Control.OnInvalidated(InvalidateEventArgs) Control.OnInvalidated(InvalidateEventArgs) Control.OnInvalidated(InvalidateEventArgs) Control.OnInvalidated(InvalidateEventArgs) Method

定義

引發 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)

參數

備註

引發事件會透過委派叫用此事件處理常式。Raising an event invokes the event handler through a delegate. 如需詳細資訊, 請參閱處理和引發事件For more information, see Handling and Raising Events.

OnInvalidated 方法也允許衍生類別處理事件,而不用附加委派。The OnInvalidated method also allows derived classes to handle the event without attaching a delegate. 這是在衍生類別中處理事件的慣用技巧。This is the preferred technique for handling the event in a derived class.

給繼承者的注意事項

當在衍生類別中覆寫 OnInvalidated(InvalidateEventArgs) 時,請確定呼叫基底類別的 OnInvalidated(InvalidateEventArgs) 方法,使已註冊的委派能接收到事件。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.

適用於

另請參閱