前台代码：
C# code:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="tttt.aspx.cs" Inherits="tttt" %>
<%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
Namespace="System.Web.UI" TagPrefix="asp" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div><div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
</div>
<asp:UpdatePanel id="UpdatePanel1" runat="server"><contenttemplate>
<asp:RadioButtonList id="RBL_content" runat="server" BorderStyle="Dashed" BorderColor="#004040" BorderWidth="1px" RepeatColumns="8">
<asp:ListItem>test</asp:ListItem>
</asp:RadioButtonList>
<
