Asp.Net MVC2.0 Jquery Json  
 3 

 4 <script type="text/javascript">
 5     function postBBSData() {
 6                 var da = $("#bbscontent").val();
 7                 $.ajax({
 8                     type: "GET",
 9                     url: "/home/GetBBSJsonData",//MVC2.0中 Controller：Home，Action：GetBBSJsonData
10                     data: "txt=" + da + "&pid=bb&userid=gxw",//运用的GET类型，也可以用POST，只需要底层代码修改下
11                     dataType: "json",                       //返回值为JSON了性
12                     success: function (msg) {
13                         var p = "<span>" + msg.UserID + "</span><span>" + msg.Context + "</span>"
14                         $("#BBSTr").appendTo(p);
15                     }
16                 });
17             }    
18 </script>
19 
20  <div id="BBSTr">
21                     <span>11111</span>
22                 </div>
23                 <table>
24                     <tr>
25                         <td>
26                             用户名：<%=Html.TextBox("bbsuserid") %>
27                         </td>
28                     </tr>
29                     <tr>
30                         <td>
31                             内容：<%=Html.TextArea("bbscontent")%>
32                         </td>
33                     </tr>
34                     <tr>
35                         <td>
36                             <input type="submit" onclick="postBBSData();" value="提交" />
37                         </td>
38                     </tr>
39                 </table>
40 
41 
42 Controller:
43 
44    public JsonResult GetBBSJsonData()
45         {
46             string context = Request.QueryString["txt"].ToString();
47             string productID = Request.QueryString["pid"].ToString();
48             string userId = Request.QueryString["userid"].ToString();
49             var p = new//这也是一种类型的JSON
50             {
51                 Context = context,
52                 UserID = userId,
53                 CurrentTime = DateTime.Now.ToString()
54             };
55             return Json(p, JsonRequestBehavior.AllowGet);//JsonRequestBehavior.AllowGet为了Get传值不出错
56         }