DataTable: ColumnChanged event always fired

[Anthony]

Hi,

When I update a datatable through a datagrid the ColumnChanged event
is fired. In this event I check if the new value that the user has
entered is correct and change it if it's not. My problem is when I
change it, the ColumnEvent is fired again. How can I prevent this? I
thought BeginEdit would do the trick but it doesn't seem to work.

I thought of using 'RemoveHandler' and 'AddHandler' but I'm fairly
sure there is a proper solution.

Any suggestions?

Anthony.

Simplified code (if I put 'e.Row.BeginEdit()' or not, it doesn't make
any difference):

Private Sub MyDataTable_ColumnChanged(ByVal sender As Object,
ByVal e As System.Data.DataColumnChangeEventArgs) Handles
MyDataTable.ColumnChanged
If e.Column.ColumnName = "Col1" Then
If e.ProposedValue.ToString.Trim.Length > 0 Then
If e.ProposedValue = "test" Then
e.Row.BeginEdit()
e.Row("Col1") = "test2" 'This fires the event
again
e.Row.EndEdit()
End If
Else
e.Row.CancelEdit()
End If
End If
End Sub

 

[Cor Ligthert]

Hi Anthony,

Why not only make a togle boolean swicth in that procedure

If it is true, it comes back and you can than only set it to false and after
that exit the procedure.

Cor