不废话了，直奔主题吧
wcf端：
近几年比较流行restful，为了能让ajax调用，同时也为了支持restful风格的uri，在创建一个Ajax-enabled Wcf Service后，必须手动修改svc文件，指定Factory，即：
<%@ ServiceHost Language="C#" Debug="true" Service="ajaxSample.HelloWorld" CodeBehind="HelloWorld.svc.cs" Factory="System.ServiceModel.Activation.WebServiceHostFactory" %>
注：如果不添加Factory，则wcf将无法用类似http://localhost/helloWorld.svc/Hello/person/name 的restful方式直接访问。
同时还要去掉web.config中的<enableWebScript />即类似:
<system.serviceModel>
<behaviors>
<endpointBehaviors>
<behavior name="ajaxSample.HelloWorldAspNetAjaxBehavior">
<!--<enableWebScript />-->
</behavior>
</endpointBehaviors>
</behaviors>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true"
multipleSiteBindingsEnabled="true" />
<services>
<service name="ajaxSample.HelloWorld">
<endpoint address="" behaviorConfiguration="ajaxSample.HelloWorldAspNetAjaxBehavior"
binding="webHttpBinding" contract="ajaxSample.HelloWorld" />
</service>
</services>
</system.serviceModel>
好了，开始写代码，鉴于wcf调用时有GET/POST二种方式，下面把几种常用的情况都写一个示例方法：
using System.Collections.Generic;
using System.ServiceModel;
using System.ServiceModel.Activation;
using System.ServiceModel.Web;namespace ajaxSample
{[ServiceContract(Namespace = "http://yjmyzz.cnblogs.com/")][AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]public class HelloWorld{/// <summary>/// 只能Post的Restful方法/// </summary>/// <param name="person"></param>/// <param name="welcome"></param>/// <returns></returns>[OperationContract][WebInvoke(Method = "POST", UriTemplate = "PostRestfulTest/{person}/{welcome}", ResponseFormat = WebMessageFormat.Json)]public List<string> PostRestfulTest(string person,string welcome){List<string> result = new List<string>();result.Add("PostRestfulTest -> from server:");result.Add(person);result.Add(welcome);return result;}/// <summary>/// 只能Get的Restful方法/// </summary>/// <param name="person"></param>/// <param name="welcome"></param>/// <returns></returns>[OperationContract][WebInvoke(Method = "GET", UriTemplate = "GETRestfulTest/{person}/{welcome}", ResponseFormat = WebMessageFormat.Json)]public List<string> GETRestfulTest(string person, string welcome){List<string> result = new List<string>();result.Add("GETRestfulTest -> from server:");result.Add(person);result.Add(welcome);return result;}/// <summary>/// 即可Get与Post的Restful方法/// </summary>/// <param name="person"></param>/// <param name="welcome"></param>/// <returns></returns>[OperationContract][WebInvoke(Method = "*", UriTemplate = "RestfulTest/{person}/{welcome}", ResponseFormat = WebMessageFormat.Json)]public List<string> RestfulTest(string person, string welcome){List<string> result = new List<string>();result.Add("RestfulTest -> from server:");result.Add(person);result.Add(welcome);return result;}/// <summary>/// 只能Post的常规方法(注：Post方式，BodyStyle必须设置成WrappedRequest或Wrapped)/// </summary>/// <param name="person"></param>/// <param name="welcome"></param>/// <returns></returns>[OperationContract][WebInvoke(Method = "POST", ResponseFormat = WebMessageFormat.Json, BodyStyle=WebMessageBodyStyle.WrappedRequest)]public List<string> PostTest(string person, string welcome){List<string> result = new List<string>();result.Add("PostRestfulTest -> from server:");result.Add(person);result.Add(welcome);return result;}/// <summary>/// 只能Get的常规方法/// </summary>/// <param name="person"></param>/// <param name="welcome"></param>/// <returns></returns>[OperationContract][WebInvoke(Method = "GET", ResponseFormat = WebMessageFormat.Json)]public List<string> GETTest(string person, string welcome){List<string> result = new List<string>();result.Add("GETTest -> from server:");result.Add(person);result.Add(welcome);return result;}}
}
jQuery调用代码：
<script type="text/javascript">$().ready(function () {$.post("HelloWorld.svc/PostRestfulTest/111/222", function (data) {alert("PostRestfulTest调用成功，返回值为：" + data);})$.get("HelloWorld.svc/GETRestfulTest/333/444", function (data) {alert("GETRestfulTest调用成功，返回值为：" + data);})$.get("HelloWorld.svc/RestfulTest/555/666", function (data) {alert("RestfulTest GET方式调用成功，返回值为：" + data);})$.post("HelloWorld.svc/RestfulTest/777/888", function (data) {alert("RestfulTest POST方式调用成功，返回值为：" + data);})$.get("HelloWorld.svc/GETTest", { person: "aaa", welcome: "bbb" }, function (data) {alert("GETTest 调用成功，返回值为：" + data);});$.ajax({url: "HelloWorld.svc/PostTest",type: "POST",contentType: "application/json",data: '{"person":"ccc","welcome":"ddd"}',dataType: "html",success: function (data) { alert("PostTest调用成功，返回值为：" + data); }});})</script>
有时候，WCF暴露的方法中可能需要一些敏感信息做为参数(比如用户名/用户ID之类)，这时如果直接用js来调用wcf，可能会把这部分信息泄漏在客户端，这种场景下，我们也经常用一个服务端的ashx来做中转
TestService.svc
using System.ServiceModel;namespace ashx_jQuery
{[ServiceContract]public class TestService {/// <summary>/// 获取当前用户指定月份的工资/// </summary>/// <param name="userId"></param>/// <param name="month"></param>/// <returns></returns>[OperationContract]public double GetSalary(int userId,int month){if (month == 1)//只是演示而已{return 5000;}else {return 1000;}}}
}
AjaxProcess.ashx
using System.Web;namespace ashx_jQuery
{/// <summary>/// Summary description for AjaxProcess/// </summary>public class AjaxProcess : IHttpHandler{public void ProcessRequest(HttpContext context){context.Response.ContentType = "text/plain";string month = context.Request["month"];TestService wcf = new TestService();double salary = wcf.GetSalary(GetUserId(), int.Parse(month));context.Response.Write("{salary:" + salary + "}");}/// <summary>/// 获取当前的用户ID/// </summary>/// <returns></returns>private int GetUserId() {return 1;}public bool IsReusable{get{return false;}}}
}
jQuery调用:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="default.aspx.cs" Inherits="ashx_jQuery._default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server"><title>jQuery ashx Sample</title><script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.1.min.js"></script><script type="text/javascript">$().ready(function () {$("#btnTest").click(function () {$.post("AjaxProcess.ashx",{ month:1 },function (e) {var d = eval("(" + e + ")");alert(d.salary);}, "html");})})</script>
</head>
<body><form id="form1" runat="server"><input type="button" value="GetSalary" id="btnTest"/></form>
</body>
</html>
示例代码：
http://files.cnblogs.com/yjmyzz/jquery_ajax_wcf_rest.zip