js使用ajax传值给后台,后台返回字符串处理方法

<code class="language-html"><input type="text" id="iusername" runat="server" onblur="tbox_click()"/> <input id="inadd" runat="server" type="text" /> <input id="intel" runat="server" type="text" /></code> 

<script>  function tbox_click() {   var cc = document.getElementById("iusername").value;   var jsonob = {tbname:cc};   $.ajax({    type: "Post",    url: "tc.aspx/Tbclick",    contentType: "application/json; charset=utf-8",    dataType: "text",    data: JSON.stringify(jsonob),    success: function (data) {     var a = eval("(" + data + ")");     var al = a.d;     if (al == "namenull") {      alert("The user name does not exist. Please re-enter it(该用户名不存在，请重新输入)");      return;     }     if (al == "null") {      alert("Please input OBTUsername(请输入用户名)");      return;     }     //alert(a.d);     var myd = new Array();     myd = a.d.split("|");     $("#intel").val(myd[0]);     $("#inadd").val(myd[1]);    },    error: function (e) {     alert(e.message);    }   });  } </script>

[WebMethod]  public static string Tbclick(string tbname)  {   if (tbname.Trim() == "")   {    return "null";   }   var user = new User(tbname.Trim());//这个是根据tbname从数据库中获取信息的方法，可以自行填写   if (user.userName == null)   {    return "namenull";   }   string jsonText = user.mobile+"|"+user.address;    return jsonText;  }

var aa = eval("(" + data.d + ")");alert(aa);

var a = eval("(" + data + ")");alert(a.d);