.net后台添加asp.net控件，我这样子写出错

    string[]  str2=dt.Rows[0]["timu"].ToString().Split('|');
    string[]  str1=dt.Rows[0]["selectxx"].ToString().Split('_');
    string str = "";
    for (int i = 0; i < str2.Length; i++)
    {
        string[] arr = str1[i].ToString().Split(',');
        str += "<asp:Panel  Visible=\'true\' runat=\'server\'>";
        str += " <asp:Label runat=\'server\' text=\'" + str2[i].ToString() + "\'><\asp:Label>;";
        str += "  <\asp:RadioButtonList ID=\'rbl1\' runat=\'server\' RepeatDirection=\'Horizontal\'>";
        for (int m = 0; m < arr.Length; m++)
        {
            str += "<asp:ListItem>" + arr[m].ToString() + "</asp:ListItem>";
        }
        str += "</asp:RadioButtonList><br />";
        str += " 建议：<br /> <asp:TextBox ID=\'jy1\' TextMode=\'MultiLine\' Width=\'600px\' runat=\'server\' Height=\'84px\'></asp:TextBox></asp:Panel>  <br />";
        //str += "<tr><td</td></tr>";
    }
   this.rst.InnerHtml=str;

javascript之DOM操作