ext grid 分页问题，跪求高手进

最近在学EXT 我是.net + ext ，在做grid 分页时出了问题，不知问题出哪了。就是不显示数据
报了个“ {"PrettyPrint":false,"Depth":0,"Index":-1,"Bracket":4}   ”的错
我把代码贴出来高手帮忙看看，十分感谢！
页面代码 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="myGridList.aspx.cs" Inherits="Frame_myGridList" %><!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>
     <link rel="stylesheet" type="text/css" href="resources/css/ext-all.css" />
  <script type="text/javascript" src="adapter/ext/ext-base.js"></script>
    <script type="text/javascript" src="js/ext-all.js"></script>
    <script type="text/javascript">
       Ext.onReady(function (){
         var sm=new Ext.grid.CheckboxSelectionModel();
        var cm = new Ext.grid.ColumnModel([
        new Ext.grid.RowNumberer(),
        sm,
        {header:'编号',dataIndex:'id'},
        {header:'性别',dataIndex:'sex',renderer:changeSex},
        {header:'名称',dataIndex:'name'},
        {header:'描述',dataIndex:'descn'}
    ]);    
      cm.defaultSortable = true;
      
      //根据性别改变当列颜色
      function changeSex(value){
         if(value=="male"){
           return "<span style='color:red;'>男</span>";
         }else if(value=="female"){
            return "<span style='color:green;'>女</span>";
         }
      }
      
     // var data ={"totalCount":"200","root":[{"id":"0","sex":"male","name":"小飞","descn":"详细说明"},{"id":"1","sex":"male","name":"小飞","descn":"详细说明"},{"id":"2","sex":"male","name":"小飞","descn":"详细说明"},{"id":"3","sex":"male","name":"小飞","descn":"详细说明"},{"id":"4","sex":"male","name":"小飞","descn":"详细说明"},{"id":"5","sex":"male","name":"小飞","descn":"详细说明"},{"id":"6","sex":"male","name":"小飞","descn":"详细说明"},{"id":"7","sex":"male","name":"小飞","descn":"详细说明"},{"id":"8","sex":"male","name":"小飞","descn":"详细说明"},{"id":"9","sex":"male","name":"小飞","descn":"详细说明"},{"id":"10","sex":"male","name":"小飞","descn":"详细说明"},{"id":"11","sex":"male","name":"小飞","descn":"详细说明"},{"id":"12","sex":"male","name":"小飞","descn":"详细说明"},{"id":"13","sex":"male","name":"小飞","descn":"详细说明"},{"id":"14","sex":"male","name":"小飞","descn":"详细说明"},{"id":"15","sex":"male","name":"小飞","descn":"详细说明"},{"id":"16","sex":"male","name":"小飞","descn":"详细说明"},{"id":"17","sex":"male","name":"小飞","descn":"详细说明"},{"id":"18","sex":"male","name":"小飞","descn":"详细说明"},{"id":"19","sex":"male","name":"小飞","descn":"详细说明"}]} ;
       
       var fds=new Ext.data.Store({
         proxy: new Ext.data.HttpProxy({url:'myGridList.aspx'}),
        // proxy: new Ext.data.MemoryProxy(data),
          reader:new Ext.data.JsonReader({
           totalProperty:'totalCount',
               root:"root"
          },
          [{name:'id'},{name:'sex'},{name:'name'},{name:'descn'}]
          )
          
       });
       
       var grid=new Ext.grid.EditorGridPanel({
         el:"table",
         store :fds,
         ds:fds,
         cm:cm,
         sm:sm,
         frame:true,
         width:600,
         height:400,
           loadMask: {msg:'正在加载数据，请稍侯……'},
         title:'测试例子',
         bbar: new Ext.PagingToolbar({
            pageSize:10,
            store:fds,
            displayInfo:true,
            displayMsg:'显示第 {0} 条到 {1} 条记录，一共 {2} 条',
            emptyMsg:'没有数据'
         })
        
       });
         //加载数据
          fds.load({
                params: { start: 1, limit:10 },
                callback: function(r, options, success) {
                    if (!success) {
                        alert("加载数据失败，无对应数据或者系统出现异常！");
                    }
                }
            });
        grid.render();
      
            
       //初始化函数结束符
       })
        
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div id="table" style="margin-left:15%;">
    
    </div>
    <div id="rightMenu_div"></div>
    <div id="north-div"></div>
    </form>
</body>
</html>后台代码：
  protected void Page_Load(object sender, EventArgs e)
    {
   
        string start = Request["start"];
        string limit = Request["limit"];        JsonTextWriter writer = new JsonTextWriter();
        writer.WriteStartObject();
        writer.WriteMember("totalCount");
        writer.WriteString("20");
        writer.WriteMember("root");
        writer.WriteStartArray();
        for (int i = 0; i < 20; i++)
        {
            writer.WriteStartObject();
            writer.WriteMember("id");
            writer.WriteString(i.ToString());
            writer.WriteMember("sex");
            writer.WriteString("male");
            writer.WriteMember("name");
            writer.WriteString("小飞");
            writer.WriteMember("descn");
            writer.WriteString("详细说明");
            writer.WriteEndObject();
        }
        writer.WriteEndArray();
        writer.WriteEndObject();
        JavaScriptSerializer js = new JavaScriptSerializer();
        Response.Write(js.Serialize(writer));
     
    }输出的json
{"totalCount":"20","root":[{"id":"0","sex":"male","name":"小飞","descn":"详细说明"},{"id":"1","sex":"male","name":"小飞","descn":"详细说明"},{"id":"2","sex":"male","name":"小飞","descn":"详细说明"},{"id":"3","sex":"male","name":"小飞","descn":"详细说明"},{"id":"4","sex":"male","name":"小飞","descn":"详细说明"},{"id":"5","sex":"male","name":"小飞","descn":"详细说明"},{"id":"6","sex":"male","name":"小飞","descn":"详细说明"},{"id":"7","sex":"male","name":"小飞","descn":"详细说明"},{"id":"8","sex":"male","name":"小飞","descn":"详细说明"},{"id":"9","sex":"male","name":"小飞","descn":"详细说明"},{"id":"10","sex":"male","name":"小飞","descn":"详细说明"},{"id":"11","sex":"male","name":"小飞","descn":"详细说明"},{"id":"12","sex":"male","name":"小飞","descn":"详细说明"},{"id":"13","sex":"male","name":"小飞","descn":"详细说明"},{"id":"14","sex":"male","name":"小飞","descn":"详细说明"},{"id":"15","sex":"male","name":"小飞","descn":"详细说明"},{"id":"16","sex":"male","name":"小飞","descn":"详细说明"},{"id":"17","sex":"male","name":"小飞","descn":"详细说明"},{"id":"18","sex":"male","name":"小飞","descn":"详细说明"},{"id":"19","sex":"male","name":"小飞","descn":"详细说明"}]}

解决方案 »

  1.   

    我把我输出的json 数据放在一个变量里 然后用 // proxy: new Ext.data.MemoryProxy(data),
    这种方式，就能显示数据，这样能确定我输出的 json 没错吗？
      

  2.   

    将你的json数据放到js下，用eval转换下看看是否能返回一个object。如果可以就是对的，反之错误
      

  3.   

    谁能发个。。.net+ext grid 从后台读取数据分页的。demo给我。。我真看不出自己错哪了
    我邮箱 [email protected]  
      

  4.   

    总算解决了，看来是发错地方了，要发到.ne模块去，原来不是js的问题，也不是json拼接有问题，是pageload的问题