前面讲过AJAX如何传入JSON数据（http://www.jb51.cc/article/p-kaqozsfh-mx.html），接着就是后台如何接收并处理了。下面通过一个实例的展示就一目了然了。

前端代码：

<script src="jquery-1.8.0.min.js" type="text/javascript"></script>
    <script type="text/javascript">

        var user = {
            name:"BiXin",age:25,weight:135
        };

        $(function () {
            $.ajax({
            
                url:"server.aspx",type: "post",data: JSON.stringify(user),headers: { Accept: "application/json","Content-Type": "application/json" },processData: false,success:function(data,textStatus,jqXHR){
                    
                }
            });

        });

    
    </script>

后台代码（这里引用了Newtonsoft来做JSON数据的反序列化，具体可以百度下Newtonsoft的使用方法，dll文件下载地址http://james.newtonking.com/json）：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections.Specialized;
using System.IO;
using Newtonsoft.Json;

namespace OAJAX
{
    public partial class server : System.Web.UI.Page
    {
        protected void Page_Load(object sender,EventArgs e)
        {
            StreamReader sr = new StreamReader(Request.InputStream);
            string userStr = sr.ReadToEnd();
            User user = JsonConvert.DeserializeObject<User>(userStr); ;
            
            // 接着对User对象做处理。。。

            Response.End();
        }

    }

    public class User {

        private string name;

        public string Name
        {
            get { return name; }
            set { name = value; }
        }
        private int age;

        public int Age
        {
            get { return age; }
            set { age = value; }
        }
        private int weight;

        public int Weight
        {
            get { return weight; }
            set { weight = value; }
        }
    }
}

部分运行结果截图：