SplitContainer.OnKeyDown(KeyEventArgs) SplitContainer.OnKeyDown(KeyEventArgs) SplitContainer.OnKeyDown(KeyEventArgs) SplitContainer.OnKeyDown(KeyEventArgs) Method

定義

引發 KeyDown 事件。Raises the KeyDown event.

protected:
 override void OnKeyDown(System::Windows::Forms::KeyEventArgs ^ e);
protected override void OnKeyDown (System.Windows.Forms.KeyEventArgs e);
override this.OnKeyDown : System.Windows.Forms.KeyEventArgs -> unit
Protected Overrides Sub OnKeyDown (e As KeyEventArgs)

參數

e
KeyEventArgs KeyEventArgs KeyEventArgs KeyEventArgs

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

備註

根據預設,當OnKeyDown按下方向鍵時,事件處理常式可讓使用者將分隔器向下移動。By default, the OnKeyDown event handler allows the user to move the splitter down when the DOWN arrow key is pressed. 事件處理常式也會在SplitterRectangle移動時,繪製以顯示分割器的目前位置。 OnKeyDownThe OnKeyDown event handler also draws the SplitterRectangle to show the current position of the splitter while it is moving.

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.

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

適用於

另請參閱