C# 后台请求Web API

1.新建控制台应用程序

代码：

  class Program
    {
        static void Main(string[] args)
        {
            string ssPost = HttpPost("http://localhost:9041/api/MyApi/PostMethodStr", "{\"Name\":\"zhangsan\"}");
            string ssGet = HttpGet("http://localhost:9041/api/MyApi/GetMethodStr?name=zhangsan");
            Console.WriteLine(ssPost);
            Console.WriteLine(ssGet);
            Console.ReadLine();
        }

        public static string HttpPost(string url, string body)
        {
            Encoding encoding = Encoding.UTF8;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "POST";
            request.Accept = "text/html, application/xhtml+xml, */*";
            request.ContentType = "application/json";

            byte[] buffer = encoding.GetBytes(body);
            request.ContentLength = buffer.Length;
            request.GetRequestStream().Write(buffer, 0, buffer.Length);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
            {
                return reader.ReadToEnd();
            }
        }

        public static string HttpGet(string url)
        {
            Encoding encoding = Encoding.UTF8;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "GET";
            request.Accept = "text/html, application/xhtml+xml, */*";
            request.ContentType = "application/json";

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
            {
                return reader.ReadToEnd();
            }
        }
    }

2.创建Web API ASP.NET项目

.

代码：

    public class MyApiController : ApiController
    {
        // GET api/myapi
        public IEnumerable Get()
        {
            return new string[] { "value1", "value2" };
        }

        // GET api/myapi/5
        public string Get(int id)
        {
            return "value";
        }

        public string GetMyValue(int id)
        {
            return id + " TEST";
        }
      
        [HttpPost]
        //测试Web API POST效果
        public string PostMethodStr([FromBody] dynamic obj)
        {
            var str = "Success" + " " + obj.Name;
            return str;
        }

        [HttpGet]
        //测试Web API GET效果
        public string GetMethodStr([FromUri] string name)
        {
            var str = "Success" + " " + name;
            return str;
        }

        // POST api/myapi
        public void Post([FromBody]string value)
        {
        }

        // PUT api/myapi/5
        public void Put(int id, [FromBody]string value)
        {
        }

        // DELETE api/myapi/5
        public void Delete(int id)
        {
        }
    }