ProgressBar.OnBackColorChanged(EventArgs) 方法

定義

引發 BackColorChanged 事件。Raises the BackColorChanged event.

protected:
 override void OnBackColorChanged(EventArgs ^ e);
protected override void OnBackColorChanged (EventArgs e);
override this.OnBackColorChanged : EventArgs -> unit
Protected Overrides Sub OnBackColorChanged (e As EventArgs)

參數

e
EventArgs

EventArgs,其中包含事件資料。A EventArgs that contains the event data.

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.

OnBackColorChanged 方法也允許衍生類別處理事件,而不用附加委派。The OnBackColorChanged 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

OnBackColorChanged(EventArgs)在衍生類別中覆寫時,請務必呼叫基類的方法, OnBackColorChanged(EventArgs) 以便註冊的委派會接收事件。When overriding OnBackColorChanged(EventArgs) in a derived class, be sure to call the base class' OnBackColorChanged(EventArgs) method so that registered delegates receive the event.

適用於