后台post

抄来的例子

                string url = "http://wx.sysmex.com.cn:8080/Utility/AddressBookSync.aspx";
                string postData = "method=sync";
                postData += "&data2=xxx";
                byte[] data = Encoding.UTF8.GetBytes(postData);
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = data.Length;
                Stream stream = request.GetRequestStream();
                stream.Write(data, 0, data.Length);
                stream.Close();
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);
                string content = reader.ReadToEnd();
                reader.Close();