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                         客户端:  复制代码 代码如下:  <%@ Page Language="C#" AutoEventWireup="true" CodeFile="ASP.NETA_JAX.aspx.cs" Inherits="_Default" %>  <!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></title>  <script type="text/jscript">  function CallServer() {  //JSON发送对象  ServerSum("{name:'linyijia',age:'21'}");  }  function GetRegister(rg,contex) {  document.getElementById("TxtRegister").value=rg;  }  </script>  </head>  <body>  <form id="form1" runat="server">  <div>  <br />  用户名:<input id="TxtNum1" type="text" />  <br />  服务器:<input id="TxtRegister" type="text" /><br />  <button id="SumBtn" type="button" onclick="CallServer()">登录</button>  </div>  </form>  </body>  </html>    服务器:  复制代码 代码如下:  using System;  using System.Collections.Generic;  using System.Linq;  using System.Web;  using System.Web.UI;  using System.Web.UI.WebControls;  using System.Web.Script.Serialization;  public partial class _Default : System.Web.UI.Page,ICallbackEventHandler  {  Users u = null;  protected void Page_Load(object sender,EventArgs e)  {  //回调GetRegister方法  string CallBackFun = Page.ClientScript.GetCallbackEventReference(this,"arg","GetRegister","context");  //创建ServerSum方法,在客户端调用的时候就,会回调GetRegister方法,把参数传给RaiseCallbackEvent(string eventArgument ),最后通过  //GetCallbackResult()方法把返回值传给客户端  string RegisterFun = string.Format("function ServerSum(arg,context){{{0};}}",CallBackFun);  Page.ClientScript.RegisterClientScriptBlock(this.GetType(),"ServerSum",RegisterFun,true);  }  string mssage = string.Empty;  #region ICallbackEventHandler 成员  public string GetCallbackResult()  {  return "服务器:你好,你的用户名为:" + u.Name + "你的年龄为" + u.Age;  }  public void RaiseCallbackEvent(string eventArgument)  {  JavaScriptSerializer js = new JavaScriptSerializer();  u =js.Deserialize<Users>(eventArgument);  }  #endregion  }    Users类  复制代码 代码如下:  using System;  using System.Collections.Generic;  using System.Linq;  using System.Web;  /// <summary>  ///User 的摘要说明  /// </summary>  public class Users  {  string name;  public string Name  {  get { return name; }  set { name = value; }  }  string age;  public string Age  {  get { return age; }  set { age = value; }  }  }    原理:  使用JSON向服务器发送一个对象,服务器通过实现 ICallbackEventHandler接口后,重写GetCallbackResult和RaiseCallbackEvent方法,在回调的时候,在RaiseCallbackEvent方法  中反序列化JSON,并在GetCallbackResult把结果返回给客户端.具体的我以后有空再补充,欢迎大家讨论!                         (编辑:莱芜站长网) 
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