C# 调用LAKALA接口获取静态二维码数据

本实例是通过WinForm程序（C#开发）调用的拉卡拉静态二维码接口，获取静态二维码信息，具体调用过程如下:

• 定义基本对象类

 public class orderExtInfoData
    {
    }

 public class reqDataData
    {
        public string termId { get; set; }
        public string shopNo { get; set; }
    }

 public class termExtInfoData
    {
    }

  public class PostLakalaData
    {
        public string ver { get; set; }
        public string appid { get; set; }
        public string sign { get; set; }
        public string channel { get; set; }
        public string rnd { get; set; }
        public string cmd { get; set; }
        public string productType { get; set; }
        public string token { get; set; }
        public string timestamp { get; set; }
        public string reqId { get; set; }
        public reqDataData reqData = new reqDataData();
        public orderExtInfoData orderExtInfo = new orderExtInfoData();
        public termExtInfoData termExtInfo = new termExtInfoData();
    }

• 整理提交接口数据

     /// <summary>
        /// 获取PostData数据
        /// </summary>
        /// <returns></returns>
        public string  GetPostLakalaData()
        {
            string secretKey = "f6cc7030b8c0ba07a6da488362f2748e";
            PostLakalaData postData = new PostLakalaData();
            postData.ver = "1.0.0";
            postData.appid = "qm1624980136"; //拉卡拉授权提供
            postData.productType = "LKL_APP_QR";//拉卡拉授权提供
            postData.token = "43e99b4a38a748d3932fca9382404b41";//拉卡拉授权提供
            postData.cmd = "QR_ORDER_BIND_CODE_CREATE";//指令
            postData.channel = "LAKALA";//渠道
          
            postData.rnd = Guid.NewGuid().ToString().Replace("-", "").Substring(0, 32);//随机数
            postData.timestamp = DateTimeUtil.Timestamp(DateTime.Now);//时间戳
            postData.reqId = Guid.NewGuid().ToString().Replace("-", "").Substring(0, 32);//请求序列(具体传值待确认)
            reqDataData reqDataDataref = new reqDataData();
            reqDataDataref.termId = txttermId.Text;// 拉卡拉授权提供;
            reqDataDataref.shopNo = txtshopNo.Text;//拉卡拉授权提供;
            postData.reqData= reqDataDataref;
            postData.sign = GetSign(reqDataDataref, secretKey);//对reqData，进行签名,注意不能有空格
            orderExtInfoData oeinfodata = new orderExtInfoData();
            postData.orderExtInfo=oeinfodata;
            termExtInfoData termExtInfodata = new termExtInfoData();
            postData.termExtInfo=termExtInfodata;
            return  JsonConvert.SerializeObject(postData); 
        }

   /// <summary>
        /// 转换Sign数据
        /// </summary>
        /// <param name="reqDataDataref"></param>
        /// <param name="secretKey"></param>
        /// <returns></returns>
        private string GetSign(reqDataData reqDataDataref,string secretKey)
        {
            if (reqDataDataref == null)
                return "";
            string sign = "shopNo="+ reqDataDataref.shopNo+ "" +  "|termId=" + reqDataDataref.termId+ "|"+ secretKey;
            return GetMD5(sign).ToUpper();
        }

   /// <summary>
        /// Md5加密
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string GetMD5(string s)
        {
            MD5 md5 = new MD5CryptoServiceProvider();
            byte[] t = md5.ComputeHash(Encoding.GetEncoding("utf-8").GetBytes(s));
            StringBuilder sb = new StringBuilder(32);
            for (int i = 0; i < t.Length; i++)
            {
                sb.Append(t[i].ToString("x").PadLeft(2, '0'));
            }
            return sb.ToString();
        }

• 提交调用数据

      private void button1_Click(object sender, EventArgs e)
        {
            string statuscode = "";
            string reslutdata = HttpClientHelper.PostResponse(txtUrl.Text,txtPostData.Text,out statuscode); 
            txtResponseData.Text = reslutdata;
            JObject obj = (JObject)JsonConvert.DeserializeObject(reslutdata);
            ResponseLakalaData rk = new ResponseLakalaData();
            rk.retCode = obj["retCode"].ToString();
            rk.retMsg = obj["retMsg"].ToString();
            string redatasss = obj["respData"].ToString();
            JObject objreq = (JObject)JsonConvert.DeserializeObject(redatasss);
            rk.reqsData = new respLakalaData();
            rk.reqsData.code = objreq["code"].ToString();
            rk.reqsData.codeImage = objreq["codeImage"].ToString();
            txtStatusCode.Text = statuscode;
            MessageBox.Show(rk.reqsData.code);
        }

 public class HttpClientHelper
    {
        public static string PostResponse(string url, string postData, out string statusCode)
        {
            string result = string.Empty;
            //设置Http的正文
            HttpContent httpContent = new StringContent(postData);
            //设置Http的内容标头
            httpContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");
            //设置Http的内容标头的字符
            httpContent.Headers.ContentType.CharSet = "utf-8";
            using (HttpClient httpClient = new HttpClient())
            {
                //异步Post
                HttpResponseMessage response = httpClient.PostAsync(url, httpContent).Result;
                //输出Http响应状态码
                statusCode = response.StatusCode.ToString();
                //确保Http响应成功
                if (response.IsSuccessStatusCode)
                {
                    //异步读取json
                    result = response.Content.ReadAsStringAsync().Result;
                }
            }
            return result;
        }
       
    }

 

   

    第一次做拉卡拉接口调用的功能，调用的接口功能虽然简单，但是网上并没有合适的资料供参考（拉卡拉也不给提供一个），故自行摸索逐一实现，发表出来是希望对做Winform开发的朋友提供一个参考，避免一些不必要的坑，比如对SIGN的加密过程、PostResponse的调用实现等。