Combo Box in .Net Data Grid

[surf2mail@gmail.com]

To anyone trying to solve the dropdown combo box navigation in a .net
grid problem, here is one solution - hey, it works:

We neet to trap key down and up (arrow) events and use them to
navigate the combo box rather than navigate the grid. Don't want to
be forced to use the mouse to navigate the combo box. So here is the
solution:

Create the following class which inherits the Combo box.


Public Class NoKeyUpCombo
Inherits ComboBox
Private WM_KEYUP As Integer = &H101
Const WM_KEYDOWN As Integer = &H100

Protected Overrides Function ProcessCmdKey(B yRef msg As Message,
ByVal keyData As Keys) As Boolean
need this function to be able to capture the Down/Up arrow
keys
''prevents the cell from changing so we can navigate the combo
box
Dim currentCell As DataGridCell
Dim iSel As Int16
Dim iMax As Int16
'System.Diagnos tics.Debug.Writ e(keyData)
'System.Diagnos tics.Debug.Writ e(keyData.ToStr ing)
If Me.Items.Count < 1 Then
Return True
End If
Try
If keyData.ToStrin g = "Down" Then
iMax = Me.Items.Count
If Me.SelectedInde x < iMax - 1 Then
iSel = Me.SelectedInde x + 1
Me.SelectedInde x = iSel
End If
End If
If keyData.ToStrin g = "Up" And Me.SelectedInde x 0 Then
iSel = Me.SelectedInde x - 1
Me.SelectedInde x = iSel
End If
Catch ex As Exception
'Throw ex
Me.SelectedInde x = -1

End Try
End Function

Protected Overrides Sub WndProc(ByRef m As
System.Windows. Forms.Message)
If m.Msg = WM_KEYUP Or m.Msg = WM_KEYDOWN Then
'ignore keyup/down to avoid problem with tabbing &
dropdownlist;


Return
End If

MyBase.WndProc( m)

End Sub 'WndProc


End Class 'NoKeyUpCombo

'''hope this helps, -Peter