private async Task <int> BindingContent(bool requireUpdate = false, string updateStatus = "đang cập nhật...") { try { int updated = 0; this.SetProgressIndicator(true, updateStatus); if (_pageNumber == 0) { _pageNumber = 1; } var feedId = _currentPublisher.FeedIds[_currentIndex]; if (requireUpdate && !NetworkInterface.GetIsNetworkAvailable()) { Messenger.ShowToast("không có mạng..."); requireUpdate = false; } updated = await _viewModel.RefreshLatestData(feedId, _currentPublisher.Id, requireUpdate); _feedManager.SetLastId <Guid>(feedId.ToString()); if (_viewModel.AllItemViewModels.Count == 0) { //this.SetProgressIndicator(false); //Messenger.ShowToast("chưa có tin nào...", completedAction: () => this.BackToPreviousPage()); return(updated); } if (updated > 0) { _viewModel.PagedItemViewModels.Clear(); _pageNumber = 1; } _viewModel.LoadPage(_pageNumber, AppConfig.ShowUnreadItemOnly); UpdateItemReadCount(); UpdateViewTitle(); this.llsItemList.ItemsSource = _viewModel.PagedItemViewModels; CreateAppBar(); if (updated > 0) { llsItemList.ScrollToTop(); } else { llsItemList.ScrollTo <string>(_lastItemId); } this.SetProgressIndicator(false); return(updated); } catch (Exception ex) { throw ex; } }