#region 文件上传。

        /// <summary>

        /// 文件上传。

        /// </summary>

        public async Task<string> UpLoadFilesAsync(string fileName, string token)

        {

            string fileType = Path.GetExtension(fileName);

            string fileExpand = fileType.Substring(1, fileType.Length - 1);

            string upLoadParms = "?Service=notifyfile" + "&token=" + token + "&filetype=" + fileExpand;

            WebRequest webRequest = HttpWebRequest.Create(AppConfig.HttpISSServiceUrl + upLoadParms);

            System.Text.Encoding coding = System.Text.Encoding.UTF8;

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

            webRequest.Method = "POST";

            System.IO.Stream requestStream = webRequest.GetRequestStream();

            FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);

            BinaryReader binaryReader = new BinaryReader(fileStream, System.Text.Encoding.UTF8);

            byte[] buffer = binaryReader.ReadBytes((int)fileStream.Length);

            requestStream.Write(buffer, 0, buffer.Length);

            fileStream.Close();

            requestStream.Close();

            WebResponse response = webRequest.GetResponse();

            Stream responseStream = response.GetResponseStream();

            StreamReader streamReador = new System.IO.StreamReader(responseStream);

            string returnVal = streamReador.ReadToEnd();

            responseStream.Close();

            response.Close();

            return AnalyzeXML(returnVal);

        }

        /// <summary>

        /// 结果为通知格式,返回true为发送成功

        /// </summary>

        private string AnalyzeXML(string xml)

        {

            if (string.IsNullOrEmpty(xml)) return "";

            try

            {

                var xmlDoc = new XmlDocument();

                xmlDoc.LoadXml(xml);

                XmlNode rootNode = xmlDoc.DocumentElement;

                string fileGuid = rootNode.SelectSingleNode("filename").InnerText.Trim();

                return fileGuid;

            }

            catch (Exception ex)

            {

                throw ex;

            }

        }

        #endregion