ToolStrip.OnBeginDrag(EventArgs) ToolStrip.OnBeginDrag(EventArgs) ToolStrip.OnBeginDrag(EventArgs) ToolStrip.OnBeginDrag(EventArgs) Method

定义

引发 BeginDrag 事件。Raises the BeginDrag event.

protected:
 virtual void OnBeginDrag(EventArgs ^ e);
protected virtual void OnBeginDrag (EventArgs e);
abstract member OnBeginDrag : EventArgs -> unit
override this.OnBeginDrag : EventArgs -> unit
Protected Overridable Sub OnBeginDrag (e As EventArgs)

参数

e
EventArgs EventArgs EventArgs EventArgs

包含事件数据的 EventArgsAn EventArgs that contains the event data.

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.

OnBeginDrag 方法还允许派生类对事件进行处理而不必附加委托。The OnBeginDrag 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

在派生类中重写 OnBeginDrag(EventArgs) 时,一定要调用基类的 OnBeginDrag(EventArgs) 方法,以便已注册的委托对事件进行接收。When overriding OnBeginDrag(EventArgs) in a derived class, be sure to call the base class's OnBeginDrag(EventArgs) method so that registered delegates receive the event.

适用于