C# 调用WEBAPI

引用DLL  System.Net.Http    System.Net.Http.Formatting

引用命名空间  using System.Net;   using System.IO;

HttpWebRequest wReq = (HttpWebRequest)WebRequest.Create("http://localhost:8087/api/Test/TestAPI");
wReq.Method = "Post";
wReq.ContentType = "application/json";

byte[] data = Encoding.Default.GetBytes("{"ModifyDate": "sample string 1","TimeStamp": 2,"Sign": "sample string 3"}");
wReq.ContentLength = data.Length;
Stream reqStream = wReq.GetRequestStream();
reqStream.Write(data, 0, data.Length);
reqStream.Close();
using (StreamReader sr = new StreamReader(wReq.GetResponse().GetResponseStream()))
{
string result = sr.ReadToEnd();
//result即返回值
}