BaseDataList.OnSelectedIndexChanged(EventArgs) 方法

定义

引发 SelectedIndexChanged 控件的 BaseDataList 事件。Raises the SelectedIndexChanged event of a BaseDataList control.

protected:
 virtual void OnSelectedIndexChanged(EventArgs ^ e);
protected virtual void OnSelectedIndexChanged (EventArgs e);
abstract member OnSelectedIndexChanged : EventArgs -> unit
override this.OnSelectedIndexChanged : EventArgs -> unit
Protected Overridable Sub OnSelectedIndexChanged (e As EventArgs)

参数

e
EventArgs

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

注解

在向服务器发送数据的数据列表控件中选择了不同的项时,将引发 SelectedIndexChanged 事件。The SelectedIndexChanged event is raised when a different item is selected in a data listing control between posts to the server. 使用 OnSelectedIndexChanged 方法可以为事件创建自定义处理程序。The OnSelectedIndexChanged method allows you to create a custom handler for the event.

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.

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

适用于

另请参阅