上一节讲到如何使用jsonp进行跨域请求api，这次我们用一些微软新的框架解决这个问题

web api是微软继web service,wcf推出的新一代的服务提供框架

不多说了，用用看

首先一个基类，所有的controller继承此基类，里面有个无返回值的方法Options

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace MvcApplication1.Controllers
{
    public class ApiController : Controller
    {
        public string Options()
        {
            return null; // HTTP 200 response with empty body

        }
    }
}

我们的具体调用的action:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MvcApplication1.Filter;

namespace MvcApplication1.Controllers
{

    public class HomeController : ApiController
    {
        public ActionResult Index()
        {
            return View();
        }

       
        public JsonResult Get()
        {
            IList<DataModel> ls=new List<DataModel>(){
                new DataModel{
                    name="kong",age=25
                },new DataModel{
                    name="wang",age=26
                }
            };
            return Json(ls,JsonRequestBehavior.AllowGet);
        }
    }

    public class DataModel
    {
        public string name { get; set; }
        public int age { get; set; }
    }
}

<pre name="code" class="html"> <httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*" />
        <add name="Access-Control-Allow-Headers" value="*" />
        <add name="Access-Control-Allow-Methods" value="GET,POST,PUT,DELETE" />
      </customHeaders>
    </httpProtocol>

<pre name="code" class="javascript"><script type="text/javascript">
        $(function () {
            $.ajax({
                type: "get",async: false,url: "http://localhost:8/home/get",dataType: "json",success: function (json) {
                    var html = '<li class="swiper-slide tabNavActive">推荐</li>';
                    $.each(json,function () {
                        html += '<li class="swiper-slide">' + this.name + '</li>';
                    });
                    $("#floor").html(html);
                },error: function () {
                    alert('fail');
                }
            });
        });
    </script>