc)) Then

c.OnComponentChanging(MyControl, Nothing)
MyControl.Columns.Remove(bc)
c.OnComponentChanged(MyControl, Nothing, Nothing, Nothing)
Return
End If
End If

'// If the user is removing the control itself
If (e.Component Is MyControl) Then

For i As Int32 = MyControl.Columns.Count - 1 To 0 Step -1

bc = MyControl.Columns(i)
c.OnComponentChanging(MyControl, Nothing)
MyControl.Columns.Remove(bc)
h.DestroyComponent(bc)
c.OnComponentChanged(MyControl, Nothing, Nothing, Nothing)
Next i

End If
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try
End Sub

Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)

Try
Dim s As ISelectionService =
DirectCast(GetService(GetType(ISelectionService)), ISelectionService)
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)

'// Unhook events
RemoveHandler s.SelectionChanged, New EventHandler(AddressOf
OnSelectionChanged)
RemoveHandler c.ComponentRemoving, New
ComponentEventHandler(AddressOf OnComponentRemoving)
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

MyBase.Dispose(disposing)

End Sub

Public Overrides ReadOnly Property AssociatedComponents() As
System.Collections.ICollection
Get

Try
Return MyControl.Columns
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

End Get
End Property

Public Overrides ReadOnly Property Verbs() As
System.ComponentModel.Design.DesignerVerbCollectio n

Get

Try
Dim v As DesignerVerbCollection = New DesignerVerbCollection

'// Verb to add buttons
v.Add(New DesignerVerb("&Add Column", New EventHandler(AddressOf
OnAddButton)))

Return v
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

End Get

End Property

Private Sub OnAddButton(ByVal sender As Object, ByVal e As
System.EventArgs)

Try
Dim bc As BaseColumn
Dim h As IDesignerHost =
DirectCast(GetService(GetType(IDesignerHost)), IDesignerHost)
Dim dt As DesignerTransaction
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)

'// Add a new button to the collection
dt = h.CreateTransaction("Add Column")
bc = DirectCast(h.CreateComponent(GetType(BaseColumn)), BaseColumn)
c.OnComponentChanging(MyControl, Nothing)
MyControl.Columns.Add(bc)
c.OnComponentChanged(MyControl, Nothing, Nothing, Nothing)
dt.Commit()
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

End Sub

End Class
End Class

#Region " Column Collection "

'<TypeConverter(GetType(Columns.ColumnsTypeConvert er))>

Public Class Columns
Inherits CollectionBase

Event PropertyChaged()

'<DesignerSerializationVisibility(DesignerSerializ ationVisibility.Content)>

Default Public Property Item(ByVal index As Integer) As BaseColumn
Get
Try
Return CType(List(index), BaseColumn)
Catch ex As Exception
Return Nothing
End Try
End Get
Set(ByVal Value As BaseColumn)
List(index) = Value
End Set
End Property

Public Function Add(ByVal value As BaseColumn) As Integer
Return List.Add(value)
value.Collection = Me
End Function 'Add

Public Sub AddRange(ByVal Items() As BaseColumn)
Dim Item As Object
For Each Item In Items
CType(Item, BaseColumn).Collection = Me
list.Add(Item)
Next
End Sub

Public Function IndexOf(ByVal value As BaseColumn) As Integer
Return List.IndexOf(value)
End Function 'IndexOf

Public Sub Insert(ByVal index As Integer, ByVal value As BaseColumn)
List.Insert(index, value)
End Sub 'Insert

Public Sub Remove(ByVal value As BaseColumn)
List.Remove(value)

End Sub 'Remove

Public Function Contains(ByVal value As BaseColumn) As Boolean
' If value is not of type BaseColumn, this will return false.
Return List.Contains(value)
End Function 'Contains

Protected Shadows Sub OnInsert(ByVal index As Integer, ByVal value As
BaseColumn)
' Insert additional code to be run only when inserting values.
End Sub 'OnInsert

Protected Shadows Sub OnRemove(ByVal index As Integer, ByVal value As
BaseColumn)
' Insert additional code to be run only when removing values.
End Sub 'OnRemove

Protected Shadows Sub OnSet(ByVal index As Integer, ByVal oldValue As
BaseColumn, ByVal newValue As BaseColumn)
' Insert additional code to be run only when setting values.
End Sub 'OnSet

Protected Shadows Sub OnValidate(ByVal value As BaseColumn)
'If Not value.GetType() Is Type.GetType("BaseColumn") Then
'Throw New ArgumentException("value must be of type BaseColumn.",
"value")
'End If
End Sub 'OnValidate

Friend Sub RaisePropertyChangedEvent()
RaiseEvent PropertyChaged()
End Sub

Friend Class ColumnsTypeConverter
Inherits ExpandableObjectConverter

Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Return String.Format("Collection")
End Function

Public Overloads Function CanConvertFrom(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal sourceType As
System.Type) As Boolean

If (sourceType Is GetType(String)) Then
Return True
End If

Return MyBase.CanConvertFrom(context, sourceType)

End Function
End Class

End Class

#Region " ColumnCollectionEditor"

Friend Class ColumnCollectionEditor
Inherits System.ComponentModel.Design.CollectionEditor

Private Types() As System.Type
Private cf As CollectionForm

Sub New(ByVal type As System.Type)
MyBase.New(type)
Types = New System.Type() {GetType(BaseColumn), GetType(TextColumn),
GetType(CheckColumn)}
End Sub

Protected Overrides Function CreateNewItemTypes() As System.Type()
Return Types
End Function

Protected Overrides Function CreateCollectionForm() As
System.ComponentModel.Design.CollectionEditor.Coll ectionForm
Me.cf = MyBase.CreateCollectionForm
Return Me.cf
End Function

Protected Overloads Overrides Function CreateInstance(ByVal itemType As
System.Type) As Object

Dim blahblah As BaseColumn = DirectCast(MyBase.CreateInstance(itemType),
BaseColumn)

If Not Me.Context.Instance Is Nothing Then
End If

Return blahblah

End Function

End Class

#End Region

#Region " Columns Types"

<Serializable(), TypeConverter(GetType(BaseColumn.BaseColumnConvert er))> _
Public Class BaseColumn
Inherits Component

Public Enum ColumnTypes
Base = 1
Text = 2
Bool = 3
End Enum

#Region " Declarations "

Protected m_Alignment As System.Windows.Forms.HorizontalAlignment
Protected m_HeaderText As String
Protected m_MappingName As String
Protected m_NullText As String
Protected m_ReadOnly As Boolean
Protected m_Width As Integer
Protected m_Visible As Boolean
Protected m_Collection As Columns
Protected m_ColumnType As ColumnTypes

#End Region

#Region " Properties"

<Description("Gets or sets the alignment of text in a column."), _
Category("General"), _
DefaultValue(System.Windows.Forms.HorizontalAlignm ent.Left)> _
Public Property Alignment() As System.Windows.Forms.HorizontalAlignment
Get
Return m_Alignment
End Get
Set(ByVal Value As System.Windows.Forms.HorizontalAlignment)
m_Alignment = Value
End Set
End Property

<Description("Gets or sets the text of the column header."), _
Category("General"), _
DefaultValue("")> _
Public Property HeaderText() As String
Get
Return m_HeaderText
End Get
Set(ByVal Value As String)
m_HeaderText = Value
End Set
End Property

<Description("Gets or sets the name used to map the column style to a data
member."), _
Category("General"), _
DefaultValue("")> _
Public Property MappingName() As String
Get
Return m_MappingName
End Get
Set(ByVal Value As String)
m_MappingName = Value
End Set
End Property

<Description("Gets or sets the text that is displayed when the column
contains a null reference (Nothing in Visual Basic)."), _
Category("General"), _
DefaultValue("")> _
Public Property NullText() As String
Get
Return m_NullText
End Get
Set(ByVal Value As String)
m_NullText = Value
End Set
End Property

<Description("Gets or sets a value indicating whether the data in the
column can be edited."), _
Category("General"), _
DefaultValue(True)> _
Public Property [ReadOnly]() As Boolean
Get
Return m_ReadOnly
End Get
Set(ByVal Value As Boolean)
m_ReadOnly = Value
End Set
End Property

<Description("Gets or sets the width of the column."), _
Category("General"), _
DefaultValue(50)> _
Public Property Width() As Integer
Get
Return m_Width
End Get
Set(ByVal Value As Integer)
m_Width = Value
End Set
End Property

<Description("Gets or sets weather the column should be displayed in the
datagrid."), _
Category("General"), _
DefaultValue(True)> _
Public Property Visible() As Boolean
Get
Return m_Visible
End Get
Set(ByVal Value As Boolean)
m_Visible = Value
End Set
End Property

Public WriteOnly Property Collection() As Columns
Set(ByVal Value As Columns)
m_Collection = Value
End Set
End Property

<Browsable(True)> Public ReadOnly Property ColumnType() As ColumnTypes
Get
Return ColumnTypes.Base
End Get
End Property

#End Region

#Region " Methods"

Protected Sub PropertyChanged()
'Check if the collection is a valid object if not during design time you
and up with a message 'Object is not set to an Instance' But Your Program
Works
'By the way I am looking forward for the IsNot operator in VS 2005,
because every time I forget the Not Operator and need to navigate back
If Not m_Collection Is Nothing Then
m_Collection.RaisePropertyChangedEvent()
End If
End Sub

Public Overrides Function ToString() As String
Return m_MappingName
End Function

#End Region

Friend Class BaseColumnConverter
Inherits ExpandableObjectConverter

Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Dim mi As BaseColumn = CType(value, BaseColumn)
Return String.Format("{0}", mi.MappingName)
End Function

Public Overloads Function CanConvertFrom(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal sourceType As
System.Type) As Boolean

If (sourceType Is GetType(String)) Then
Return True
End If

Return MyBase.CanConvertFrom(context, sourceType)

End Function

End Class

End Class

<Serializable(), TypeConverter(GetType(TextColumn.TextColumnConvert er))> _
Public Class TextColumn
Inherits BaseColumn

Private m_Format As String

<Description("Gets or sets the character(s) that specify how text is
formatted."), _
Category("General"), _
DefaultValue("")> _
Public Property Format() As String
Get
Return m_Format
End Get
Set(ByVal Value As String)
m_Format = Value
End Set
End Property

<Browsable(True)> Public Shadows ReadOnly Property ColumnType() As
ColumnTypes
Get
Return ColumnTypes.Text
End Get
End Property

Friend Class TextColumnConverter
Inherits BaseColumn.BaseColumnConverter
Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Dim mi As TextColumn = CType(value, TextColumn)
Return String.Format("{0}", mi.MappingName)
End Function
End Class

End Class

<Serializable(), TypeConverter(GetType(CheckColumn.CheckColumnConve rter))> _
Public Class CheckColumn
Inherits BaseColumn

Protected m_TrueValue As Object
Protected m_FalseValue As Object

<Description("Gets or sets the actual value used when setting the value of
the column to true."), _
Category("General"), _
DefaultValue(False)> _
Public Property TrueValue() As String
Get
Return CType(m_TrueValue, String)
End Get
Set(ByVal Value As String)
m_TrueValue = Value
End Set
End Property

<Description("Gets or sets the actual value used when setting the value of
the column to false."), _
Category("General"), _
DefaultValue(False)> _
Public Property FalseValue() As String
Get
Return CType(m_FalseValue, String)
End Get
Set(ByVal Value As String)
m_FalseValue = Value
End Set
End Property

<Browsable(True)> Public Shadows ReadOnly Property ColumnType() As
ColumnTypes
Get
Return ColumnTypes.Bool
End Get
End Property

Friend Class CheckColumnConverter
Inherits BaseColumn.BaseColumnConverter
Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Dim mi As CheckColumn = CType(value, CheckColumn)
Return String.Format("{0}", mi.MappingName)
End Function
End Class

End Class

#End Region

#End Region
"Michael" <la********@gmail.com> wrote in message
news:%2****************@TK2MSFTNGP10.phx.gbl...
Dear all ..

If I want to use develop a user control and declare a public property
which the type is System.Windows.Forms.GridTableStylesCollection

For example :

Public Class LookAndView
Inherits System.Windows.Forms.UserControl
Private _Collection As GridTableStylesCollection
Public Property Styles() As
System.Windows.Forms.GridTableStylesCollection
Get
Return _Collection
End Get
Set(ByVal Value As System.Windows.Forms.GridTableStylesCollection)
_Collection = Value
End Set
End Property
emd class

I want the properties Styles can edit in style collection editor during
in design mode. However, I find there some problem :
1. Styles property show empty / nothing (I know the normal case is show
collection)
2. When I click new in style collection editor and input some value into
properites. And then I click ok. During open the style collection editor.
the member side still nothing.
Can any one help me to solve this problem ?
Thanks for your help
Michael VB developer

Nov 21 '05 #2

P: n/a
Thanks AMDRIT ..

Thank for your help .....very much
I get it and solve this problem

Michael

"AMDRIT" <am****@hotmail.com> 秎ン
news:et**************@TK2MSFTNGP09.phx.gbl い级糶...
I am working a very similar project and am running into an issue getting the values to save during design time. Perhaps we can share notes?

If anyone else has any ideas where I am going wrong, please let me know.
Thanks.

Here is what I have:

<Serializable(), _
ToolboxItem(True), _
TypeConverter(GetType(DatatableManager.DatatableMa nagerTypeConverter))> _ Public Class DatatableManager
Inherits System.ComponentModel.Component

#Region " Declarations"
Private m_AllowSorting As Boolean = False
Private m_AlternatingBackColor As Color = System.Drawing.Color.White
Private m_BackColor As Color = System.Drawing.Color.White
Private m_ColumnHeadersVisible As Boolean = True
Private m_ForeColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Win dowText)
Private m_GridLineColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Con trol)
Private m_GridLineStyle As DataGridLineStyle
Private m_HeaderBackColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Con trol)
Private m_HeaderFont As Font = New Font("Microsoft Sans Serif", 8.25)
Private m_HeaderForeColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Con trolText)
Private m_LinkColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Hot Track)
Private m_MappingName As String = ""
Private m_PreferredColumnWidth As Integer = 75
Private m_PreferredRowHeight As Integer = 16
Private m_ReadOnly As Boolean = False
Private m_RowHeadersVisible As Boolean = True
Private m_RowHeaderWidth As Integer = 35
Private m_SelectionBackColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Act iveCaption)
Private m_SelectionForeColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Act iveCaptionText)
Private m_Columns As Columns
#End Region

#Region " Component Designer generated code "

Public Sub New(ByVal Container As System.ComponentModel.IContainer)
MyClass.New()

'Required for Windows.Forms Class Composition Designer support
Container.Add(Me)
m_Columns = New Columns
End Sub

Public Sub New()
MyBase.New()

'This call is required by the Component Designer.
InitializeComponent()

'Add any initialization after the InitializeComponent() call
End Sub

'Component overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub

'Required by the Component Designer
Private components As System.ComponentModel.IContainer

'NOTE: The following procedure is required by the Component Designer
'It can be modified using the Component Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
components = New System.ComponentModel.Container
End Sub

#End Region

#Region " Properties"

<Description("Indicates whether sorting is allowed on the grid table when this DataGridTableStyle is used."), _
Category("Usability")> _
Public Property AllowSorting() As Boolean
Get
Return m_AllowSorting
End Get
Set(ByVal Value As Boolean)
m_AllowSorting = Value
End Set
End Property
<Description("Gets or sets the background color of odd-numbered rows of
the grid."), _
Category("Appearance")> _
Public Property AlternatingBackColor() As Color
Get
Return m_AlternatingBackColor
End Get
Set(ByVal Value As Color)
m_AlternatingBackColor = Value
End Set
End Property
<Description("Gets or sets the background color of even-numbered rows of
the grid."), _
Category("Appearance")> _
Public Property BackColor() As Color
Get
Return m_BackColor
End Get
Set(ByVal Value As Color)
m_BackColor = Value
End Set
End Property
<Description("Gets or sets a value indicating whether column headers are
visible."), _
Category("Appearance")> _
Public Property ColumnHeadersVisible() As Boolean
Get
Return m_ColumnHeadersVisible
End Get
Set(ByVal Value As Boolean)
m_ColumnHeadersVisible = Value
End Set
End Property
<Description("Gets or sets the foreground color of the grid table."), _
Category("Appearance"), _
DefaultValue(True)> _
Public Property ForeColor() As Color
Get
Return m_ForeColor
End Get
Set(ByVal Value As Color)
m_ForeColor = Value
End Set
End Property
<Description("Gets or sets the color of grid lines."), _
Category("Appearance")> _
Public Property GridLineColor() As Color
Get
Return m_GridLineColor
End Get
Set(ByVal Value As Color)
m_GridLineColor = Value
End Set
End Property
<Description("Gets or sets the style of grid lines."), _
Category("Appearance")> _
Public Property GridLineStyle() As DataGridLineStyle
Get
Return m_GridLineStyle
End Get
Set(ByVal Value As DataGridLineStyle)
m_GridLineStyle = Value
End Set
End Property
<Description("Gets or sets the background color of headers."), _
Category("Appearance")> _
Public Property HeaderBackColor() As Color
Get
Return m_HeaderBackColor
End Get
Set(ByVal Value As Color)
m_HeaderBackColor = Value
End Set
End Property
<Description("Gets or sets the font used for header captions."), _
Category("Appearance")> _
Public Property HeaderFont() As Font
Get
Return m_HeaderFont
End Get
Set(ByVal Value As Font)
m_HeaderFont = Value
End Set
End Property
<Description("Gets or sets the foreground color of headers."), _
Category("Appearance")> _
Public Property HeaderForeColor() As Color
Get
Return m_HeaderForeColor
End Get
Set(ByVal Value As Color)
m_HeaderForeColor = Value
End Set
End Property
<Description("Gets or sets the color of link text."), _
Category("Appearance")> _
Public Property LinkColor() As Color
Get
Return m_LinkColor
End Get
Set(ByVal Value As Color)
m_LinkColor = Value
End Set
End Property
<Description("Gets or sets the name used to map this table to a specific
data source."), _
Category("General")> _
Public Property MappingName() As String
Get
Return m_MappingName
End Get
Set(ByVal Value As String)
m_MappingName = Value
End Set
End Property
<Description("Gets or sets the width used to create columns when a new
grid is displayed."), _
Category("General")> _
Public Property PreferredColumnWidth() As Integer
Get
Return m_PreferredColumnWidth
End Get
Set(ByVal Value As Integer)
m_PreferredColumnWidth = Value
End Set
End Property
<Description("Gets or sets the height used to create a row when a new grid is displayed."), _
Category("Appearance")> _
Public Property PreferredRowHeight() As Integer
Get
Return m_PreferredRowHeight
End Get
Set(ByVal Value As Integer)
m_PreferredRowHeight = Value
End Set
End Property
<Description("Gets or sets a value indicating whether columns can be
edited."), _
Category("Usability")> _
Public Property [ReadOnly]() As Boolean
Get
Return m_ReadOnly
End Get
Set(ByVal Value As Boolean)
m_ReadOnly = Value
End Set
End Property
<Description("Gets or sets a value indicating whether row headers are
visible."), _
Category("Appearance")> _
Public Property RowHeadersVisible() As Boolean
Get
Return m_RowHeadersVisible
End Get
Set(ByVal Value As Boolean)
m_RowHeadersVisible = Value
End Set
End Property
<Description("Gets or sets the width of row headers."), _
Category("Appearance")> _
Public Property RowHeaderWidth() As Integer
Get
Return m_RowHeaderWidth
End Get
Set(ByVal Value As Integer)
m_RowHeaderWidth = Value
End Set
End Property
<Description("Gets or sets the background color of selected cells."), _
Category("Appearance")> _
Public Property SelectionBackColor() As Color
Get
Return m_SelectionBackColor
End Get
Set(ByVal Value As Color)
m_SelectionBackColor = Value
End Set
End Property
<Description("Gets or sets the foreground color of selected cells."), _
Category("Appearance")> _
Public Property SelectionForeColor() As Color
Get
Return m_SelectionForeColor
End Get
Set(ByVal Value As Color)
m_SelectionForeColor = Value
End Set
End Property
<Description("Gets or sets the collection of columns available for display in the datagrid."), _
Category("Data"), _
DesignerSerializationVisibility(DesignerSerializat ionVisibility.Content), _
Editor(GetType(ColumnCollectionEditor), GetType(UITypeEditor))> _
Public Property Columns() As Columns
Get
Return m_Columns
End Get
Set(ByVal Value As Columns)
m_Columns = Value
End Set
End Property

#End Region

Friend Class DatatableManagerTypeConverter
Inherits ExpandableObjectConverter

Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Return String.Format("Data table manager")
End Function

Public Overloads Function CanConvertFrom(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal sourceType As
System.Type) As Boolean

If (sourceType Is GetType(String)) Then
Return True
End If

Return MyBase.CanConvertFrom(context, sourceType)

End Function
End Class

Friend Class DatatableManagerDesigner
Inherits System.Windows.Forms.Design.ControlDesigner

Private MyControl As DatatableManager

Public Overrides Sub Initialize(ByVal component As IComponent)

Try
MyBase.Initialize(component)

'// Record instance of control we're designing
MyControl = DirectCast(component, DatatableManager)

'// Hook up events
Dim s As ISelectionService =
DirectCast(GetService(GetType(ISelectionService)), ISelectionService)
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)
AddHandler s.SelectionChanged, New EventHandler(AddressOf
OnSelectionChanged)
AddHandler c.ComponentRemoving, New ComponentEventHandler(AddressOf OnComponentRemoving)
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try
End Sub

Private Sub OnSelectionChanged(ByVal sender As Object, ByVal e As
System.EventArgs)

'MyControl.OnSelectionChanged()

End Sub

Private Sub OnComponentRemoving(ByVal sender As Object, ByVal e As
ComponentEventArgs)

Try
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)
Dim bc As BaseColumn
Dim h As IDesignerHost =
DirectCast(GetService(GetType(IDesignerHost)), IDesignerHost)

'// If the user is removing a button
If (TypeOf e.Component Is BaseColumn) Then

bc = DirectCast(e.Component, BaseColumn)
If (MyControl.Columns.Contains(bc)) Then

c.OnComponentChanging(MyControl, Nothing)
MyControl.Columns.Remove(bc)
c.OnComponentChanged(MyControl, Nothing, Nothing, Nothing)
Return
End If
End If

'// If the user is removing the control itself
If (e.Component Is MyControl) Then

For i As Int32 = MyControl.Columns.Count - 1 To 0 Step -1

bc = MyControl.Columns(i)
c.OnComponentChanging(MyControl, Nothing)
MyControl.Columns.Remove(bc)
h.DestroyComponent(bc)
c.OnComponentChanged(MyControl, Nothing, Nothing, Nothing)
Next i

End If
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try
End Sub

Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)

Try
Dim s As ISelectionService =
DirectCast(GetService(GetType(ISelectionService)), ISelectionService)
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)

'// Unhook events
RemoveHandler s.SelectionChanged, New EventHandler(AddressOf
OnSelectionChanged)
RemoveHandler c.ComponentRemoving, New
ComponentEventHandler(AddressOf OnComponentRemoving)
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

MyBase.Dispose(disposing)

End Sub

Public Overrides ReadOnly Property AssociatedComponents() As
System.Collections.ICollection
Get

Try
Return MyControl.Columns
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

End Get
End Property

Public Overrides ReadOnly Property Verbs() As
System.ComponentModel.Design.DesignerVerbCollectio n

Get

Try
Dim v As DesignerVerbCollection = New DesignerVerbCollection

'// Verb to add buttons
v.Add(New DesignerVerb("&Add Column", New EventHandler(AddressOf
OnAddButton)))

Return v
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

End Get

End Property

Private Sub OnAddButton(ByVal sender As Object, ByVal e As
System.EventArgs)

Try
Dim bc As BaseColumn
Dim h As IDesignerHost =
DirectCast(GetService(GetType(IDesignerHost)), IDesignerHost)
Dim dt As DesignerTransaction
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)

'// Add a new button to the collection
dt = h.CreateTransaction("Add Column")
bc = DirectCast(h.CreateComponent(GetType(BaseColumn)), BaseColumn) c.OnComponentChanging(MyControl, Nothing)
MyControl.Columns.Add(bc)
c.OnComponentChanged(MyControl, Nothing, Nothing, Nothing)
dt.Commit()
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

End Sub

End Class
End Class

#Region " Column Collection "

'<TypeConverter(GetType(Columns.ColumnsTypeConvert er))>

Public Class Columns
Inherits CollectionBase

Event PropertyChaged()

'<DesignerSerializationVisibility(DesignerSerializ ationVisibility.Content)>
Default Public Property Item(ByVal index As Integer) As BaseColumn
Get
Try
Return CType(List(index), BaseColumn)
Catch ex As Exception
Return Nothing
End Try
End Get
Set(ByVal Value As BaseColumn)
List(index) = Value
End Set
End Property

Public Function Add(ByVal value As BaseColumn) As Integer
Return List.Add(value)
value.Collection = Me
End Function 'Add

Public Sub AddRange(ByVal Items() As BaseColumn)
Dim Item As Object
For Each Item In Items
CType(Item, BaseColumn).Collection = Me
list.Add(Item)
Next
End Sub

Public Function IndexOf(ByVal value As BaseColumn) As Integer
Return List.IndexOf(value)
End Function 'IndexOf

Public Sub Insert(ByVal index As Integer, ByVal value As BaseColumn)
List.Insert(index, value)
End Sub 'Insert

Public Sub Remove(ByVal value As BaseColumn)
List.Remove(value)

End Sub 'Remove

Public Function Contains(ByVal value As BaseColumn) As Boolean
' If value is not of type BaseColumn, this will return false.
Return List.Contains(value)
End Function 'Contains

Protected Shadows Sub OnInsert(ByVal index As Integer, ByVal value As
BaseColumn)
' Insert additional code to be run only when inserting values.
End Sub 'OnInsert

Protected Shadows Sub OnRemove(ByVal index As Integer, ByVal value As
BaseColumn)
' Insert additional code to be run only when removing values.
End Sub 'OnRemove

Protected Shadows Sub OnSet(ByVal index As Integer, ByVal oldValue As
BaseColumn, ByVal newValue As BaseColumn)
' Insert additional code to be run only when setting values.
End Sub 'OnSet

Protected Shadows Sub OnValidate(ByVal value As BaseColumn)
'If Not value.GetType() Is Type.GetType("BaseColumn") Then
'Throw New ArgumentException("value must be of type BaseColumn.",
"value")
'End If
End Sub 'OnValidate

Friend Sub RaisePropertyChangedEvent()
RaiseEvent PropertyChaged()
End Sub

Friend Class ColumnsTypeConverter
Inherits ExpandableObjectConverter

Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Return String.Format("Collection")
End Function

Public Overloads Function CanConvertFrom(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal sourceType As
System.Type) As Boolean

If (sourceType Is GetType(String)) Then
Return True
End If

Return MyBase.CanConvertFrom(context, sourceType)

End Function
End Class

End Class

#Region " ColumnCollectionEditor"

Friend Class ColumnCollectionEditor
Inherits System.ComponentModel.Design.CollectionEditor

Private Types() As System.Type
Private cf As CollectionForm

Sub New(ByVal type As System.Type)
MyBase.New(type)
Types = New System.Type() {GetType(BaseColumn), GetType(TextColumn),
GetType(CheckColumn)}
End Sub

Protected Overrides Function CreateNewItemTypes() As System.Type()
Return Types
End Function

Protected Overrides Function CreateCollectionForm() As
System.ComponentModel.Design.CollectionEditor.Coll ectionForm
Me.cf = MyBase.CreateCollectionForm
Return Me.cf
End Function

Protected Overloads Overrides Function CreateInstance(ByVal itemType As
System.Type) As Object

Dim blahblah As BaseColumn = DirectCast(MyBase.CreateInstance(itemType), BaseColumn)

If Not Me.Context.Instance Is Nothing Then
End If

Return blahblah

End Function

End Class

#End Region

#Region " Columns Types"

<Serializable(), TypeConverter(GetType(BaseColumn.BaseColumnConvert er))> _
Public Class BaseColumn
Inherits Component

Public Enum ColumnTypes
Base = 1
Text = 2
Bool = 3
End Enum

#Region " Declarations "

Protected m_Alignment As System.Windows.Forms.HorizontalAlignment
Protected m_HeaderText As String
Protected m_MappingName As String
Protected m_NullText As String
Protected m_ReadOnly As Boolean
Protected m_Width As Integer
Protected m_Visible As Boolean
Protected m_Collection As Columns
Protected m_ColumnType As ColumnTypes

#End Region

#Region " Properties"

<Description("Gets or sets the alignment of text in a column."), _
Category("General"), _
DefaultValue(System.Windows.Forms.HorizontalAlignm ent.Left)> _
Public Property Alignment() As System.Windows.Forms.HorizontalAlignment
Get
Return m_Alignment
End Get
Set(ByVal Value As System.Windows.Forms.HorizontalAlignment)
m_Alignment = Value
End Set
End Property

<Description("Gets or sets the text of the column header."), _
Category("General"), _
DefaultValue("")> _
Public Property HeaderText() As String
Get
Return m_HeaderText
End Get
Set(ByVal Value As String)
m_HeaderText = Value
End Set
End Property

<Description("Gets or sets the name used to map the column style to a data member."), _
Category("General"), _
DefaultValue("")> _
Public Property MappingName() As String
Get
Return m_MappingName
End Get
Set(ByVal Value As String)
m_MappingName = Value
End Set
End Property

<Description("Gets or sets the text that is displayed when the column
contains a null reference (Nothing in Visual Basic)."), _
Category("General"), _
DefaultValue("")> _
Public Property NullText() As String
Get
Return m_NullText
End Get
Set(ByVal Value As String)
m_NullText = Value
End Set
End Property

<Description("Gets or sets a value indicating whether the data in the
column can be edited."), _
Category("General"), _
DefaultValue(True)> _
Public Property [ReadOnly]() As Boolean
Get
Return m_ReadOnly
End Get
Set(ByVal Value As Boolean)
m_ReadOnly = Value
End Set
End Property

<Description("Gets or sets the width of the column."), _
Category("General"), _
DefaultValue(50)> _
Public Property Width() As Integer
Get
Return m_Width
End Get
Set(ByVal Value As Integer)
m_Width = Value
End Set
End Property

<Description("Gets or sets weather the column should be displayed in the
datagrid."), _
Category("General"), _
DefaultValue(True)> _
Public Property Visible() As Boolean
Get
Return m_Visible
End Get
Set(ByVal Value As Boolean)
m_Visible = Value
End Set
End Property

Public WriteOnly Property Collection() As Columns
Set(ByVal Value As Columns)
m_Collection = Value
End Set
End Property

<Browsable(True)> Public ReadOnly Property ColumnType() As ColumnTypes
Get
Return ColumnTypes.Base
End Get
End Property

#End Region

#Region " Methods"

Protected Sub PropertyChanged()
'Check if the collection is a valid object if not during design time you and up with a message 'Object is not set to an Instance' But Your Program
Works
'By the way I am looking forward for the IsNot operator in VS 2005,
because every time I forget the Not Operator and need to navigate back
If Not m_Collection Is Nothing Then
m_Collection.RaisePropertyChangedEvent()
End If
End Sub

Public Overrides Function ToString() As String
Return m_MappingName
End Function

#End Region

Friend Class BaseColumnConverter
Inherits ExpandableObjectConverter

Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Dim mi As BaseColumn = CType(value, BaseColumn)
Return String.Format("{0}", mi.MappingName)
End Function

Public Overloads Function CanConvertFrom(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal sourceType As
System.Type) As Boolean

If (sourceType Is GetType(String)) Then
Return True
End If

Return MyBase.CanConvertFrom(context, sourceType)

End Function

End Class

End Class

<Serializable(), TypeConverter(GetType(TextColumn.TextColumnConvert er))> _
Public Class TextColumn
Inherits BaseColumn

Private m_Format As String

<Description("Gets or sets the character(s) that specify how text is
formatted."), _
Category("General"), _
DefaultValue("")> _
Public Property Format() As String
Get
Return m_Format
End Get
Set(ByVal Value As String)
m_Format = Value
End Set
End Property

<Browsable(True)> Public Shadows ReadOnly Property ColumnType() As
ColumnTypes
Get
Return ColumnTypes.Text
End Get
End Property

Friend Class TextColumnConverter
Inherits BaseColumn.BaseColumnConverter
Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Dim mi As TextColumn = CType(value, TextColumn)
Return String.Format("{0}", mi.MappingName)
End Function
End Class

End Class

<Serializable(), TypeConverter(GetType(CheckColumn.CheckColumnConve rter))> _ Public Class CheckColumn
Inherits BaseColumn

Protected m_TrueValue As Object
Protected m_FalseValue As Object

<Description("Gets or sets the actual value used when setting the value of the column to true."), _
Category("General"), _
DefaultValue(False)> _
Public Property TrueValue() As String
Get
Return CType(m_TrueValue, String)
End Get
Set(ByVal Value As String)
m_TrueValue = Value
End Set
End Property

<Description("Gets or sets the actual value used when setting the value of the column to false."), _
Category("General"), _
DefaultValue(False)> _
Public Property FalseValue() As String
Get
Return CType(m_FalseValue, String)
End Get
Set(ByVal Value As String)
m_FalseValue = Value
End Set
End Property

<Browsable(True)> Public Shadows ReadOnly Property ColumnType() As
ColumnTypes
Get
Return ColumnTypes.Bool
End Get
End Property

Friend Class CheckColumnConverter
Inherits BaseColumn.BaseColumnConverter
Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Dim mi As CheckColumn = CType(value, CheckColumn)
Return String.Format("{0}", mi.MappingName)
End Function
End Class

End Class

#End Region

#End Region
"Michael" <la********@gmail.com> wrote in message
news:%2****************@TK2MSFTNGP10.phx.gbl...
Dear all ..

If I want to use develop a user control and declare a public property
which the type is System.Windows.Forms.GridTableStylesCollection

For example :

Public Class LookAndView
Inherits System.Windows.Forms.UserControl
Private _Collection As GridTableStylesCollection
Public Property Styles() As
System.Windows.Forms.GridTableStylesCollection
Get
Return _Collection
End Get
Set(ByVal Value As System.Windows.Forms.GridTableStylesCollection) _Collection = Value
End Set
End Property
emd class

I want the properties Styles can edit in style collection editor during
in design mode. However, I find there some problem :
1. Styles property show empty / nothing (I know the normal case is show
collection)
2. When I click new in style collection editor and input some value into
properites. And then I click ok. During open the style collection editor. the member side still nothing.
Can any one help me to solve this problem ?
Thanks for your help
Michael VB developer


Nov 21 '05 #3

P: n/a
Hi Ambit :

I try to compile you provide sample source..

I find that the problem is find on while I drag the usercontrol on my test
form. The columns value in properties windows show nothing. and when i add
column through collectioneditor also find problem.
It always disappear when leave collectioneditor and reopen again
Any solution about this ?

Thanks

"Lincon Marine Service" <li****@netvigator.com> 级糶秎ン穝籇:%2****************@TK2MSFTNGP09.phx .gbl...
Thanks AMDRIT ..

Thank for your help .....very much
I get it and solve this problem

Michael

"AMDRIT" <am****@hotmail.com> 秎ン
news:et**************@TK2MSFTNGP09.phx.gbl い级糶...
I am working a very similar project and am running into an issue getting

the
values to save during design time. Perhaps we can share notes?

If anyone else has any ideas where I am going wrong, please let me know.
Thanks.

Here is what I have:

<Serializable(), _
ToolboxItem(True), _
TypeConverter(GetType(DatatableManager.DatatableMa nagerTypeConverter))>

_
Public Class DatatableManager
Inherits System.ComponentModel.Component

#Region " Declarations"
Private m_AllowSorting As Boolean = False
Private m_AlternatingBackColor As Color = System.Drawing.Color.White
Private m_BackColor As Color = System.Drawing.Color.White
Private m_ColumnHeadersVisible As Boolean = True
Private m_ForeColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Win dowText)
Private m_GridLineColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Con trol)
Private m_GridLineStyle As DataGridLineStyle
Private m_HeaderBackColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Con trol)
Private m_HeaderFont As Font = New Font("Microsoft Sans Serif", 8.25)
Private m_HeaderForeColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Con trolText)
Private m_LinkColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Hot Track)
Private m_MappingName As String = ""
Private m_PreferredColumnWidth As Integer = 75
Private m_PreferredRowHeight As Integer = 16
Private m_ReadOnly As Boolean = False
Private m_RowHeadersVisible As Boolean = True
Private m_RowHeaderWidth As Integer = 35
Private m_SelectionBackColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Act iveCaption)
Private m_SelectionForeColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Act iveCaptionText)
Private m_Columns As Columns
#End Region

#Region " Component Designer generated code "

Public Sub New(ByVal Container As System.ComponentModel.IContainer)
MyClass.New()

'Required for Windows.Forms Class Composition Designer support
Container.Add(Me)
m_Columns = New Columns
End Sub

Public Sub New()
MyBase.New()

'This call is required by the Component Designer.
InitializeComponent()

'Add any initialization after the InitializeComponent() call
End Sub

'Component overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub

'Required by the Component Designer
Private components As System.ComponentModel.IContainer

'NOTE: The following procedure is required by the Component Designer
'It can be modified using the Component Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
components = New System.ComponentModel.Container
End Sub

#End Region

#Region " Properties"

<Description("Indicates whether sorting is allowed on the grid table

when
this DataGridTableStyle is used."), _
Category("Usability")> _
Public Property AllowSorting() As Boolean
Get
Return m_AllowSorting
End Get
Set(ByVal Value As Boolean)
m_AllowSorting = Value
End Set
End Property
<Description("Gets or sets the background color of odd-numbered rows of
the grid."), _
Category("Appearance")> _
Public Property AlternatingBackColor() As Color
Get
Return m_AlternatingBackColor
End Get
Set(ByVal Value As Color)
m_AlternatingBackColor = Value
End Set
End Property
<Description("Gets or sets the background color of even-numbered rows
of
the grid."), _
Category("Appearance")> _
Public Property BackColor() As Color
Get
Return m_BackColor
End Get
Set(ByVal Value As Color)
m_BackColor = Value
End Set
End Property
<Description("Gets or sets a value indicating whether column headers
are
visible."), _
Category("Appearance")> _
Public Property ColumnHeadersVisible() As Boolean
Get
Return m_ColumnHeadersVisible
End Get
Set(ByVal Value As Boolean)
m_ColumnHeadersVisible = Value
End Set
End Property
<Description("Gets or sets the foreground color of the grid table."), _
Category("Appearance"), _
DefaultValue(True)> _
Public Property ForeColor() As Color
Get
Return m_ForeColor
End Get
Set(ByVal Value As Color)
m_ForeColor = Value
End Set
End Property
<Description("Gets or sets the color of grid lines."), _
Category("Appearance")> _
Public Property GridLineColor() As Color
Get
Return m_GridLineColor
End Get
Set(ByVal Value As Color)
m_GridLineColor = Value
End Set
End Property
<Description("Gets or sets the style of grid lines."), _
Category("Appearance")> _
Public Property GridLineStyle() As DataGridLineStyle
Get
Return m_GridLineStyle
End Get
Set(ByVal Value As DataGridLineStyle)
m_GridLineStyle = Value
End Set
End Property
<Description("Gets or sets the background color of headers."), _
Category("Appearance")> _
Public Property HeaderBackColor() As Color
Get
Return m_HeaderBackColor
End Get
Set(ByVal Value As Color)
m_HeaderBackColor = Value
End Set
End Property
<Description("Gets or sets the font used for header captions."), _
Category("Appearance")> _
Public Property HeaderFont() As Font
Get
Return m_HeaderFont
End Get
Set(ByVal Value As Font)
m_HeaderFont = Value
End Set
End Property
<Description("Gets or sets the foreground color of headers."), _
Category("Appearance")> _
Public Property HeaderForeColor() As Color
Get
Return m_HeaderForeColor
End Get
Set(ByVal Value As Color)
m_HeaderForeColor = Value
End Set
End Property
<Description("Gets or sets the color of link text."), _
Category("Appearance")> _
Public Property LinkColor() As Color
Get
Return m_LinkColor
End Get
Set(ByVal Value As Color)
m_LinkColor = Value
End Set
End Property
<Description("Gets or sets the name used to map this table to a
specific
data source."), _
Category("General")> _
Public Property MappingName() As String
Get
Return m_MappingName
End Get
Set(ByVal Value As String)
m_MappingName = Value
End Set
End Property
<Description("Gets or sets the width used to create columns when a new
grid is displayed."), _
Category("General")> _
Public Property PreferredColumnWidth() As Integer
Get
Return m_PreferredColumnWidth
End Get
Set(ByVal Value As Integer)
m_PreferredColumnWidth = Value
End Set
End Property
<Description("Gets or sets the height used to create a row when a new

grid
is displayed."), _
Category("Appearance")> _
Public Property PreferredRowHeight() As Integer
Get
Return m_PreferredRowHeight
End Get
Set(ByVal Value As Integer)
m_PreferredRowHeight = Value
End Set
End Property
<Description("Gets or sets a value indicating whether columns can be
edited."), _
Category("Usability")> _
Public Property [ReadOnly]() As Boolean
Get
Return m_ReadOnly
End Get
Set(ByVal Value As Boolean)
m_ReadOnly = Value
End Set
End Property
<Description("Gets or sets a value indicating whether row headers are
visible."), _
Category("Appearance")> _
Public Property RowHeadersVisible() As Boolean
Get
Return m_RowHeadersVisible
End Get
Set(ByVal Value As Boolean)
m_RowHeadersVisible = Value
End Set
End Property
<Description("Gets or sets the width of row headers."), _
Category("Appearance")> _
Public Property RowHeaderWidth() As Integer
Get
Return m_RowHeaderWidth
End Get
Set(ByVal Value As Integer)
m_RowHeaderWidth = Value
End Set
End Property
<Description("Gets or sets the background color of selected cells."), _
Category("Appearance")> _
Public Property SelectionBackColor() As Color
Get
Return m_SelectionBackColor
End Get
Set(ByVal Value As Color)
m_SelectionBackColor = Value
End Set
End Property
<Description("Gets or sets the foreground color of selected cells."), _
Category("Appearance")> _
Public Property SelectionForeColor() As Color
Get
Return m_SelectionForeColor
End Get
Set(ByVal Value As Color)
m_SelectionForeColor = Value
End Set
End Property
<Description("Gets or sets the collection of columns available for

display
in the datagrid."), _
Category("Data"), _

DesignerSerializationVisibility(DesignerSerializat ionVisibility.Content),
_
Editor(GetType(ColumnCollectionEditor), GetType(UITypeEditor))> _
Public Property Columns() As Columns
Get
Return m_Columns
End Get
Set(ByVal Value As Columns)
m_Columns = Value
End Set
End Property

#End Region

Friend Class DatatableManagerTypeConverter
Inherits ExpandableObjectConverter

Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Return String.Format("Data table manager")
End Function

Public Overloads Function CanConvertFrom(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal sourceType As
System.Type) As Boolean

If (sourceType Is GetType(String)) Then
Return True
End If

Return MyBase.CanConvertFrom(context, sourceType)

End Function
End Class

Friend Class DatatableManagerDesigner
Inherits System.Windows.Forms.Design.ControlDesigner

Private MyControl As DatatableManager

Public Overrides Sub Initialize(ByVal component As IComponent)

Try
MyBase.Initialize(component)

'// Record instance of control we're designing
MyControl = DirectCast(component, DatatableManager)

'// Hook up events
Dim s As ISelectionService =
DirectCast(GetService(GetType(ISelectionService)), ISelectionService)
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)
AddHandler s.SelectionChanged, New EventHandler(AddressOf
OnSelectionChanged)
AddHandler c.ComponentRemoving, New

ComponentEventHandler(AddressOf
OnComponentRemoving)
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try
End Sub

Private Sub OnSelectionChanged(ByVal sender As Object, ByVal e As
System.EventArgs)

'MyControl.OnSelectionChanged()

End Sub

Private Sub OnComponentRemoving(ByVal sender As Object, ByVal e As
ComponentEventArgs)

Try
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)
Dim bc As BaseColumn
Dim h As IDesignerHost =
DirectCast(GetService(GetType(IDesignerHost)), IDesignerHost)

'// If the user is removing a button
If (TypeOf e.Component Is BaseColumn) Then

bc = DirectCast(e.Component, BaseColumn)
If (MyControl.Columns.Contains(bc)) Then

c.OnComponentChanging(MyControl, Nothing)
MyControl.Columns.Remove(bc)
c.OnComponentChanged(MyControl, Nothing, Nothing, Nothing)
Return
End If
End If

'// If the user is removing the control itself
If (e.Component Is MyControl) Then

For i As Int32 = MyControl.Columns.Count - 1 To 0 Step -1

bc = MyControl.Columns(i)
c.OnComponentChanging(MyControl, Nothing)
MyControl.Columns.Remove(bc)
h.DestroyComponent(bc)
c.OnComponentChanged(MyControl, Nothing, Nothing, Nothing)
Next i

End If
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try
End Sub

Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)

Try
Dim s As ISelectionService =
DirectCast(GetService(GetType(ISelectionService)), ISelectionService)
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)

'// Unhook events
RemoveHandler s.SelectionChanged, New EventHandler(AddressOf
OnSelectionChanged)
RemoveHandler c.ComponentRemoving, New
ComponentEventHandler(AddressOf OnComponentRemoving)
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

MyBase.Dispose(disposing)

End Sub

Public Overrides ReadOnly Property AssociatedComponents() As
System.Collections.ICollection
Get

Try
Return MyControl.Columns
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

End Get
End Property

Public Overrides ReadOnly Property Verbs() As
System.ComponentModel.Design.DesignerVerbCollectio n

Get

Try
Dim v As DesignerVerbCollection = New DesignerVerbCollection

'// Verb to add buttons
v.Add(New DesignerVerb("&Add Column", New
EventHandler(AddressOf
OnAddButton)))

Return v
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

End Get

End Property

Private Sub OnAddButton(ByVal sender As Object, ByVal e As
System.EventArgs)

Try
Dim bc As BaseColumn
Dim h As IDesignerHost =
DirectCast(GetService(GetType(IDesignerHost)), IDesignerHost)
Dim dt As DesignerTransaction
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)

'// Add a new button to the collection
dt = h.CreateTransaction("Add Column")
bc = DirectCast(h.CreateComponent(GetType(BaseColumn)),

BaseColumn)
c.OnComponentChanging(MyControl, Nothing)
MyControl.Columns.Add(bc)
c.OnComponentChanged(MyControl, Nothing, Nothing, Nothing)
dt.Commit()
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

End Sub

End Class
End Class

#Region " Column Collection "

'<TypeConverter(GetType(Columns.ColumnsTypeConvert er))>

Public Class Columns
Inherits CollectionBase

Event PropertyChaged()

'<DesignerSerializationVisibility(DesignerSerializ ationVisibility.Content)>

Default Public Property Item(ByVal index As Integer) As BaseColumn
Get
Try
Return CType(List(index), BaseColumn)
Catch ex As Exception
Return Nothing
End Try
End Get
Set(ByVal Value As BaseColumn)
List(index) = Value
End Set
End Property

Public Function Add(ByVal value As BaseColumn) As Integer
Return List.Add(value)
value.Collection = Me
End Function 'Add

Public Sub AddRange(ByVal Items() As BaseColumn)
Dim Item As Object
For Each Item In Items
CType(Item, BaseColumn).Collection = Me
list.Add(Item)
Next
End Sub

Public Function IndexOf(ByVal value As BaseColumn) As Integer
Return List.IndexOf(value)
End Function 'IndexOf

Public Sub Insert(ByVal index As Integer, ByVal value As BaseColumn)
List.Insert(index, value)
End Sub 'Insert

Public Sub Remove(ByVal value As BaseColumn)
List.Remove(value)

End Sub 'Remove

Public Function Contains(ByVal value As BaseColumn) As Boolean
' If value is not of type BaseColumn, this will return false.
Return List.Contains(value)
End Function 'Contains

Protected Shadows Sub OnInsert(ByVal index As Integer, ByVal value As
BaseColumn)
' Insert additional code to be run only when inserting values.
End Sub 'OnInsert

Protected Shadows Sub OnRemove(ByVal index As Integer, ByVal value As
BaseColumn)
' Insert additional code to be run only when removing values.
End Sub 'OnRemove

Protected Shadows Sub OnSet(ByVal index As Integer, ByVal oldValue As
BaseColumn, ByVal newValue As BaseColumn)
' Insert additional code to be run only when setting values.
End Sub 'OnSet

Protected Shadows Sub OnValidate(ByVal value As BaseColumn)
'If Not value.GetType() Is Type.GetType("BaseColumn") Then
'Throw New ArgumentException("value must be of type BaseColumn.",
"value")
'End If
End Sub 'OnValidate

Friend Sub RaisePropertyChangedEvent()
RaiseEvent PropertyChaged()
End Sub

Friend Class ColumnsTypeConverter
Inherits ExpandableObjectConverter

Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Return String.Format("Collection")
End Function

Public Overloads Function CanConvertFrom(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal sourceType As
System.Type) As Boolean

If (sourceType Is GetType(String)) Then
Return True
End If

Return MyBase.CanConvertFrom(context, sourceType)

End Function
End Class

End Class

#Region " ColumnCollectionEditor"

Friend Class ColumnCollectionEditor
Inherits System.ComponentModel.Design.CollectionEditor

Private Types() As System.Type
Private cf As CollectionForm

Sub New(ByVal type As System.Type)
MyBase.New(type)
Types = New System.Type() {GetType(BaseColumn), GetType(TextColumn),
GetType(CheckColumn)}
End Sub

Protected Overrides Function CreateNewItemTypes() As System.Type()
Return Types
End Function

Protected Overrides Function CreateCollectionForm() As
System.ComponentModel.Design.CollectionEditor.Coll ectionForm
Me.cf = MyBase.CreateCollectionForm
Return Me.cf
End Function

Protected Overloads Overrides Function CreateInstance(ByVal itemType As
System.Type) As Object

Dim blahblah As BaseColumn =

DirectCast(MyBase.CreateInstance(itemType),
BaseColumn)

If Not Me.Context.Instance Is Nothing Then
End If

Return blahblah

End Function

End Class

#End Region

#Region " Columns Types"

<Serializable(), TypeConverter(GetType(BaseColumn.BaseColumnConvert er))>
_
Public Class BaseColumn
Inherits Component

Public Enum ColumnTypes
Base = 1
Text = 2
Bool = 3
End Enum

#Region " Declarations "

Protected m_Alignment As System.Windows.Forms.HorizontalAlignment
Protected m_HeaderText As String
Protected m_MappingName As String
Protected m_NullText As String
Protected m_ReadOnly As Boolean
Protected m_Width As Integer
Protected m_Visible As Boolean
Protected m_Collection As Columns
Protected m_ColumnType As ColumnTypes

#End Region

#Region " Properties"

<Description("Gets or sets the alignment of text in a column."), _
Category("General"), _
DefaultValue(System.Windows.Forms.HorizontalAlignm ent.Left)> _
Public Property Alignment() As System.Windows.Forms.HorizontalAlignment
Get
Return m_Alignment
End Get
Set(ByVal Value As System.Windows.Forms.HorizontalAlignment)
m_Alignment = Value
End Set
End Property

<Description("Gets or sets the text of the column header."), _
Category("General"), _
DefaultValue("")> _
Public Property HeaderText() As String
Get
Return m_HeaderText
End Get
Set(ByVal Value As String)
m_HeaderText = Value
End Set
End Property

<Description("Gets or sets the name used to map the column style to a

data
member."), _
Category("General"), _
DefaultValue("")> _
Public Property MappingName() As String
Get
Return m_MappingName
End Get
Set(ByVal Value As String)
m_MappingName = Value
End Set
End Property

<Description("Gets or sets the text that is displayed when the column
contains a null reference (Nothing in Visual Basic)."), _
Category("General"), _
DefaultValue("")> _
Public Property NullText() As String
Get
Return m_NullText
End Get
Set(ByVal Value As String)
m_NullText = Value
End Set
End Property

<Description("Gets or sets a value indicating whether the data in the
column can be edited."), _
Category("General"), _
DefaultValue(True)> _
Public Property [ReadOnly]() As Boolean
Get
Return m_ReadOnly
End Get
Set(ByVal Value As Boolean)
m_ReadOnly = Value
End Set
End Property

<Description("Gets or sets the width of the column."), _
Category("General"), _
DefaultValue(50)> _
Public Property Width() As Integer
Get
Return m_Width
End Get
Set(ByVal Value As Integer)
m_Width = Value
End Set
End Property

<Description("Gets or sets weather the column should be displayed in
the
datagrid."), _
Category("General"), _
DefaultValue(True)> _
Public Property Visible() As Boolean
Get
Return m_Visible
End Get
Set(ByVal Value As Boolean)
m_Visible = Value
End Set
End Property

Public WriteOnly Property Collection() As Columns
Set(ByVal Value As Columns)
m_Collection = Value
End Set
End Property

<Browsable(True)> Public ReadOnly Property ColumnType() As ColumnTypes
Get
Return ColumnTypes.Base
End Get
End Property

#End Region

#Region " Methods"

Protected Sub PropertyChanged()
'Check if the collection is a valid object if not during design time

you
and up with a message 'Object is not set to an Instance' But Your Program
Works
'By the way I am looking forward for the IsNot operator in VS 2005,
because every time I forget the Not Operator and need to navigate back
If Not m_Collection Is Nothing Then
m_Collection.RaisePropertyChangedEvent()
End If
End Sub

Public Overrides Function ToString() As String
Return m_MappingName
End Function

#End Region

Friend Class BaseColumnConverter
Inherits ExpandableObjectConverter

Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Dim mi As BaseColumn = CType(value, BaseColumn)
Return String.Format("{0}", mi.MappingName)
End Function

Public Overloads Function CanConvertFrom(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal sourceType As
System.Type) As Boolean

If (sourceType Is GetType(String)) Then
Return True
End If

Return MyBase.CanConvertFrom(context, sourceType)

End Function

End Class

End Class

<Serializable(), TypeConverter(GetType(TextColumn.TextColumnConvert er))>
_
Public Class TextColumn
Inherits BaseColumn

Private m_Format As String

<Description("Gets or sets the character(s) that specify how text is
formatted."), _
Category("General"), _
DefaultValue("")> _
Public Property Format() As String
Get
Return m_Format
End Get
Set(ByVal Value As String)
m_Format = Value
End Set
End Property

<Browsable(True)> Public Shadows ReadOnly Property ColumnType() As
ColumnTypes
Get
Return ColumnTypes.Text
End Get
End Property

Friend Class TextColumnConverter
Inherits BaseColumn.BaseColumnConverter
Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Dim mi As TextColumn = CType(value, TextColumn)
Return String.Format("{0}", mi.MappingName)
End Function
End Class

End Class

<Serializable(),
TypeConverter(GetType(CheckColumn.CheckColumnConve rter))>

_
Public Class CheckColumn
Inherits BaseColumn

Protected m_TrueValue As Object
Protected m_FalseValue As Object

<Description("Gets or sets the actual value used when setting the value

of
the column to true."), _
Category("General"), _
DefaultValue(False)> _
Public Property TrueValue() As String
Get
Return CType(m_TrueValue, String)
End Get
Set(ByVal Value As String)
m_TrueValue = Value
End Set
End Property

<Description("Gets or sets the actual value used when setting the value

of
the column to false."), _
Category("General"), _
DefaultValue(False)> _
Public Property FalseValue() As String
Get
Return CType(m_FalseValue, String)
End Get
Set(ByVal Value As String)
m_FalseValue = Value
End Set
End Property

<Browsable(True)> Public Shadows ReadOnly Property ColumnType() As
ColumnTypes
Get
Return ColumnTypes.Bool
End Get
End Property

Friend Class CheckColumnConverter
Inherits BaseColumn.BaseColumnConverter
Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Dim mi As CheckColumn = CType(value, CheckColumn)
Return String.Format("{0}", mi.MappingName)
End Function
End Class

End Class

#End Region

#End Region
"Michael" <la********@gmail.com> wrote in message
news:%2****************@TK2MSFTNGP10.phx.gbl...
> Dear all ..
>
> If I want to use develop a user control and declare a public property
> which the type is System.Windows.Forms.GridTableStylesCollection
>
> For example :
>
> Public Class LookAndView
> Inherits System.Windows.Forms.UserControl
> Private _Collection As GridTableStylesCollection
>
>
> Public Property Styles() As
> System.Windows.Forms.GridTableStylesCollection
> Get
> Return _Collection
> End Get
> Set(ByVal Value As System.Windows.Forms.GridTableStylesCollection) > _Collection = Value
> End Set
> End Property
> emd class
>
> I want the properties Styles can edit in style collection editor
> during
> in design mode. However, I find there some problem :
> 1. Styles property show empty / nothing (I know the normal case is show
> collection)
> 2. When I click new in style collection editor and input some value
> into
> properites. And then I click ok. During open the style collection editor. > the member side still nothing.
>
>
> Can any one help me to solve this problem ?
>
>
> Thanks for your help
>
>
> Michael VB developer
>



Nov 21 '05 #4

P: n/a
That is where I am stuck. I cannot seem to find a way to get the properties
to be remembered.
"Michael" <la********@gmail.com> wrote in message
news:Ox******************@TK2MSFTNGP09.phx.gbl...
Hi Ambit :

I try to compile you provide sample source..

I find that the problem is find on while I drag the usercontrol on my test
form. The columns value in properties windows show nothing. and when i add
column through collectioneditor also find problem.
It always disappear when leave collectioneditor and reopen again
Any solution about this ?

Thanks

"Lincon Marine Service" <li****@netvigator.com>
级糶秎ン穝籇:%2****************@TK2MSFTNGP09.phx .gbl...
Thanks AMDRIT ..

Thank for your help .....very much
I get it and solve this problem

Michael

"AMDRIT" <am****@hotmail.com> 秎ン
news:et**************@TK2MSFTNGP09.phx.gbl い级糶...
I am working a very similar project and am running into an issue getting

the
values to save during design time. Perhaps we can share notes?

If anyone else has any ideas where I am going wrong, please let me know.
Thanks.

Here is what I have:

<Serializable(), _
ToolboxItem(True), _

TypeConverter(GetType(DatatableManager.DatatableMa nagerTypeConverter))>

_
Public Class DatatableManager
Inherits System.ComponentModel.Component

#Region " Declarations"
Private m_AllowSorting As Boolean = False
Private m_AlternatingBackColor As Color = System.Drawing.Color.White
Private m_BackColor As Color = System.Drawing.Color.White
Private m_ColumnHeadersVisible As Boolean = True
Private m_ForeColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Win dowText)
Private m_GridLineColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Con trol)
Private m_GridLineStyle As DataGridLineStyle
Private m_HeaderBackColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Con trol)
Private m_HeaderFont As Font = New Font("Microsoft Sans Serif", 8.25)
Private m_HeaderForeColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Con trolText)
Private m_LinkColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Hot Track)
Private m_MappingName As String = ""
Private m_PreferredColumnWidth As Integer = 75
Private m_PreferredRowHeight As Integer = 16
Private m_ReadOnly As Boolean = False
Private m_RowHeadersVisible As Boolean = True
Private m_RowHeaderWidth As Integer = 35
Private m_SelectionBackColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Act iveCaption)
Private m_SelectionForeColor As Color =
System.Drawing.Color.FromKnownColor(KnownColor.Act iveCaptionText)
Private m_Columns As Columns
#End Region

#Region " Component Designer generated code "

Public Sub New(ByVal Container As System.ComponentModel.IContainer)
MyClass.New()

'Required for Windows.Forms Class Composition Designer support
Container.Add(Me)
m_Columns = New Columns
End Sub

Public Sub New()
MyBase.New()

'This call is required by the Component Designer.
InitializeComponent()

'Add any initialization after the InitializeComponent() call
End Sub

'Component overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub

'Required by the Component Designer
Private components As System.ComponentModel.IContainer

'NOTE: The following procedure is required by the Component Designer
'It can be modified using the Component Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
components = New System.ComponentModel.Container
End Sub

#End Region

#Region " Properties"

<Description("Indicates whether sorting is allowed on the grid table

when
this DataGridTableStyle is used."), _
Category("Usability")> _
Public Property AllowSorting() As Boolean
Get
Return m_AllowSorting
End Get
Set(ByVal Value As Boolean)
m_AllowSorting = Value
End Set
End Property
<Description("Gets or sets the background color of odd-numbered rows
of
the grid."), _
Category("Appearance")> _
Public Property AlternatingBackColor() As Color
Get
Return m_AlternatingBackColor
End Get
Set(ByVal Value As Color)
m_AlternatingBackColor = Value
End Set
End Property
<Description("Gets or sets the background color of even-numbered rows
of
the grid."), _
Category("Appearance")> _
Public Property BackColor() As Color
Get
Return m_BackColor
End Get
Set(ByVal Value As Color)
m_BackColor = Value
End Set
End Property
<Description("Gets or sets a value indicating whether column headers
are
visible."), _
Category("Appearance")> _
Public Property ColumnHeadersVisible() As Boolean
Get
Return m_ColumnHeadersVisible
End Get
Set(ByVal Value As Boolean)
m_ColumnHeadersVisible = Value
End Set
End Property
<Description("Gets or sets the foreground color of the grid table."),
_
Category("Appearance"), _
DefaultValue(True)> _
Public Property ForeColor() As Color
Get
Return m_ForeColor
End Get
Set(ByVal Value As Color)
m_ForeColor = Value
End Set
End Property
<Description("Gets or sets the color of grid lines."), _
Category("Appearance")> _
Public Property GridLineColor() As Color
Get
Return m_GridLineColor
End Get
Set(ByVal Value As Color)
m_GridLineColor = Value
End Set
End Property
<Description("Gets or sets the style of grid lines."), _
Category("Appearance")> _
Public Property GridLineStyle() As DataGridLineStyle
Get
Return m_GridLineStyle
End Get
Set(ByVal Value As DataGridLineStyle)
m_GridLineStyle = Value
End Set
End Property
<Description("Gets or sets the background color of headers."), _
Category("Appearance")> _
Public Property HeaderBackColor() As Color
Get
Return m_HeaderBackColor
End Get
Set(ByVal Value As Color)
m_HeaderBackColor = Value
End Set
End Property
<Description("Gets or sets the font used for header captions."), _
Category("Appearance")> _
Public Property HeaderFont() As Font
Get
Return m_HeaderFont
End Get
Set(ByVal Value As Font)
m_HeaderFont = Value
End Set
End Property
<Description("Gets or sets the foreground color of headers."), _
Category("Appearance")> _
Public Property HeaderForeColor() As Color
Get
Return m_HeaderForeColor
End Get
Set(ByVal Value As Color)
m_HeaderForeColor = Value
End Set
End Property
<Description("Gets or sets the color of link text."), _
Category("Appearance")> _
Public Property LinkColor() As Color
Get
Return m_LinkColor
End Get
Set(ByVal Value As Color)
m_LinkColor = Value
End Set
End Property
<Description("Gets or sets the name used to map this table to a
specific
data source."), _
Category("General")> _
Public Property MappingName() As String
Get
Return m_MappingName
End Get
Set(ByVal Value As String)
m_MappingName = Value
End Set
End Property
<Description("Gets or sets the width used to create columns when a new
grid is displayed."), _
Category("General")> _
Public Property PreferredColumnWidth() As Integer
Get
Return m_PreferredColumnWidth
End Get
Set(ByVal Value As Integer)
m_PreferredColumnWidth = Value
End Set
End Property
<Description("Gets or sets the height used to create a row when a new

grid
is displayed."), _
Category("Appearance")> _
Public Property PreferredRowHeight() As Integer
Get
Return m_PreferredRowHeight
End Get
Set(ByVal Value As Integer)
m_PreferredRowHeight = Value
End Set
End Property
<Description("Gets or sets a value indicating whether columns can be
edited."), _
Category("Usability")> _
Public Property [ReadOnly]() As Boolean
Get
Return m_ReadOnly
End Get
Set(ByVal Value As Boolean)
m_ReadOnly = Value
End Set
End Property
<Description("Gets or sets a value indicating whether row headers are
visible."), _
Category("Appearance")> _
Public Property RowHeadersVisible() As Boolean
Get
Return m_RowHeadersVisible
End Get
Set(ByVal Value As Boolean)
m_RowHeadersVisible = Value
End Set
End Property
<Description("Gets or sets the width of row headers."), _
Category("Appearance")> _
Public Property RowHeaderWidth() As Integer
Get
Return m_RowHeaderWidth
End Get
Set(ByVal Value As Integer)
m_RowHeaderWidth = Value
End Set
End Property
<Description("Gets or sets the background color of selected cells."),
_
Category("Appearance")> _
Public Property SelectionBackColor() As Color
Get
Return m_SelectionBackColor
End Get
Set(ByVal Value As Color)
m_SelectionBackColor = Value
End Set
End Property
<Description("Gets or sets the foreground color of selected cells."),
_
Category("Appearance")> _
Public Property SelectionForeColor() As Color
Get
Return m_SelectionForeColor
End Get
Set(ByVal Value As Color)
m_SelectionForeColor = Value
End Set
End Property
<Description("Gets or sets the collection of columns available for

display
in the datagrid."), _
Category("Data"), _

DesignerSerializationVisibility(DesignerSerializat ionVisibility.Content),
_
Editor(GetType(ColumnCollectionEditor), GetType(UITypeEditor))> _
Public Property Columns() As Columns
Get
Return m_Columns
End Get
Set(ByVal Value As Columns)
m_Columns = Value
End Set
End Property

#End Region

Friend Class DatatableManagerTypeConverter
Inherits ExpandableObjectConverter

Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Return String.Format("Data table manager")
End Function

Public Overloads Function CanConvertFrom(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal sourceType As
System.Type) As Boolean

If (sourceType Is GetType(String)) Then
Return True
End If

Return MyBase.CanConvertFrom(context, sourceType)

End Function
End Class

Friend Class DatatableManagerDesigner
Inherits System.Windows.Forms.Design.ControlDesigner

Private MyControl As DatatableManager

Public Overrides Sub Initialize(ByVal component As IComponent)

Try
MyBase.Initialize(component)

'// Record instance of control we're designing
MyControl = DirectCast(component, DatatableManager)

'// Hook up events
Dim s As ISelectionService =
DirectCast(GetService(GetType(ISelectionService)), ISelectionService)
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)
AddHandler s.SelectionChanged, New EventHandler(AddressOf
OnSelectionChanged)
AddHandler c.ComponentRemoving, New

ComponentEventHandler(AddressOf
OnComponentRemoving)
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try
End Sub

Private Sub OnSelectionChanged(ByVal sender As Object, ByVal e As
System.EventArgs)

'MyControl.OnSelectionChanged()

End Sub

Private Sub OnComponentRemoving(ByVal sender As Object, ByVal e As
ComponentEventArgs)

Try
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)
Dim bc As BaseColumn
Dim h As IDesignerHost =
DirectCast(GetService(GetType(IDesignerHost)), IDesignerHost)

'// If the user is removing a button
If (TypeOf e.Component Is BaseColumn) Then

bc = DirectCast(e.Component, BaseColumn)
If (MyControl.Columns.Contains(bc)) Then

c.OnComponentChanging(MyControl, Nothing)
MyControl.Columns.Remove(bc)
c.OnComponentChanged(MyControl, Nothing, Nothing, Nothing)
Return
End If
End If

'// If the user is removing the control itself
If (e.Component Is MyControl) Then

For i As Int32 = MyControl.Columns.Count - 1 To 0 Step -1

bc = MyControl.Columns(i)
c.OnComponentChanging(MyControl, Nothing)
MyControl.Columns.Remove(bc)
h.DestroyComponent(bc)
c.OnComponentChanged(MyControl, Nothing, Nothing, Nothing)
Next i

End If
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try
End Sub

Protected Overloads Overrides Sub Dispose(ByVal disposing As
Boolean)

Try
Dim s As ISelectionService =
DirectCast(GetService(GetType(ISelectionService)), ISelectionService)
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)

'// Unhook events
RemoveHandler s.SelectionChanged, New EventHandler(AddressOf
OnSelectionChanged)
RemoveHandler c.ComponentRemoving, New
ComponentEventHandler(AddressOf OnComponentRemoving)
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

MyBase.Dispose(disposing)

End Sub

Public Overrides ReadOnly Property AssociatedComponents() As
System.Collections.ICollection
Get

Try
Return MyControl.Columns
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

End Get
End Property

Public Overrides ReadOnly Property Verbs() As
System.ComponentModel.Design.DesignerVerbCollectio n

Get

Try
Dim v As DesignerVerbCollection = New DesignerVerbCollection

'// Verb to add buttons
v.Add(New DesignerVerb("&Add Column", New
EventHandler(AddressOf
OnAddButton)))

Return v
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

End Get

End Property

Private Sub OnAddButton(ByVal sender As Object, ByVal e As
System.EventArgs)

Try
Dim bc As BaseColumn
Dim h As IDesignerHost =
DirectCast(GetService(GetType(IDesignerHost)), IDesignerHost)
Dim dt As DesignerTransaction
Dim c As IComponentChangeService =
DirectCast(GetService(GetType(IComponentChangeServ ice)),
IComponentChangeService)

'// Add a new button to the collection
dt = h.CreateTransaction("Add Column")
bc = DirectCast(h.CreateComponent(GetType(BaseColumn)),

BaseColumn)
c.OnComponentChanging(MyControl, Nothing)
MyControl.Columns.Add(bc)
c.OnComponentChanged(MyControl, Nothing, Nothing, Nothing)
dt.Commit()
Catch ex As Exception
Debug.WriteLine(ex.ToString)
End Try

End Sub

End Class
End Class

#Region " Column Collection "

'<TypeConverter(GetType(Columns.ColumnsTypeConvert er))>

Public Class Columns
Inherits CollectionBase

Event PropertyChaged()

'<DesignerSerializationVisibility(DesignerSerializ ationVisibility.Content)>

Default Public Property Item(ByVal index As Integer) As BaseColumn
Get
Try
Return CType(List(index), BaseColumn)
Catch ex As Exception
Return Nothing
End Try
End Get
Set(ByVal Value As BaseColumn)
List(index) = Value
End Set
End Property

Public Function Add(ByVal value As BaseColumn) As Integer
Return List.Add(value)
value.Collection = Me
End Function 'Add

Public Sub AddRange(ByVal Items() As BaseColumn)
Dim Item As Object
For Each Item In Items
CType(Item, BaseColumn).Collection = Me
list.Add(Item)
Next
End Sub

Public Function IndexOf(ByVal value As BaseColumn) As Integer
Return List.IndexOf(value)
End Function 'IndexOf

Public Sub Insert(ByVal index As Integer, ByVal value As BaseColumn)
List.Insert(index, value)
End Sub 'Insert

Public Sub Remove(ByVal value As BaseColumn)
List.Remove(value)

End Sub 'Remove

Public Function Contains(ByVal value As BaseColumn) As Boolean
' If value is not of type BaseColumn, this will return false.
Return List.Contains(value)
End Function 'Contains

Protected Shadows Sub OnInsert(ByVal index As Integer, ByVal value As
BaseColumn)
' Insert additional code to be run only when inserting values.
End Sub 'OnInsert

Protected Shadows Sub OnRemove(ByVal index As Integer, ByVal value As
BaseColumn)
' Insert additional code to be run only when removing values.
End Sub 'OnRemove

Protected Shadows Sub OnSet(ByVal index As Integer, ByVal oldValue As
BaseColumn, ByVal newValue As BaseColumn)
' Insert additional code to be run only when setting values.
End Sub 'OnSet

Protected Shadows Sub OnValidate(ByVal value As BaseColumn)
'If Not value.GetType() Is Type.GetType("BaseColumn") Then
'Throw New ArgumentException("value must be of type BaseColumn.",
"value")
'End If
End Sub 'OnValidate

Friend Sub RaisePropertyChangedEvent()
RaiseEvent PropertyChaged()
End Sub

Friend Class ColumnsTypeConverter
Inherits ExpandableObjectConverter

Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Return String.Format("Collection")
End Function

Public Overloads Function CanConvertFrom(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal sourceType As
System.Type) As Boolean

If (sourceType Is GetType(String)) Then
Return True
End If

Return MyBase.CanConvertFrom(context, sourceType)

End Function
End Class

End Class

#Region " ColumnCollectionEditor"

Friend Class ColumnCollectionEditor
Inherits System.ComponentModel.Design.CollectionEditor

Private Types() As System.Type
Private cf As CollectionForm

Sub New(ByVal type As System.Type)
MyBase.New(type)
Types = New System.Type() {GetType(BaseColumn), GetType(TextColumn),
GetType(CheckColumn)}
End Sub

Protected Overrides Function CreateNewItemTypes() As System.Type()
Return Types
End Function

Protected Overrides Function CreateCollectionForm() As
System.ComponentModel.Design.CollectionEditor.Coll ectionForm
Me.cf = MyBase.CreateCollectionForm
Return Me.cf
End Function

Protected Overloads Overrides Function CreateInstance(ByVal itemType
As
System.Type) As Object

Dim blahblah As BaseColumn =

DirectCast(MyBase.CreateInstance(itemType),
BaseColumn)

If Not Me.Context.Instance Is Nothing Then
End If

Return blahblah

End Function

End Class

#End Region

#Region " Columns Types"

<Serializable(), TypeConverter(GetType(BaseColumn.BaseColumnConvert er))>
_
Public Class BaseColumn
Inherits Component

Public Enum ColumnTypes
Base = 1
Text = 2
Bool = 3
End Enum

#Region " Declarations "

Protected m_Alignment As System.Windows.Forms.HorizontalAlignment
Protected m_HeaderText As String
Protected m_MappingName As String
Protected m_NullText As String
Protected m_ReadOnly As Boolean
Protected m_Width As Integer
Protected m_Visible As Boolean
Protected m_Collection As Columns
Protected m_ColumnType As ColumnTypes

#End Region

#Region " Properties"

<Description("Gets or sets the alignment of text in a column."), _
Category("General"), _
DefaultValue(System.Windows.Forms.HorizontalAlignm ent.Left)> _
Public Property Alignment() As
System.Windows.Forms.HorizontalAlignment
Get
Return m_Alignment
End Get
Set(ByVal Value As System.Windows.Forms.HorizontalAlignment)
m_Alignment = Value
End Set
End Property

<Description("Gets or sets the text of the column header."), _
Category("General"), _
DefaultValue("")> _
Public Property HeaderText() As String
Get
Return m_HeaderText
End Get
Set(ByVal Value As String)
m_HeaderText = Value
End Set
End Property

<Description("Gets or sets the name used to map the column style to a

data
member."), _
Category("General"), _
DefaultValue("")> _
Public Property MappingName() As String
Get
Return m_MappingName
End Get
Set(ByVal Value As String)
m_MappingName = Value
End Set
End Property

<Description("Gets or sets the text that is displayed when the column
contains a null reference (Nothing in Visual Basic)."), _
Category("General"), _
DefaultValue("")> _
Public Property NullText() As String
Get
Return m_NullText
End Get
Set(ByVal Value As String)
m_NullText = Value
End Set
End Property

<Description("Gets or sets a value indicating whether the data in the
column can be edited."), _
Category("General"), _
DefaultValue(True)> _
Public Property [ReadOnly]() As Boolean
Get
Return m_ReadOnly
End Get
Set(ByVal Value As Boolean)
m_ReadOnly = Value
End Set
End Property

<Description("Gets or sets the width of the column."), _
Category("General"), _
DefaultValue(50)> _
Public Property Width() As Integer
Get
Return m_Width
End Get
Set(ByVal Value As Integer)
m_Width = Value
End Set
End Property

<Description("Gets or sets weather the column should be displayed in
the
datagrid."), _
Category("General"), _
DefaultValue(True)> _
Public Property Visible() As Boolean
Get
Return m_Visible
End Get
Set(ByVal Value As Boolean)
m_Visible = Value
End Set
End Property

Public WriteOnly Property Collection() As Columns
Set(ByVal Value As Columns)
m_Collection = Value
End Set
End Property

<Browsable(True)> Public ReadOnly Property ColumnType() As ColumnTypes
Get
Return ColumnTypes.Base
End Get
End Property

#End Region

#Region " Methods"

Protected Sub PropertyChanged()
'Check if the collection is a valid object if not during design time

you
and up with a message 'Object is not set to an Instance' But Your
Program
Works
'By the way I am looking forward for the IsNot operator in VS 2005,
because every time I forget the Not Operator and need to navigate back
If Not m_Collection Is Nothing Then
m_Collection.RaisePropertyChangedEvent()
End If
End Sub

Public Overrides Function ToString() As String
Return m_MappingName
End Function

#End Region

Friend Class BaseColumnConverter
Inherits ExpandableObjectConverter

Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Dim mi As BaseColumn = CType(value, BaseColumn)
Return String.Format("{0}", mi.MappingName)
End Function

Public Overloads Function CanConvertFrom(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal sourceType As
System.Type) As Boolean

If (sourceType Is GetType(String)) Then
Return True
End If

Return MyBase.CanConvertFrom(context, sourceType)

End Function

End Class

End Class

<Serializable(), TypeConverter(GetType(TextColumn.TextColumnConvert er))>
_
Public Class TextColumn
Inherits BaseColumn

Private m_Format As String

<Description("Gets or sets the character(s) that specify how text is
formatted."), _
Category("General"), _
DefaultValue("")> _
Public Property Format() As String
Get
Return m_Format
End Get
Set(ByVal Value As String)
m_Format = Value
End Set
End Property

<Browsable(True)> Public Shadows ReadOnly Property ColumnType() As
ColumnTypes
Get
Return ColumnTypes.Text
End Get
End Property

Friend Class TextColumnConverter
Inherits BaseColumn.BaseColumnConverter
Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Dim mi As TextColumn = CType(value, TextColumn)
Return String.Format("{0}", mi.MappingName)
End Function
End Class

End Class

<Serializable(),
TypeConverter(GetType(CheckColumn.CheckColumnConve rter))>

_
Public Class CheckColumn
Inherits BaseColumn

Protected m_TrueValue As Object
Protected m_FalseValue As Object

<Description("Gets or sets the actual value used when setting the
value

of
the column to true."), _
Category("General"), _
DefaultValue(False)> _
Public Property TrueValue() As String
Get
Return CType(m_TrueValue, String)
End Get
Set(ByVal Value As String)
m_TrueValue = Value
End Set
End Property

<Description("Gets or sets the actual value used when setting the
value

of
the column to false."), _
Category("General"), _
DefaultValue(False)> _
Public Property FalseValue() As String
Get
Return CType(m_FalseValue, String)
End Get
Set(ByVal Value As String)
m_FalseValue = Value
End Set
End Property

<Browsable(True)> Public Shadows ReadOnly Property ColumnType() As
ColumnTypes
Get
Return ColumnTypes.Bool
End Get
End Property

Friend Class CheckColumnConverter
Inherits BaseColumn.BaseColumnConverter
Public Overloads Overrides Function ConvertTo(ByVal context As
System.ComponentModel.ITypeDescriptorContext, ByVal culture As
System.Globalization.CultureInfo, ByVal value As Object, ByVal
destinationType As System.Type) As Object
Dim mi As CheckColumn = CType(value, CheckColumn)
Return String.Format("{0}", mi.MappingName)
End Function
End Class

End Class

#End Region

#End Region
"Michael" <la********@gmail.com> wrote in message
news:%2****************@TK2MSFTNGP10.phx.gbl...
> Dear all ..
>
> If I want to use develop a user control and declare a public property
> which the type is System.Windows.Forms.GridTableStylesCollection
>
> For example :
>
> Public Class LookAndView
> Inherits System.Windows.Forms.UserControl
> Private _Collection As GridTableStylesCollection
>
>
> Public Property Styles() As
> System.Windows.Forms.GridTableStylesCollection
> Get
> Return _Collection
> End Get
> Set(ByVal Value As

System.Windows.Forms.GridTableStylesCollection)
> _Collection = Value
> End Set
> End Property
> emd class
>
> I want the properties Styles can edit in style collection editor
> during
> in design mode. However, I find there some problem :
> 1. Styles property show empty / nothing (I know the normal case is
> show
> collection)
> 2. When I click new in style collection editor and input some value
> into
> properites. And then I click ok. During open the style collection

editor.
> the member side still nothing.
>
>
> Can any one help me to solve this problem ?
>
>
> Thanks for your help
>
>
> Michael VB developer
>



Nov 21 '05 #5

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