Control.OnGotFocus(EventArgs) 方法
定義
protected:
virtual void OnGotFocus(EventArgs ^ e);
protected virtual void OnGotFocus (EventArgs e);
abstract member OnGotFocus : EventArgs -> unit
override this.OnGotFocus : EventArgs -> unit
Protected Overridable Sub OnGotFocus (e As EventArgs)
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.
OnGotFocus 方法也允許衍生類別處理事件,而不用附加委派。The OnGotFocus 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 OnGotFocus(EventArgs) 時,請確定呼叫基底類別的 OnGotFocus(EventArgs) 方法,使已註冊的委派能接收到事件。When overriding OnGotFocus(EventArgs) in a derived class, be sure to call the base class's OnGotFocus(EventArgs) method so that registered delegates receive the event.