UIElement.PreviewDragLeave 事件

定義

輸入系統報告其下以此項目作為拖曳來源的拖曳事件時發生。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 

事件類型

DragEventHandler

備註

此事件 DragDrop.PreviewDragLeave 會為這個類別建立附加事件的別名,因此 PreviewDragLeaveUIElement 繼承為基底專案時,它就是類別成員清單的一部分。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. 附加至事件的事件處理常式 PreviewDragLeave 會附加至基礎 DragDrop.PreviewDragLeave 附加事件,並接收相同的事件資料實例。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.

路由事件資訊Routed Event Information

識別碼欄位Identifier field PreviewDragLeaveEvent
路由策略Routing strategy 隧道Tunneling
代理人Delegate DragEventHandler

適用於