单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version  3.5.  You create two user controls named UserCtrlA.ascx and UserCtrlB.ascx. The user controls postback to the server.  You create a new Web page that has the following ASPX code.  You need to ensure that the user control that is displayed meets the following requirements: ¡¤It is recreated during postback  ¡¤It retains its state.  Which method should you add to the Web page?（）

单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version  3.5.  Your application has a user control named UserCtrl.ascx. You write the following code fragment to create a Web page named Default.aspx. You need to dynamically add the UserCtrl.ascx control between the lblHeader and lblFooter Label | English | Chinese | Japan | Korean | - 11 - Test Information Co., Ltd. All rights reserved. controls.  What should you do?（）

单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  Your application has a user control named UserCtrl.ascx. You write the following code fragment to create a Web page named Default.aspx.  You need to dynamically add the UserCtrl.ascx control between the lblHeader and lblFooter Label controls.  What should you do? （）