UIElement.PreviewDragLeave 事件

定义

在输入系统报告出现以此元素为拖动起点的基础拖动事件时发生。Occurs when the input system reports an underlying drag event with this element as the drag origin.

public:
 event System::Windows::DragEventHandler ^ PreviewDragLeave;
public event System.Windows.DragEventHandler PreviewDragLeave;
member this.PreviewDragLeave : System.Windows.DragEventHandler 
Public Custom Event PreviewDragLeave As DragEventHandler 

事件类型

DragEventHandler

注解

此事件将为 DragDrop.PreviewDragLeave 此类创建附加事件的别名,因此 PreviewDragLeaveUIElement 继承为基元素时,它是类成员列表的一部分。This event creates an alias for the DragDrop.PreviewDragLeave attached event for this class, so that PreviewDragLeave is part of the class members list when UIElement is inherited as a base element. 附加到事件的事件处理程序 PreviewDragLeave 附加到基础 DragDrop.PreviewDragLeave 附加事件,并接收相同的事件数据实例。Event handlers that are attached to the PreviewDragLeave event are attached to the underlying DragDrop.PreviewDragLeave attached event and receive the same event data instance.

路由事件信息Routed Event Information

标识符字段Identifier field PreviewDragLeaveEvent
路由策略Routing strategy 隧道Tunneling
委托Delegate DragEventHandler

适用于