ToolStripRenderer.OnRenderLabelBackground(ToolStripItemRenderEventArgs) ToolStripRenderer.OnRenderLabelBackground(ToolStripItemRenderEventArgs) ToolStripRenderer.OnRenderLabelBackground(ToolStripItemRenderEventArgs) ToolStripRenderer.OnRenderLabelBackground(ToolStripItemRenderEventArgs) Method

定义

引发 RenderLabelBackground 事件。Raises the RenderLabelBackground event.

protected:
 virtual void OnRenderLabelBackground(System::Windows::Forms::ToolStripItemRenderEventArgs ^ e);
protected virtual void OnRenderLabelBackground (System.Windows.Forms.ToolStripItemRenderEventArgs e);
abstract member OnRenderLabelBackground : System.Windows.Forms.ToolStripItemRenderEventArgs -> unit
override this.OnRenderLabelBackground : System.Windows.Forms.ToolStripItemRenderEventArgs -> unit
Protected Overridable Sub OnRenderLabelBackground (e As ToolStripItemRenderEventArgs)

参数

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.

OnRenderLabelBackground 方法还允许派生类对事件进行处理而不必附加委托。The OnRenderLabelBackground 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 OnRenderLabelBackground(ToolStripItemRenderEventArgs) 时,一定要调用基类的 OnRenderLabelBackground(ToolStripItemRenderEventArgs) 方法,以便已注册的委托对事件进行接收。When overriding OnRenderLabelBackground(ToolStripItemRenderEventArgs) in a derived class, be sure to call the base class's OnRenderLabelBackground(ToolStripItemRenderEventArgs) method so that registered delegates receive the event.

适用于