跨域Ajax请求（jQuery JSONP MVC）

通过jQuery的$.ajax方法发送JSONP请求

js代码

     <script type="text/javascript">
         function jsonptest2(result) {//jsonptest2必须是全局唯一的方法
             alert(result.Age + " " + result.Email);//28 [e-mail]
         }

         $.ajax({
             type: "GET",
             url: "http://localhost:2528/Default2/JsonAuction/1",//跨域
             dataType: "jsonp",
             jsonpCallback: "jsonptest2"
         });
     </script>

MVC中C#代码，即请求http://localhost:2528/Default2/JsonAuction/1

    public class Default2Controller : Controller
    {
        public ActionResult JsonAuction(int id)
        {
            Person p = new Person() {Age=,Email="[e-mail]" };//模拟数据Person类见下面
            return  = new JsonpResult() { Data=p};
        }
    }
　　//自定义返回类型
    public class JsonpResult : JsonResult
    {
        public string Callback { get; set; }
        public JsonpResult()
        {
            JsonRequestBehavior = JsonRequestBehavior.AllowGet;
        }

        public override void ExecuteResult(ControllerContext context)
        {
            var httpContext = context.HttpContext;
            var callback = Callback;
            if (string.IsNullOrWhiteSpace(callback))
            {
                callback = httpContext.Request["callback"];
            }
            httpContext.Response.Write(callback);
            httpContext.Response.Write("(");
            base.ExecuteResult(context);
            httpContext.Response.Write(");");

        }
    }

    public class Person
    {
        public int Age
        {
            get;
            set;
        }
        public string Email
        {
            get;
            set;
        }

    }