/// 
 　　/// 页面加载时    /// 
    ///     ///     protected void Page_Load(object sender, EventArgs e)    {        //判断是否异步请求        if (Request.QueryString["ajax"] == "1")        {            ProcessRequest();        }    }    /// 
    /// 处理异步请求    /// 
    private void ProcessRequest()    {        Response.ContentType = "text/html";        string json = Request.Form["json"];        //反序列化DataTable        DataTable newdtb = Json2Dtb(json);        //序列化DataTable为JSON        string back = Dtb2Json(newdtb);        Response.Write(back);        Response.End();    }    /// 
    /// DataTable转Json    /// 
    ///     /// 
         private string Dtb2Json(DataTable dtb)    {        JavaScriptSerializer jss = new JavaScriptSerializer();        ArrayList dic = new ArrayList();        foreach (DataRow row in dtb.Rows)        {            Dictionary
     
       drow = new Dictionary
      
       ();            foreach (DataColumn col in dtb.Columns)            {                drow.Add(col.ColumnName, row[col.ColumnName]);            }            dic.Add(drow);        }        return jss.Serialize(dic);    }    /// 
       
    /// Json转DataTable    /// 
    /// 
           /// 
           private DataTable Json2Dtb(string json)    {        JavaScriptSerializer jss = new JavaScriptSerializer();        ArrayList dic = jss.Deserialize
       
        (json);        DataTable dtb = new DataTable();        if (dic.Count > 0)        {            foreach (Dictionary
        
          drow in dic)            {                if (dtb.Columns.Count == 0)                {                    foreach (string key in drow.Keys)                    {                        dtb.Columns.Add(key, drow[key].GetType());                    }                }                DataRow row = dtb.NewRow();                foreach (string key in drow.Keys)                {                    row[key] = drow[key];                }                dtb.Rows.Add(row);            }        }        return dtb;    }
        
       
      
     

 前端页面

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>                    qqq