ToolStripComboBox.OnSelectionChangeCommitted(EventArgs) 方法


引發 SelectionChangeCommitted 事件。Raises the SelectionChangeCommitted event.

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



包含事件資料的 EventArgsAn EventArgs that contains the event data.


只有當使用者變更下拉式方塊選取專案時,才會引發 SelectionChangeCommittedSelectionChangeCommitted is raised only when the user changes the combo box selection. 請勿使用 SelectedIndexChangedSelectedValueChanged 來捕捉使用者變更,因為當選取專案以程式設計方式變更時,也會引發這些事件。Do not use SelectedIndexChanged or SelectedValueChanged to capture user changes, because those events are also raised when the selection changes programmatically. 當您設定 SelectedIndex時,也會引發此事件。This event is also raised when you set SelectedIndex.

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.

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


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