if(request["strclass"] != null
    string _strclass =request["strclass"] 
    string _strkey = request["strkey "]
    switch(_strclass)
    {
     case "qq":
        qq.text=strkey 
breark;
     case "taobao":
        taobao.text=strkey 
breark;
     case "url":
        url.text=strkey 
breark;


    }

------解决方案--------------------
悲剧，还有这样传值的？

应该这样传 Admin_AddUser.aspx?QQ=123123123123&TAOBAO=kk




------解决方案--------------------
string strclass= Request.QueryString["strclass"]==null?"":Request.QueryString["strclass"];
string strkey= Request.QueryString["strkey"]null?"":Request.QueryString["strkey"];

注意非空判断

------解决方案--------------------
探讨


string strclass= Request.QueryString["strclass"]==null?"":Request.QueryString["strclass"];
string strkey= Request.QueryString["strkey"]null?"":Request.QueryString["strkey"];

注意非空判断


------解决方案--------------------
1楼正解！