关于串通京东接口的demo

 public string Get(int id)
        {

            JObject o = new JObject(
                new JProperty("billNo", "ESL1363593563"),
                new JProperty("billType", "24"),
                new JProperty("pageNo", "1"),
                new JProperty("pageSize", "10"),
                new JProperty("queryType ", "1")
                );
            //压缩str,用于得到sign的值
            string str = "360buy_param_json" + o.ToString() + "access_token" + 123 + "app_key" + 123 + "method" + 123 + "timestamp=" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "v2.0";
            //完整str
            string str1 = "360buy_param_json=" + o.ToString() + "&access_token=" + 123 + "&app_key=" + 123 + "&method=" + 123 + "&timestamp=" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "&v=2.0";

            string end = "yourappSecret" + str + "yourappSecret";
            string md5 = StrToMD5(end);//得出来sign  
            //最后拼接url：
            string endstr = str1 + "&sign=" + md5;
            //经常用到url中含有中文字符的需要对其进行字符串编码和解码，所以这里就用了这个System.Web.HttpUtility.UrlEncode，
            c#asp.net url 传递中文参数要使用 System.Web.HttpUtility.UrlEncode 而不能使用Server.UrlEncode
            string allStr = System.Web.HttpUtility.UrlEncode(endstr, System.Text.Encoding.UTF8);
            byte[] bufferB = Encoding.UTF8.GetBytes(allStr); 
            System.Net.ServicePointManager.DefaultConnectionLimit = 200;
            HttpWebRequest WebReq = (HttpWebRequest)WebRequest.Create("www.cctv.com"); 
            WebReq.Method = "POST";
            WebReq.ContentType = "application/x-www-form-urlencoded";
            WebReq.ContentLength = allStr.Length;
            Stream PostData = WebReq.GetRequestStream();
            PostData.Write(bufferB, 0, bufferB.Length);
            PostData.Close();

            HttpWebResponse WebResp = (HttpWebResponse)WebReq.GetResponse();
            StreamReader sr = new StreamReader(WebResp.GetResponseStream(), System.Text.Encoding.UTF8);
            string backstr = sr.ReadToEnd();
            backstr = HttpUtility.UrlDecode(backstr);
            Console.WriteLine(WebResp.StatusCode);
            Console.WriteLine(WebResp.Server);
            Stream Answer = WebResp.GetResponseStream();
            StreamReader _Answer = new StreamReader(Answer);
            Console.WriteLine(_Answer.ReadToEnd());
            return _Answer.ReadToEnd();
          
        }

        {
            return val.TrimStart(c).TrimEnd(c);
        }

        private static string GetSignature(IDictionary<string, string> parameters, string secret)
        {
            // 先将参数以其参数名的字典序升序进行排序
            IDictionary<string, string> sortedParams = new SortedDictionary<string, string>(parameters);
            IEnumerator<KeyValuePair<string, string>> iterator = sortedParams.GetEnumerator();

            // 遍历排序后的字典，将所有参数按"keyvaluekeyvalue"格式拼接在一起
            StringBuilder basestring = new StringBuilder();
            while (iterator.MoveNext())
            {
                string key = iterator.Current.Key;
                string value = iterator.Current.Value.ToString();
                if (!string.IsNullOrEmpty(key) && value != null)
                {
                    basestring.Append(key).Append(value);
                }
            }

            // 使用MD5对待签名串求签
            string upperCaseStr = StrToMD5(basestring.ToString());
            string result = StrToMD5(upperCaseStr + secret);
            return result;
        }

        private static string StrToMD5(string str)
        {
            byte[] data = Encoding.UTF8.GetBytes(str);
            MD5 md5 = new MD5CryptoServiceProvider();
            byte[] OutBytes = md5.ComputeHash(data);

            string OutString = "";
            for (int i = 0; i < OutBytes.Length; i++)
            {
                OutString += OutBytes[i].ToString("x2");
            }
            return OutString.ToUpper();
        }