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Datagrid cell change event? Where to find event.

I have a datagrid and would like to know what even fires when a cell is
changed?

I want to know when the user changes a cell and moves to the next. I have
some code that needs to be done to make sure entry is valid?
Thanks,

Rog
Nov 21 '05 #1
4 10709


copied from one of my projects

Private Sub dgModel_Current CellChanged(ByV al sender As Object, ByVal e As
System.EventArg s) Handles dgModel.Current CellChanged

dgStyleSelectio n(dgModel, dgModel.Current Cell.RowNumber( ))

End Sub
so you use the "CurrentCellCha nged" event (this fires by mouse and
keyboard )

M. Posseth

"Roger" <da*****@netins .net> wrote in message
news:eA******** ******@tk2msftn gp13.phx.gbl...
I have a datagrid and would like to know what even fires when a cell is
changed?

I want to know when the user changes a cell and moves to the next. I have
some code that needs to be done to make sure entry is valid?
Thanks,

Rog

Nov 21 '05 #2
M,

This shows me that the cell changed, but gives me the new coordinates not
the current coordinates. I would like to validate the data entered into the
cell before leaving.

Roger
"M. Posseth" <mi*****@nohaus ystems.nl> wrote in message
news:d2******** **@reader10.wxs .nl...


copied from one of my projects

Private Sub dgModel_Current CellChanged(ByV al sender As Object, ByVal e As
System.EventArg s) Handles dgModel.Current CellChanged

dgStyleSelectio n(dgModel, dgModel.Current Cell.RowNumber( ))

End Sub
so you use the "CurrentCellCha nged" event (this fires by mouse and
keyboard )

M. Posseth

"Roger" <da*****@netins .net> wrote in message
news:eA******** ******@tk2msftn gp13.phx.gbl...
I have a datagrid and would like to know what even fires when a cell is
changed?

I want to know when the user changes a cell and moves to the next. I have some code that needs to be done to make sure entry is valid?
Thanks,

Rog


Nov 21 '05 #3
Roger,

I think, that you can use a datagridtextbox in a datagridtextbox column.
From that you can than use the validating event.

I never used it in this way.

A sample I once made with a tooltip
\\\
Private WithEvents dtbCol1 As DataGridTextBox
Private ToolTip1 As New ToolTip
')
Private Sub Form1_Load(ByVa l sender As Object, _
ByVal e As System.EventArg s) Handles MyBase.Load
Datagrid1.ReadO nly = True
Dim ts As New DataGridTableSt yle
ts.MappingName = ds.Tables(0).Ta bleName
Dim column As New DataGridTextBox Column
ts.GridColumnSt yles.Add(column )
DataGrid1.Table Styles.Add(ts)
column = DirectCast(ts.G ridColumnStyles (0), DataGridTextBox Column)
dtbCol1 = DirectCast(colu mn.TextBox, DataGridTextBox )
column.MappingN ame = ds.Tables(0).Co lumns(0).Column Name
column.HeaderTe xt = "Cor"
column.Width = 30
dv = New DataView(ds.Tab les(0))
dv.AllowNew = False
DataGrid1.DataS ource = dv
End Sub
Private Sub dtbCol1_ToolTip (ByVal sender As Object, _
ByVal e As System.EventArg s) Handles dtbCol1.MouseEn ter
ToolTip1.SetToo lTip(DirectCast (sender, DataGridTextBox ), _
"Row: " & DataGrid1.Curre ntRowIndex + 1)
End Sub
///

I hope this helps,

Cor
Nov 21 '05 #4
aha

well you could declare a static variabel and read the previous cell values
with it ( i am famous for my simplistic solutions :-) )

or

There are two types of input validation available for the Windows Forms
DataGrid control. If the user attempts to enter a value that is of an
unacceptable data type for the cell, for example a string into an integer,
the new invalid value is replaced with the old value. This kind of input
validation is done automatically and cannot be customized.
The other type of input validation can be used to reject any unacceptable
data, for example a zero value in a field that must be greater than or equal
to one, or an inappropriate string. This is done in the dataset by writing
an event handler for the DataTable.Colum nChanging or DataTable.RowCh anging
event. The example below uses the ColumnChanging event because the
unacceptable value is disallowed for the "Product" column in particular. You
might use the RowChanging event for checking that the value of an "End Date"
column is later than the "Start Date" column in the same row.

Private Sub Customers_Colum nChanging(ByVal sender As Object, _
ByVal e As System.Data.Dat aColumnChangeEv entArgs)
' Only check for errors in the Product column
If (e.Column.Colum nName.Equals("P roduct")) Then
' Do not allow "Automobile " as a product.
If CType(e.Propose dValue, String) = "Automobile " Then
Dim badValue As Object = e.ProposedValue
e.ProposedValue = "Bad Data"
e.Row.RowError = "The Product column contians an error"
e.Row.SetColumn Error(e.Column, "Product cannot be " & _
CType(badValue, String))
End If
End If
End Sub
' Assumes the grid is bound to a dataset called customersDataSe t1
' with a table called Customers.
' Put this code in the form's Load event or its constructor.
AddHandler customersDataSe t1.Tables("Cust omers").ColumnC hanging, AddressOf
Customers_Colum nChanging

i hope this answers your problem

happy coding :-)

Michel Posseth [MCP]


"Roger" <da*****@netins .net> wrote in message
news:%2******** ********@TK2MSF TNGP15.phx.gbl. ..
M,

This shows me that the cell changed, but gives me the new coordinates not
the current coordinates. I would like to validate the data entered into the cell before leaving.

Roger
"M. Posseth" <mi*****@nohaus ystems.nl> wrote in message
news:d2******** **@reader10.wxs .nl...


copied from one of my projects

Private Sub dgModel_Current CellChanged(ByV al sender As Object, ByVal e As
System.EventArg s) Handles dgModel.Current CellChanged

dgStyleSelectio n(dgModel, dgModel.Current Cell.RowNumber( ))

End Sub
so you use the "CurrentCellCha nged" event (this fires by mouse and
keyboard )

M. Posseth

"Roger" <da*****@netins .net> wrote in message
news:eA******** ******@tk2msftn gp13.phx.gbl...
I have a datagrid and would like to know what even fires when a cell is changed?

I want to know when the user changes a cell and moves to the next. I

have some code that needs to be done to make sure entry is valid?
Thanks,

Rog



Nov 21 '05 #5

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