void ClearQC()
        {
            ClassLoger.Info("ClearQCPicJob.ClearQC", "定时清理图片文件任务启动");

            string key = CacheKey.GetQrCodeKey(DateTime.Now.AddDays(-1));

            if (RedisBase.ContainsKey(key))
            {
                int i = 0;
                while (IsWork)
                {
                    List <string> qcimageList = RedisBase.List_GetList <string>(key, i, 1000);
                    foreach (string pathStr in qcimageList)
                    {
                        try
                        {
                            if (File.Exists(pathStr))
                            {
                                File.Delete(pathStr);
                            }
                        }
                        catch (Exception ex) { }
                    }
                    i++;
                    if (qcimageList == null || qcimageList.Count == 0)
                    {
                        break;
                    }
                }

                RedisBase.List_RemoveAll <string>(key);
            }

            ClassLoger.Info("ClearQCPicJob.ClearQC", "图片文件清理完毕");
        }