ScrollableControl.OnPaintBackground(PaintEventArgs) ScrollableControl.OnPaintBackground(PaintEventArgs) ScrollableControl.OnPaintBackground(PaintEventArgs) ScrollableControl.OnPaintBackground(PaintEventArgs) Method

定义

绘制控件的背景。Paints the background of the control.

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

参数

e
PaintEventArgs PaintEventArgs PaintEventArgs PaintEventArgs

包含事件数据的 PaintEventArgsA PaintEventArgs that contains the event data.

注解

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.

OnPaintBackground 方法还允许派生类对事件进行处理而不必附加委托。The OnPaintBackground 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

当在OnPaintBackground(PaintEventArgs)派生类中重写时, 请确保调用基类的OnPaintBackground(PaintEventArgs)方法, 以便注册的委托接收事件。When overriding OnPaintBackground(PaintEventArgs) in a derived class, be sure to call the base class' OnPaintBackground(PaintEventArgs) method so that registered delegates receive the event.

适用于