WebApi服务以及跨域设置

WCF 它利用TCP、HTTP、MSMQ等传输协议构建“契约先行”的服务。WCF最初为基于SOAP的服务而设计[xml],繁琐、冗余、慢、沉重

WebApi 基于http协议，轻量级的，支持URL路由，透过用户熟悉的MVC风格路由语义，生成干净的URL

新建webapi项目就不说了，webapi充当服务，其实也就是一个类似于mvc的项目


    public class DongController : ApiController
    {
        //Us_User自己新建的一个实体类
        public List<Us_User> GetUserId(int k)
        {
            var list = new List<Us_User>();
            for (int i = 0; i < k; i++)
            {
                var model = new Us_User
                {
                    Id = i,
                    Age = i * 5,
                    Name = "你好" + i,
                    Sex = "男" + i
                };
                list.Add(model);

            }
            return list;
        }

        [HttpPost]
        //[FromBody]它指拿HttpRequestMessage里参数
        public IList<Us_User> PostUserName([FromBody]ParamModel obj)
        {
            var list = new List<Us_User>();
            for (int i = 0; i < obj.Index; i++)
            {
                var model = new Us_User
                {
                    Id = i,
                    Age = i * 5,
                    Name = obj.Phone + i,
                    Sex = obj.UName + i
                };
                list.Add(model);

            }
            return list;
        }
    }

另一个项目开始调用

     //Get方式
     public ActionResult Index()
        {
            HttpClient client = new HttpClient();
            var responseJson = client.GetAsync("http://localhost:40821/api/Dong/GetUserId?k=9").Result.Content.ReadAsStringAsync().Result;
            var list = JsonConvert.DeserializeObject<List<Us_User>>(responseJson);
            return View();
        }

        //Post方式
        public void GetName(string userName)
        {
            var json = JsonConvert.SerializeObject(new
            {
                Index = 10,
                Num = 20,
                Phone = "15210225315",
                UName = "hehe"
            });
            HttpContent httpContent = new StringContent(json);
            httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
            HttpClient client = new HttpClient();
            var responseJson = client.PostAsync("http://localhost:40821/api/Dong/PostUserName", httpContent).Result.Content.ReadAsStringAsync().Result;
            var list = JsonConvert.DeserializeObject<List<Us_User>>(responseJson);
        }

使用put方式时出现不支持

设置WebApi跨域 ，WebApi的web.config中加入下面跨域跨域设置即可

<system.webServer>

    <httpProtocol>

      <customHeaders>

        <add name="Access-Control-Allow-Origin" value="*" />

        <add name="Access-Control-Allow-Headers" value="Content-Type" />

        <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS" />

      </customHeaders>

    </httpProtocol>