If I have understood your requirement correctly, I believe that there is an easier approach. You can subscribe to PreviewKeyDown and handle it for cells that do not match the condition:
private void clubsGrid_PreviewKeyDown(object sender, KeyEventArgs e)
var cell = e.OriginalSource as GridViewCell;
if (cell != null && cell.Column.DisplayIndex == 2 && e.Key == Key.A)
e.Handled = true;
For example, this code prevents the input of "A" in the third column. If the raising of KeyDown is prevented, TextInput will not be raised.
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items