Ensamblado: PresentationFramework (en presentationframework.dll)
Espacio de nombres XML: http://schemas.microsoft.com/winfx/2006/xaml/presentation
/** @event */ public void add_ContextMenuClosing (ContextMenuEventHandler value) /** @event */ public void remove_ContextMenuClosing (ContextMenuEventHandler value)
En JScript, se pueden controlar los eventos que define una clase, pero no se pueden definir unos propios.
To suppress closing context menus, handlers of the event should mark it as handled.
To use this event as an EventTrigger in a style, you must reference the underlying service's definition of the event:
<EventTrigger RoutedEvent="ContextMenuService.ContextMenuClosing"> <!-- storyboard here ... --> </EventTrigger>
(This usage is required because the event implementation on FrameworkElement that exposes the underlying service event does not map the ContextMenuClosing identifier such that you can use it as a trigger).
ContextMenu itself is a FrameworkElement derived class, but the ContextMenuClosing event will not be raised by a context menu directly. Instead, the event is raised from the element that "owns" the context menu as a property and is only raised when a user attempts to close a context menu in the UI. However it is possible for ContextMenu itself to have a ContextMenu property (a nested context menu). In this case the ContextMenu really does own the nested ContextMenu and might raise the event, with the source of the event being the nested context menu.
The ContextMenu class itself also has a similar event (Closed) but the Closed event does not provide you the opportunity to cancel the user action.