CommandBinding::PreviewCanExecute Event


Occurs when the command associated with this CommandBinding initiates a check to determine whether the command can be executed on the current command target.

Namespace:   System.Windows.Input
Assembly:  PresentationCore (in PresentationCore.dll)

event CanExecuteRoutedEventHandler^ PreviewCanExecute {
	void add(CanExecuteRoutedEventHandler^ value);
	void remove(CanExecuteRoutedEventHandler^ value);

When the CanExecute method on a RoutedCommand is called, the PreviewCanExecute event is raised on the command target if the command target has a CommandBinding for the command. Then the CanExecute handler for that CommandBinding is called. If the command target does not have a CommandBinding for the command, the CanExecute event bubbles up the element tree searching for an element that has a CommandBinding associated with the command. If the event is not handled, the CanExecute event is raised.

Identifier field


Routing strategy




.NET Framework
Available since 3.0
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