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UIElement.PreviewMouseLeftButtonUp, événement

Occurs when the left mouse button is released while the mouse pointer is over this element.

Espace de noms: System.Windows
Assembly : PresentationCore (dans presentationcore.dll)
Espace de noms XML :  http://schemas.microsoft.com/winfx/2006/xaml/presentation

public event MouseButtonEventHandler PreviewMouseLeftButtonUp
/** @event */
public final void add_PreviewMouseLeftButtonUp (MouseButtonEventHandler value)

/** @event */
public final void remove_PreviewMouseLeftButtonUp (MouseButtonEventHandler value)

En JScript, vous pouvez gérer les événements définis par une classe, mais vous ne pouvez pas définir les vôtres.
<object PreviewMouseLeftButtonUp="MouseButtonEventHandler" .../>

Identifier field

PreviewMouseLeftButtonUpEvent

Routing strategy

Direct

Delegate

MouseButtonEventHandler

Although this routed event seems to follow a tunneling route through an element tree, it actually is a direct routed event that is raised and reraised along the element tree by each UIElement.

This event is one of several related events that report the mouse-button specifics of an underlying Mouse.PreviewMouseUp event, which is an attached event that is processed by each element along an event route.

The event data of this event exposes the event data of the underlying Mouse.PreviewMouseUp event. If that event is marked as handled along the event route, the mouse-button specific events are still raised; however, handlers of the mouse-button specific events must be added by explicitly calling AddHandler, with the option to handle events that are already marked as handled, in order to be listeners to the event. If you mark PreviewMouseLeftButtonUp handled, you are essentially marking Mouse.PreviewMouseUp handled for all further listeners along the route, and on all related events.

Conceptually, think of this event (and other mouse-button events on UIElement) to be a mouse "service" (with the service definition provided by the Mouse class). The event adds the convenience of not needing to check the mouse button states (left-right, up-down) of the original mouse events in the event data. For more advanced scenarios, such as checking for states of non-standard buttons, you might need to use the APIs on the Mouse class rather than those on UIElement.

Microsoft .NET Framework 3.0 est pris en charge sur Windows Vista, Microsoft Windows XP SP2 et Windows Server 2003 SP1.

.NET Framework

Prise en charge dans : 3.0
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