Disabling a control to have built-in command support

  • Ideally, the control will provide a property that allows you to gracefully switch off the command support. This ensures that the control will remove the feature and adjust itself consistently. For example, 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.)

  • If that fails, 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.

  • The final option is to remove the input that triggers the command by using the InputBindings collections. For example, you could disable the Ctrl+C keystroke that triggers the Copy command in a TextBox by using code like this:
    KeyBinding keyBinding = new KeyBinding(ApplicationCommands.NotACommand, Key.C, ModifierKeys.Control);
txt.InputBindings.Add(keyBinding);

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