WPF TextBox Intercepting RoutedUICommands

Question

I am trying to get Undo/Redo keyboard shortcuts working in my WPF application (I have my own custom functionality implemented using the Command Pattern). It seems, however, tha

Answer 1

The TextBox control provides an IsUndoEnabled property that you can set to false to prevent the Undo feature. (If IsUndoEnabled is true, the Ctrl + Z keystroke triggers it.)

Also for a control that does not provide a special property you can add a new binding for the command you want to disable. This binding can then supply a new CanExecute event handler that always responds false. Here’s an example that uses this technique to remove support for the Cut feature of the text box:

CommandBinding commandBinding = new CommandBinding(
ApplicationCommands.Cut, null, SuppressCommand);
txt.CommandBindings.Add(commandBinding);

and here’s the event handler that sets the CanExecute state:

private void SuppressCommand(object sender, CanExecuteRoutedEventArgs e)
{
  e.CanExecute = false;
  e.Handled = true;
}