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";

ASCIIEncoding encoding = new ASCIIEncoding();
                    byte[] data = encoding.GetBytes(postData);
                    HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url);

myRequest.Method = "POST";
                    myRequest.ContentType = "application/x-www-form-urlencoded";
                    myRequest.ContentLength = data.Length;
                    Stream newStream = myRequest.GetRequestStream();

newStream.Write(data, 0, data.Length);
                    newStream.Close();

HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
                    StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.Default);
                    string content = reader.ReadToEnd();
                    reader.Close();