访问URI地址

 //发送消息到服务器

        public string HttpConnectToServer(string ServerPage)

        {

            byte[] dataArray = Encoding.Default.GetBytes("data=test");

            //创建请求

            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(ServerPage);

            request.Method = "POST";

            request.ContentLength = dataArray.Length;

            request.ContentType = "application/x-www-form-urlencoded";

            //创建输入流

            Stream dataStream = null;

            try

            {

                dataStream = request.GetRequestStream();

            }

            catch (Exception)

            {

                return null;//连接服务器失败

            }

            //发送请求

            dataStream.Write(dataArray, , dataArray.Length);

            dataStream.Close();

            //读取返回消息

            string res = string.Empty;

            try

            {

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

                StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);

                res = reader.ReadToEnd();

                reader.Close();

            }

            catch (Exception)

            {

                return null;//连接服务器失败

            }

            return res;

        }