Occurs when the command associated with this CommandBinding initiates a check to determine whether the command can be executed on the command target.
Assembly: PresentationCore (in PresentationCore.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
When the CanExecute method on a RoutedCommand is called, the PreviewCanExecute event is raised on the command target. If the event is not handled, the event is raised. If the command target has a CommandBinding for the command, the handler for that CommandBinding is called. If the command target does not have a CommandBinding for the command, the event bubbles up the element tree searching for an element that has a CommandBinding associated with the command.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.