ToolStripComboBox.OnTextUpdate(EventArgs) 方法

定義

引發 TextUpdate 事件。Raises the TextUpdate event.

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

參數

e
EventArgs

包含事件資料的 EventArgsAn 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.

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

覆寫衍生類別中的 OnTextUpdate(EventArgs) 時,請務必呼叫基類的 OnTextUpdate(EventArgs) 方法,讓已註冊的委派能接收事件。When overriding OnTextUpdate(EventArgs) in a derived class, be sure to call the base class’s OnTextUpdate(EventArgs) method so that registered delegates receive the event.

適用於