ToolStripItem.OnAvailableChanged(EventArgs) ToolStripItem.OnAvailableChanged(EventArgs) ToolStripItem.OnAvailableChanged(EventArgs) ToolStripItem.OnAvailableChanged(EventArgs) Method

定义

引发 AvailableChanged 事件。Raises the AvailableChanged event.

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

OnAvailableChanged 方法还允许派生类对事件进行处理而不必附加委托。The OnAvailableChanged 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OnAvailableChanged(EventArgs)派生类中重写时,请确保调用基类的OnAvailableChanged(EventArgs)方法,以便注册的委托接收事件。When overriding OnAvailableChanged(EventArgs) in a derived class, be sure to call the base class' OnAvailableChanged(EventArgs) method so that registered delegates receive the event.

适用于