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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)
XML Namespace:

public event CanExecuteRoutedEventHandler PreviewCanExecute
/** @event */
public void add_PreviewCanExecute (CanExecuteRoutedEventHandler value)

/** @event */
public void remove_PreviewCanExecute (CanExecuteRoutedEventHandler value)

In JScript, you can handle the events defined by a class, but you cannot define your own.
<object PreviewCanExecute="CanExecuteRoutedEventHandler" .../>

Identifier field


Routing strategy




When the CanExecute on a a RoutedCommand, 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.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0