private void GetMiniAppsTask(int index)
        {
            byte[] da   = null;
            string json = null;
            AllCountRequestJsonModel <MerchantAppModel> list = null;

            try
            {
                using (WebClient wc = new WebClient())
                {
                    da   = wc.DownloadDataTaskAsync(appsUrl + index).Result;
                    json = Encoding.UTF8.GetString(da);
                    list = JsonConvert.DeserializeObject <AllCountRequestJsonModel <MerchantAppModel> >(json);
                    if (list == null || list.code != 0)
                    {
                        return;
                    }
                    MongoDBContext.MerchantAppModelContext.GetCollection().InsertMany(list.data.list);
                    da   = null;
                    json = null;
                    list = null;
                }
            }
            catch (Exception e)
            {
                e.Save();
                da   = null;
                json = null;
                list = null;
            }
        }
        private void RefreshMerchantsApps()
        {
            byte[] da   = null;
            string json = null;
            AllCountRequestJsonModel <MerchantAppModel> list = null;

            try
            {
                using (WebClient wcc = new WebClient())
                {
                    da = wcc.DownloadData(appsUrl + 1);
                    //var json = wcc.DownloadStringTaskAsync(merchantsUrl + 1).Result;
                    json = Encoding.UTF8.GetString(da);
                    //var json = wcc.DownloadStringTaskAsync(appsUrl + 1).Result;
                    list = JsonConvert.DeserializeObject <AllCountRequestJsonModel <MerchantAppModel> >(json);
                    var         pageSum     = list.data.maxpage;
                    TaskFactory taskFactory = new TaskFactory();
                    //Task[] tasks = new Task[pageSum];
                    var tasks = new List <Task>();

                    var pageIndexs = new List <int>();
                    for (int i = 0; i < pageSum; i++)
                    {
                        pageIndexs.Add(i + 1);
                    }
                    foreach (var item in pageIndexs)
                    {
                        tasks.Add(taskFactory.StartNew(() => GetMiniAppsTask(item)));
                    }
                    taskFactory.ContinueWhenAll(tasks.ToArray(), t =>
                    {
                        taskFactory = null; tasks = null; pageIndexs = null;
                    });
                    MongoDBContext.MerchantAppModelContext.GetCollection().DeleteMany(MongoDBContext.MerchantAppModelContext.Filter.Empty);
                }
            }
            catch (Exception e) { e.Save(); }
        }