Editing DataGridTextBoxColumn

Posted on 2006-06-05
Medium Priority
Last Modified: 2012-08-13
I am trying to edit a DataGridTextBoxColumn derivated classe and i'm having problem with currency manager. The class has the function SetColumnValueAtRow, which takes 3 paramaters (CurrencyManager, index, value).

Currency Manager is usualy passed as argument since every sub are derivated from the DataGridTextBoxColumn, so any idea how i could set a value un this textbox column ?
Question by:TheSonics
  • 2
LVL 96

Expert Comment

by:Bob Learned
ID: 16841488
This is the way that the base DataGridTextBoxColumn.SetColumnValueAtRow does it:

Protected Friend Overridable Sub SetColumnValueAtRow(ByVal source As CurrencyManager, ByVal rowNum As Integer, ByVal value As Object)
      If (source.Position <> rowNum) Then
            Throw New ArgumentException(SR.GetString("DataGridColumnListManagerPosition"), "rowNum")
      End If
      If TypeOf source.Item(rowNum) Is IEditableObject Then
            DirectCast(source.Item(rowNum), IEditableObject).BeginEdit
      End If
      Me.PropertyDescriptor.SetValue(source.Item(rowNum), value)
End Sub


Author Comment

ID: 16842872
source is not accessible since it is private. same for the PropertyDescriptor
LVL 96

Accepted Solution

Bob Learned earned 2000 total points
ID: 16843220
I am sorry, I didn't try it first.  Here is a modified, untest example without compiler errors:

  Protected Overrides Sub SetColumnValueAtRow(ByVal source As CurrencyManager, ByVal rowNum As Integer, ByVal value As Object)
    If (source.Position <> rowNum) Then
      Throw New ArgumentException("Row doesn't match current position")
    End If
    If TypeOf source.List(rowNum) Is IEditableObject Then
      DirectCast(source.List(rowNum), IEditableObject).BeginEdit()
    End If
    CType(Me, DataGridColumnStyle).PropertyDescriptor.SetValue(source.List(rowNum), value)
  End Sub


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