Control.OnSizeChanged(EventArgs) 方法
定义
引发 SizeChanged 事件。Raises the SizeChanged event.
protected:
virtual void OnSizeChanged(EventArgs ^ e);
protected virtual void OnSizeChanged (EventArgs e);
abstract member OnSizeChanged : EventArgs -> unit
override this.OnSizeChanged : EventArgs -> unit
Protected Overridable Sub OnSizeChanged (e As EventArgs)
参数
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.
OnSizeChanged方法还使派生类可以处理事件,而无需附加委托。The OnSizeChanged method also enables 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 OnSizeChanged(EventArgs) 时,一定要调用基类的 OnSizeChanged(EventArgs) 方法,以便已注册的委托对事件进行接收。When overriding OnSizeChanged(EventArgs) in a derived class, be sure to call the base class's OnSizeChanged(EventArgs) method so that registered delegates receive the event.