----------------實體類  [DataContract]  public class SyncResponseEntity  {    public SyncResponseEntity() { }    /// <summary>    /// 需要查詢的快遞代號    /// </summary>    [DataMember(Order = 0, Name = "id")]    public string ID { get; set; }     /// <summary>    /// 需要查詢的快遞名稱    /// </summary>    [DataMember(Order = 1, Name = "name")]    public string Name { get; set; }     /// <summary>    /// 需要查詢的快遞單號    /// </summary>    [DataMember(Order = 2, Name = "order")]    public string Order { get; set; }     /// <summary>    /// 消息內容    /// </summary>    [DataMember(Order = 5, Name = "message")]    public string Message { get; set; }     /// <summary>    /// 服務器狀態    /// </summary>    [DataMember(Order = 6, Name = "errcode")]    public string ErrCode { get; set; }     /// <summary>    /// 運單狀態    /// </summary>    [DataMember(Order = 7, Name = "status")]    public int Status { get; set; }     /// <summary>    /// 跟蹤記錄    /// </summary>    [DataMember(Order = 8, Name = "data")]    public List<Order> Data { get; set; }  }   [DataContract(Name = "data")]  public class Order  {    public Order() { }    public Order(string time, string content)    {      this.Time = time;      this.Content = content;    }     [DataMember(Order = 0, Name = "time")]    public string Time { get; set; }     [DataMember(Order = 1, Name = "content")]    public string Content { get; set; }   } ---------調用方法public static int uid = Utils.GetAppConfig<int>("KUAIDIAPI_UID", 0);    public static string sync_url = Utils.GetAppConfig<string>("KUAIDIAPI_SYNC_URL", string.Empty);    public static string key = Utils.GetAppConfig<string>("KUAIDIAPI_KEY", string.Empty);     /// <summary>    /// 同步單號查詢方法    /// </summary>    /// <typeparam name="T"></typeparam>    /// <param name="id"></param>    /// <param name="order"></param>    /// <param name="isSign"></param>    /// <param name="isLast"></param>    /// <param name="defaultValue"></param>    /// <returns></returns>    public static T APIQueryDataSYNC<T>(string id,                       string order,                       bool isSign,                       bool isLast,                       T defaultValue)    {      try      {        string currTime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");        string currKey = key;        if (isSign)        {          currKey = Utils.GetSign(uid, key, id, order, currTime);          currKey += "&issign=true";        }         string url = sync_url + string.Format("?uid={0}&key={1}&id={2}&order={3}&time={4}",                      uid, currKey, id, order, HttpUtility.UrlEncode(currTime));         string html = Utils.GET_WebRequestHTML("utf-8", url);         if (!string.IsNullOrEmpty(html))          return Utils.JsonToObj<T>(html, defaultValue);      }      catch (Exception ex)      {        throw new Exception(ex.Message);      }       return defaultValue;    }   }   /// <summary>  /// 輔助工具類  /// </summary>  public class Utils  {    public static string GetSign(int uid, string key, string id, string order, string time)    {      string sign = string.Format("uid={0}&key={1}&id={2}&order={3}&time={4}",                    uid,                    key,                    id,                    HttpUtility.UrlEncode(order.ToLower()),                    HttpUtility.UrlEncode(time));       return Md5Encrypt(sign.ToLower(), "utf-8");    }     public static string Md5Encrypt(string strToBeEncrypt, string encodingName)    {      MD5 md5 = new MD5CryptoServiceProvider();      Byte[] FromData = System.Text.Encoding.GetEncoding(encodingName).GetBytes(strToBeEncrypt);      Byte[] TargetData = md5.ComputeHash(FromData);      string Byte2String = "";      for (int i = 0; i < TargetData.Length; i++)      {        Byte2String += TargetData[i].ToString("x2");      }      return Byte2String;    }     public static T GetRequest<T>(string key, T defaultValue)    {      string value = HttpContext.Current.Request[key];       if (string.IsNullOrEmpty(value))      {        return defaultValue;      }      else      {        try        {          return (T)Convert.ChangeType(value, typeof(T));        }        catch        {          return defaultValue;        }      }    }     public static T GetAppConfig<T>(string key, T defaultValue)    {      string value = ConfigurationManager.AppSettings[key];       if (string.IsNullOrEmpty(value))      {        return defaultValue;      }      else      {        try        {          return (T)Convert.ChangeType(value, typeof(T));        }        catch        {          return defaultValue;        }      }    }     public static string ObjToJson<T>(T data)    {      try      {        DataContractJsonSerializer serializer = new DataContractJsonSerializer(data.GetType());        using (MemoryStream ms = new MemoryStream())        {          serializer.WriteObject(ms, data);          return Encoding.UTF8.GetString(ms.ToArray());        }      }      catch      {        return null;      }    }     public static T JsonToObj<T>(string json, T defaultValue)    {      try      {        System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(T));        using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(json)))        {          object obj = serializer.ReadObject(ms);           return (T)Convert.ChangeType(obj, typeof(T));        }      }      catch      {        return defaultValue;      }    }     public static T XmlToObj<T>(string xml, T defaultValue)    {      try      {        System.Runtime.Serialization.DataContractSerializer serializer = new System.Runtime.Serialization.DataContractSerializer(typeof(T));        using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(xml)))        {          object obj = serializer.ReadObject(ms);           return (T)Convert.ChangeType(obj, typeof(T));        }      }      catch      {        return defaultValue;      }    }     public static string ObjToXml<T>(T data)    {      System.Runtime.Serialization.DataContractSerializer serializer = new System.Runtime.Serialization.DataContractSerializer(typeof(T));      using (MemoryStream ms = new MemoryStream())      {        serializer.WriteObject(ms, data);        return Encoding.UTF8.GetString(ms.ToArray());       }    }     public static string GET_WebRequestHTML(string encodingName, string htmlUrl)    {      string html = string.Empty;       try      {        Encoding encoding = Encoding.GetEncoding(encodingName);         WebRequest webRequest = WebRequest.Create(htmlUrl);        HttpWebResponse httpWebResponse = (HttpWebResponse)webRequest.GetResponse();        Stream responseStream = httpWebResponse.GetResponseStream();        StreamReader streamReader = new StreamReader(responseStream, encoding);         html = streamReader.ReadToEnd();         httpWebResponse.Close();        responseStream.Close();        streamReader.Close();      }      catch (WebException ex)      {        throw new Exception(ex.Message);      }       return html;    }     /// <summary>    /// 將網址類容轉換成文本字符串 post請求    /// </summary>    /// <param name="data">要post的數據</param>    /// <param name="url">目標url</param>    /// <returns>服務器響應</returns>    public static string POST_HttpWebRequestHTML( string encodingName,                           string htmlUrl,                           string postData)    {      string html = string.Empty;       try      {        Encoding encoding = Encoding.GetEncoding(encodingName);         byte[] bytesToPost = encoding.GetBytes(postData);         WebRequest webRequest = WebRequest.Create(htmlUrl);        HttpWebRequest httpRequest = webRequest as System.Net.HttpWebRequest;         httpRequest.Method = "POST";        httpRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";        httpRequest.ContentType = "application/x-www-form-urlencoded";        httpRequest.ContentLength = bytesToPost.Length;        httpRequest.Timeout = 15000;        httpRequest.ReadWriteTimeout = 15000;        Stream requestStream = httpRequest.GetRequestStream();        requestStream.Write(bytesToPost, 0, bytesToPost.Length);        requestStream.Close();         HttpWebResponse httpWebResponse = (HttpWebResponse)httpRequest.GetResponse();        Stream responseStream = httpWebResponse.GetResponseStream();        StreamReader streamReader = new StreamReader(responseStream, encoding);         html = streamReader.ReadToEnd();      }      catch (WebException ex)      {        throw new Exception(ex.Message);      }       return html;    }  }   /// <summary>  /// 接口類型  /// </summary>  public enum APIType  {    //同步查詢    SYNC = 1  }