js flexigrid 如何从aspx.cs文件中获得数据源

悬赏园豆：20 [待解决问题]

 1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2"%>
 2 
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 4 
 5 <html xmlns="http://www.w3.org/1999/xhtml">
 6 <head runat="server">
 7     <title>无标题页</title>
 8     <script type="text/javascript" src="JS/jquery-1.4.1-vsdoc.js"></script>
 9     <script type="text/javascript" src="flexigrid-1.1/js/flexigrid.js"></script>
10     <link href="flexigrid-1.1/css/flexigrid.css" type="text/css" rel="stylesheet"/>
11     <link href="flexigrid-1.1/css/flexigrid.pack.css" type="text/css"/>
12     <script type="text/javascript">
13 <%-- 
14        $(document).ready(function() {
15             $("#grdProList").flexigrid(
16             {
17                 url: "Default3.aspx?id=test",//这样写好像无法获得数据，请高人指点
18                 dataType: 'json',
19                 colModel: [
20 // { display: '<input type="checkbox" id="checkAll"/>', name: 'check', width: 50, sortable: false, align: 'center', hide: false }, 
21 //{display: '选择', name: '', sortable: true, width: 20, align: 'center' },
22                          { display: '项目编码', name: 'pro_no', sortable: true, width: 80, align: 'center' },
23                          { display: '项目名称', name: 'pro_name', sortable: true, width: 80, align: 'center' },
24                          { display: '业务类别', name: 'pro_type', sortable: true, width: 80, align: 'left' },
25                          { display: '业务类别2', name: 'pro_type2', sortable: true, width: 80, align: 'left' },
26                          { display: '投资规模', name: 'pro_invest', sortable: true, width: 80, align: 'left' }
27                          ],
28                 buttons: [
29                          { name: '显示&nbsp;/&nbsp;隐藏查询',
30                              bclass: 'showMagnifier'//,
31 //onpress: queryBt
32                          },
33                          {
34                              name: '导出excel',
35                              bclass: 'showMagnifier'//,
36 //onpress: toExcel
37                          }
38                          ],
39                 searchitems: [
40                              { display: '项目编码', name: 'pro_no' },
41                              { display: '项目名称', name: 'pro_name' },
42                              { display: '业务类别', name: 'pro_type' }
43                              ],
44 
45                 ShowToggleCol: true,
46                 singleSelect: true,
47                 sortname: 'pro_no',
48                 sortorder: 'asc',
49                 usepager: true,
50                 striped: true,
51                 title: '项目列表',
52                 useRp: true,
53                 rp: 20,
54                 width: 860,
55 // hideOnSubmit: true,
56 // onSubmit: addFormData,
57                 height: 400,
58 //pagestat: '显示 {from} 到 {to}， 共 {total} 条',
59                 procmsg: '请等待数据正在加载中 …',
60                 nomsg: '没有数据',
61                 onError: '查询出错，请刷新'
62             });
63 
64 function queryBt() {
65 // $("#sform").slideToggle(200);
66             }
67 function toExcel() {
68                 preview();
69 
70             }
71 
72         });--%>
73 </script>
74 </head>
75 <body>
76     <form id="form1" runat="server">
77         <table id="grdProList" style="display: none;">
78 
79         </table>
80     </form>
81 </body>
82 </html>

后台数据源(Default3.aspx.cs)

public partial class Default3 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string index = Request.QueryString["id"];
        if (index == "test")
        {
            getjson();
        }
    }

    public void getjson()
    {
        Response.ContentType = "application/json";
        StringBuilder json = new StringBuilder();
        json.Append("{");
        json.Append("page: 1,");
        json.Append("total: 1,");

        json.Append("rows: [");
        //json.Append(",");
        //first row
        json.Append("{");
        json.Append("id:'row1',");
        json.Append("cell:['iso'");
        json.Append(",'name'");
        json.Append(",'printable_name'");
        json.Append(",'iso3'");
        json.Append(",'numcode']");
        json.Append("},");
        //second row
        json.Append("{");
        json.Append("id:'row2',");
        json.Append("cell:['iso-2'");
        json.Append(",'name-2'");
        json.Append(",'printable_name-2'");
        json.Append(",'iso3-2'");
        json.Append(",'numcode-2']");
        json.Append("}");

        json.Append("]");
        json.Append("}");

        Response.Write(json);

    }
}