Hello Everyone,
I would like to format the Display Members of a combobox's datasource. Is
there a way to apply a format without subclassing the original datasource?
For example, given a list of decimal values, format them as currency values
with a leading currency symbol and 2 decimal places.
TIA
Class Test
Dim SelectionList As ArrayList
Dim cbo As ComboBox
Public Sub New()
SelectionList = New ArrayList
SelectionList.A ddRange(New DataElements() {New DataElements(1D , 1), New
DataElements(1. 15D, 2), New DataElements(1. 3D, 3)})
cbo = New ComboBox
cbo.DataSource = SelectionList
cbo.DisplayMemb er = "Value"
cbo.ValueMember = "Index"
End Sub
Public Class DataElements
Private m_Value As Decimal
Private m_Index As Integer
Public Sub New(ByVal Value As Decimal, ByVal Index As Integer)
m_Value = Value
m_Index = Index
End Sub
Public ReadOnly Property Value() As Decimal
Get
Return m_Value
End Get
End Property
Public ReadOnly Property Index() As Integer
Get
Return m_Index
End Get
End Property
End Class
End Class 2 12508
Hi,
I usually make my combobox ownerdrawn when I have to format the
display members. Here is a link to making an ownerdrawn combobox http://www.windowsformsdatagridhelp....7-ecb5b73cbcae
Ken
-------------------------------
"AMDRIT" <am****@hotmail .com> wrote in message
news:Oc******** *****@TK2MSFTNG P15.phx.gbl... Hello Everyone,
I would like to format the Display Members of a combobox's datasource. Is there a way to apply a format without subclassing the original datasource? For example, given a list of decimal values, format them as currency values with a leading currency symbol and 2 decimal places.
TIA
Class Test
Dim SelectionList As ArrayList Dim cbo As ComboBox
Public Sub New() SelectionList = New ArrayList SelectionList.A ddRange(New DataElements() {New DataElements(1D , 1), New DataElements(1. 15D, 2), New DataElements(1. 3D, 3)})
cbo = New ComboBox cbo.DataSource = SelectionList cbo.DisplayMemb er = "Value" cbo.ValueMember = "Index"
End Sub
Public Class DataElements Private m_Value As Decimal Private m_Index As Integer
Public Sub New(ByVal Value As Decimal, ByVal Index As Integer) m_Value = Value m_Index = Index End Sub
Public ReadOnly Property Value() As Decimal Get Return m_Value End Get End Property
Public ReadOnly Property Index() As Integer Get Return m_Index End Get End Property
End Class
End Class
Ken,
Thank you very much. Your link was enough to get me to think in the correct
direction.
Private Sub cboComp_DrawIte m(ByVal sender As Object, ByVal e As
System.Windows. Forms.DrawItemE ventArgs) Handles cboComp.DrawIte m
' Formats the display value of a combobox as
' a currency value.
'
' Assumptions: All display values are numeric
'
'set the combo box drawmode = OwnerdrawVariab le
If e.Index = -1 Then Exit Sub
Dim strDisplayValue As String
'Seems there are layers in everything these days.
e.DrawBackgroun d()
'I am bound to an array of datarows, using cbo.datasource =
datatable.selec t("MyKey = SomeNumber")
'this handler will always treat the displayvalues as decimal and format
them as string currency
strDisplayValue = CType(CType(cbo Comp.DataSource ,
DataRow())(e.In dex)(cboComp.Di splayMember), Decimal).ToStri ng("c")
'Draw the data
'ToDo: Figure out how to right align using drawstring().
e.Graphics.Draw String(strDispl ayValue, cboComp.Font,
System.Drawing. Brushes.Black, New RectangleF(e.Bo unds.X, e.Bounds.Y,
e.Bounds.Width, e.Bounds.Height ))
'More layers
e.DrawFocusRect angle()
End Sub
"Ken Tucker [MVP]" <vb***@bellsout h.net> wrote in message
news:O9******** ******@TK2MSFTN GP14.phx.gbl... Hi,
I usually make my combobox ownerdrawn when I have to format the display members. Here is a link to making an ownerdrawn combobox
http://www.windowsformsdatagridhelp....7-ecb5b73cbcae
Ken ------------------------------- "AMDRIT" <am****@hotmail .com> wrote in message news:Oc******** *****@TK2MSFTNG P15.phx.gbl... Hello Everyone,
I would like to format the Display Members of a combobox's datasource. Is there a way to apply a format without subclassing the original datasource? For example, given a list of decimal values, format them as currency values with a leading currency symbol and 2 decimal places.
TIA
Class Test
Dim SelectionList As ArrayList Dim cbo As ComboBox
Public Sub New() SelectionList = New ArrayList SelectionList.A ddRange(New DataElements() {New DataElements(1D , 1), New DataElements(1. 15D, 2), New DataElements(1. 3D, 3)})
cbo = New ComboBox cbo.DataSource = SelectionList cbo.DisplayMemb er = "Value" cbo.ValueMember = "Index"
End Sub
Public Class DataElements Private m_Value As Decimal Private m_Index As Integer
Public Sub New(ByVal Value As Decimal, ByVal Index As Integer) m_Value = Value m_Index = Index End Sub
Public ReadOnly Property Value() As Decimal Get Return m_Value End Get End Property
Public ReadOnly Property Index() As Integer Get Return m_Index End Get End Property
End Class
End Class
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