----------------实体类    [DataContract]    public class SyncResponseEntity    {        public SyncResponseEntity() { }        /// <summary>        /// 需要查询的快递代号        /// </summary>        [DataMember(Order = 0, Name = "id")]        public string ID { get; set; }         /// <summary>        /// 需要查询的快递名称        /// </summary>        [DataMember(Order = 1, Name = "name")]        public string Name { get; set; }         /// <summary>        /// 需要查询的快递单号        /// </summary>        [DataMember(Order = 2, Name = "order")]        public string Order { get; set; }         /// <summary>        /// 消息内容        /// </summary>        [DataMember(Order = 5, Name = "message")]        public string Message { get; set; }         /// <summary>        /// 服务器状态        /// </summary>        [DataMember(Order = 6, Name = "errcode")]        public string ErrCode { get; set; }         /// <summary>        /// 运单状态        /// </summary>        [DataMember(Order = 7, Name = "status")]        public int Status { get; set; }         /// <summary>        /// 跟踪记录        /// </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; }     } ---------调用方法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>        /// 同步单号查询方法        /// </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>    /// 辅助工具类    /// </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 =http://www.mamicode.com/ 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 =http://www.mamicode.com/ 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>        /// 将网址类容转换成文本字符串 post请求        /// </summary>        /// <param name="data">要post的数据</param>        /// <param name="url">目标url</param>        /// <returns>服务器响应</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>    /// 接口类型    /// </summary>    public enum APIType    {        //同步查询        SYNC = 1    } 基本上代码都在上面。在带www.kuaidiapi.cn上申请一个uid就大功告成。