1、比如有一服務

        [HttpPost]
        public ActionResult Index(string str)
        {
            try
            {
                System.IO.File.WriteAllText(Server.MapPath(@"/test/txt.txt"), str, Encoding.UTF8);
                return Content("已上傳完成 ");
            }
            catch (Exception ex)
            {
                
 
return Content(ex.Message);
                throw;
            }
        }

2、使用webclient發出請求

        static void Main(string[] args)
        {
            WebClient wc = new WebClient();
            wc.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
            var b = Encoding.UTF8.GetBytes("
 
str=我是從webclient來的朋友");
            var res = wc.UploadData(@"http://localhost:1863/", "post", b);
            var result = Encoding.UTF8.GetString(res);
            Console.WriteLine(result);
            Console.Read();
        }

C# 用 WebClient 的 Post 方法向 WebServer 傳輸數據