I have a DataGridView that has some columns marked as ReadOnly. I
don't want the user to be able to enter the ReadOnly columns.
(Significantly speeds up data entry.) Instead I want when they leave a
field or enter a ReadOnly field that the focus skip to the next non-
ReadOnly field.
Here is the problem code:
Private Sub OpenItemsGrid_CellEnter(ByVal sender As Object, ByVal e
As System.Windows.Forms.DataGridViewCellEventArgs) Handles
DataGridView_OpenItems.CellEnter
If Not bInitializing AndAlso DataGridView_OpenItems.CurrentCell
IsNot Nothing AndAlso DataGridView_OpenItems.CurrentCell.ReadOnly Then
Try
SendKeys.Send("{TAB}")
Catch ex As NullReferenceException
' Suppress the error
Catch ex As Exception
WriteException(ex)
End Try
End If
End Sub
The problem: SendKeys.Send("{TAB}") line is regularly throwing a
NullReferenceException and complains that "Object reference not set to
an instance of an object."
I can't set the DataGridView.CurrentCell property because it trips an
InvalidOperationException, "Operation is not valid because it results
in a reentrant call to the SetCurrentCellAddressCore function."
Anyone have a suggestion on how I can get the behavior I want?
- R.B. Davidson.
