有几个特殊之处

1. MVC框架中包含了一个特殊的JSONActionResult，可以直接返回JSON对象，注意它的格式与之前的asmx和页面静态方法都不一样，它直接就是一个JSON对象

2. 服务端和客户端编程都相对简单了。服务器端无须明确序列化，而客户端也无须解析JSON字符串了，因为返回的结果本来就是一个JSON对象

第一部分：Controller中的设计

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;namespace MvcApplication1.Controllers
{public class Employee{public int Id { get; set; }public string Name { get; set; }}[HandleError]public class HomeController : Controller{public ActionResult Index(){ViewData["Message"] = "Welcome to ASP.NET MVC!";return View();}public ActionResult About(){return View();}public ActionResult Employee() {return View();}[HttpPost]public ActionResult GetEmployee() {return Json(new Employee(){Id = 1,Name = "chenxizhang"});}}
}

第二部分:View中的设计

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" %><asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">GetEmployee
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"><script src="../../Scripts/jquery-1.3.2-vsdoc.js" type="text/javascript"></script><script type="text/javascript" language="javascript">$(function() {$("#bt").click(function() {$.ajax({type: "POST",contentType: "application/json",url: "http://localhost:44203/Home/GetEmployee",data: "{}",dataType: 'json',success: function(result) {alert(result.Id);}});});});</script><h2>GetEmployee</h2><input type="button" value="Invoke" id="bt" /><div id="info"></div>
</asp:Content>