public static Result<GetExpressCollectionResponseType> GetDataFromWebs(string waybillNumbers)

        {

            var result = new Result<GetExpressCollectionResponseType>();

            try

            {

                var url = "http://***.com.cn/service/Manage/999001/Expresses/GetExpressByEpcodes";

                var client = new WebClient();

                client.Headers.Add(HttpRequestHeader.Authorization, "basic OTk5MDAxOjEyMzQ1Njc4");

                client.Headers.Add(HttpRequestHeader.ContentType, "text/xml; charset=utf-8");

                var postbody = "<string>" + waybillNumbers + "</string>";

                var data = Encoding.UTF8.GetBytes(postbody);

                var response = client.UploadData(url, "POST", data);

                GetExpressCollectionResponseType t = default(GetExpressCollectionResponseType);

                var xmlSerializer = new XmlSerializer(typeof(GetExpressCollectionResponseType));

                using (Stream xmlStream = new MemoryStream(response))

                {

                    using (XmlReader xmlReader = XmlReader.Create(xmlStream))

                    {

                        Object obj = xmlSerializer.Deserialize(xmlReader);

                        t = (GetExpressCollectionResponseType)obj;

                    }

                }

                result.Entity = t;

            }

            catch (Exception ex)

            {

                result.HasError = true;

                result.ErrorMessage = ex.Message;

            }

            return result;

        }

 public static Result<string> GetLabelFromWeb(string waybillNumber, string filename, string labelSize)

        {

            var result = new Result<string>();

            try

            {

                var url = string.Format("http://***.com.cn/service/Manage/999001/Expresses/{0}/{1}Label",

                    waybillNumber, labelSize);

                var client = new WebClient();

                client.Headers.Add(HttpRequestHeader.Authorization, "basic OTk5MDAxOjEyMzQ1Njc4");

                client.Headers.Add(HttpRequestHeader.ContentType, "text/xml; charset=utf-8");

                client.DownloadFile(url, filename);

                result.Entity = filename;

            }

            catch (Exception ex)

            {

                result.HasError = true;

                result.ErrorMessage = ex.Message;

            }

            return result;

        }