DetailsView.OnPreRender(EventArgs) 方法

定义

引发 PreRender 事件。Raises the PreRender event.

protected public:
 override void OnPreRender(EventArgs ^ e);
protected internal override void OnPreRender (EventArgs e);
override this.OnPreRender : EventArgs -> unit
Protected Friend Overrides Sub OnPreRender (e As EventArgs)

参数

e
EventArgs

包含事件数据的 EventArgsAn EventArgs that contains the event data.

注解

此方法通知服务器控件在保存视图状态和呈现内容之前执行任何必需的预呈现步骤。在扩展DetailsView类时, 控件开发人员通常会使用此方法。This method notifies the server control to perform any necessary prerendering steps prior to saving view state and rendering content .It is generally used by control developers when extending the DetailsView class.

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

适用于

另请参阅