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

定义

引发 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)

参数

e
KeyEventArgs KeyEventArgs KeyEventArgs KeyEventArgs

包含事件数据的 KeyEventArgsA KeyEventArgs that contains the event data.

注解

默认情况下, OnKeyDown当按下向下箭头键时,事件处理程序允许用户向下移动拆分器。By default, the OnKeyDown event handler allows the user to move the splitter down when the DOWN arrow key is pressed. 该事件处理程序还会SplitterRectangle绘制,以便在移动拆分器时显示拆分器的当前位置。 OnKeyDownThe OnKeyDown event handler also draws the SplitterRectangle to show the current position of the splitter while it is moving.

引发事件时,将通过委托调用事件处理程序。Raising an event invokes the event handler through a delegate. 有关详细信息, 请参阅处理和引发事件For more information, see Handling and Raising Events.

OnKeyDown 方法还允许派生类对事件进行处理而不必附加委托。The OnKeyDown method also allows derived classes to handle the event without attaching a delegate. 这是在派生类中处理事件的首选技术。This is the preferred technique for handling the event in a derived class.

继承者说明

在派生类中重写 OnKeyDown(KeyEventArgs) 时,一定要调用基类的 OnKeyDown(KeyEventArgs) 方法,以便已注册的委托对事件进行接收。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.

适用于

另请参阅