MVC4 web API 如何获取Post过来的json数据？

 protected void Button1_Click(object sender, EventArgs e)

    {

        string json = GetReleseUserJson();

        string str = HttpPost(json, "http://192.168.1.113/testapi/api/test");

        Response.Write(str);

    }



    private string HttpPost(string postDataStr, string Url)

    {

        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);

        request.Method = "POST";

        request.ContentType = "application/json";

        //request.ContentLength = Encoding.UTF8.GetByteCount(postDataStr);

        Stream myRequestStream = request.GetRequestStream();

        StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));

        myStreamWriter.Write(postDataStr);

        myStreamWriter.Close();

        HttpWebResponse response = (HttpWebResponse)request.GetResponse();

        Stream myResponseStream = response.GetResponseStream();

        StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));

        string retString = myStreamReader.ReadToEnd();

        myStreamReader.Close();

        myResponseStream.Close();

        return retString;

    }

    //JSON字符串

    public static string GetReleseUserJson()

    {



     



        string json = "{";

        json += "\"ID\":5,";

        json += "\"Name\":\"超大厦\",";

        json += "\"Age\":55";

        json += "}";

        return json;

    }

 public Test Post([FromBody]Test ttt)

        {

            





            return ttt;

        }

public class Test

    {

        public int ID { get; set; }



        public string Name { get; set; }



        public int Age { get; set; }



       

    }