DragDrop.AddPreviewDragOverHandler(DependencyObject, DragEventHandler) 方法

定义

PreviewDragOver 事件处理程序添加到指定的依赖对象。Adds a PreviewDragOver event handler to a specified dependency object.

public:
 static void AddPreviewDragOverHandler(System::Windows::DependencyObject ^ element, System::Windows::DragEventHandler ^ handler);
public static void AddPreviewDragOverHandler (System.Windows.DependencyObject element, System.Windows.DragEventHandler handler);
static member AddPreviewDragOverHandler : System.Windows.DependencyObject * System.Windows.DragEventHandler -> unit
Public Shared Sub AddPreviewDragOverHandler (element As DependencyObject, handler As DragEventHandler)

参数

element
DependencyObject

要对其添加事件处理程序的依赖对象(UIElementContentElement)。The dependency object (a UIElement or ContentElement) to which to add the event handler.

handler
DragEventHandler

一个委托,用于引用要添加的处理程序方法。A delegate that references the handler method to be added.

注解

在元素的边界上拖动 n 个对象时,将发生 PreviewDragOver 事件。The PreviewDragOver event occurs when n object is dragged over the element's bounds.

此方法为 @no__t 0 事件的隧道版本添加处理程序。This method adds a handler for the tunneling version of the PreviewDragOver event. 若要为此事件的冒泡版本添加处理程序,请参阅 AddDragOverHandlerTo add a handler for the bubbling version of this event, see AddDragOverHandler.

适用于

另请参阅