Control.OnRegionChanged(EventArgs) 方法

定義

命名空間:
System.Windows.Forms
組件:
System.Windows.Forms.dll

引發 RegionChanged 事件。Raises the RegionChanged event.

protected:
 virtual void OnRegionChanged(EventArgs ^ e);
protected virtual void OnRegionChanged (EventArgs e);
abstract member OnRegionChanged : EventArgs -> unit
override this.OnRegionChanged : EventArgs -> unit
Protected Overridable Sub OnRegionChanged (e As EventArgs)

參數

e
EventArgs

包含事件資料的 EventArgs。An 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.

OnRegionChanged 方法也允許衍生類別處理事件，而不用附加委派。The OnRegionChanged 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 OnRegionChanged(EventArgs) 時，請確定呼叫基底類別的 OnRegionChanged(EventArgs) 方法，使已註冊的委派能接收到事件。When overriding OnRegionChanged(EventArgs) in a derived class, be sure to call the base class's OnRegionChanged(EventArgs) method so that registered delegates receive the event.

適用於