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)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

public:
 event CanExecuteRoutedEventHandler^ PreviewCanExecute {
	void add (CanExecuteRoutedEventHandler^ value);
	void remove (CanExecuteRoutedEventHandler^ value);
}
<object PreviewCanExecute="CanExecuteRoutedEventHandler" .../>

Identifier field

PreviewCanExecuteEvent

Routing strategy

Tunneling

Delegate

CanExecuteRoutedEventHandler

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.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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