ToolStripItem.OnDragDrop(DragEventArgs) ToolStripItem.OnDragDrop(DragEventArgs) ToolStripItem.OnDragDrop(DragEventArgs) ToolStripItem.OnDragDrop(DragEventArgs) Method

定义

引发 DragDrop 事件。Raises the DragDrop event.

protected:
 virtual void OnDragDrop(System::Windows::Forms::DragEventArgs ^ dragEvent);
protected virtual void OnDragDrop (System.Windows.Forms.DragEventArgs dragEvent);
abstract member OnDragDrop : System.Windows.Forms.DragEventArgs -> unit
override this.OnDragDrop : System.Windows.Forms.DragEventArgs -> unit
Protected Overridable Sub OnDragDrop (dragEvent As DragEventArgs)

参数

dragEvent
DragEventArgs DragEventArgs DragEventArgs DragEventArgs

包含事件数据的 DragEventArgsA DragEventArgs that contains the event data.

实现

注解

引发事件时,将通过委托调用事件处理程序。Raising an event invokes the event handler through a delegate. 有关详细信息, 请参阅处理和引发事件For more information, see Handling and Raising Events.

OnDragDrop 方法还允许派生类对事件进行处理而不必附加委托。The OnDragDrop method also allows derived classes to handle the event without attaching a delegate. 这是在派生类中处理事件的首选技术。This is the preferred technique for handling the event in a derived class.

继承者说明

当在OnDragDrop(DragEventArgs)派生类中重写时, 请确保调用基类的OnDragDrop(DragEventArgs)方法, 以便注册的委托接收事件。When overriding OnDragDrop(DragEventArgs) in a derived class, be sure to call the base class' OnDragDrop(DragEventArgs) method so that registered delegates receive the event.

适用于