Control.OnInvalidated(InvalidateEventArgs) 方法

定义

引发 Invalidated 事件。Raises the Invalidated event.

protected:
 virtual void OnInvalidated(System::Windows::Forms::InvalidateEventArgs ^ e);
protected virtual void OnInvalidated (System.Windows.Forms.InvalidateEventArgs e);
abstract member OnInvalidated : System.Windows.Forms.InvalidateEventArgs -> unit
override this.OnInvalidated : System.Windows.Forms.InvalidateEventArgs -> unit
Protected Overridable Sub OnInvalidated (e As InvalidateEventArgs)

参数

e
InvalidateEventArgs

包含事件数据的 InvalidateEventArgsAn InvalidateEventArgs 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.

OnInvalidated 方法还允许派生类对事件进行处理而不必附加委托。The OnInvalidated 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 OnInvalidated(InvalidateEventArgs) 时,一定要调用基类的 OnInvalidated(InvalidateEventArgs) 方法,以便已注册的委托对事件进行接收。When overriding OnInvalidated(InvalidateEventArgs) in a derived class, be sure to call the base class's OnInvalidated(InvalidateEventArgs) method so that registered delegates receive the event.

适用于

另请参阅