private async void Button_Click(object sender, RoutedEventArgs e) { var f = FeedListDataProvider.GetProvider(FeedListType.UserPageList, await NetworkHelper.GetUserIDByName(uid.Text)); if (f != null) { UIHelper.Navigate(typeof(FeedListPage), f); } }
protected override void OnNavigatedTo(NavigationEventArgs e) { base.OnNavigatedTo(e); provider = e.Parameter as FeedListDataProvider; listView.ItemsSource = provider.itemCollection; switch (provider.ListType) { case FeedListType.UserPageList: titleBar.ComboBoxVisibility = Visibility.Collapsed; break; case FeedListType.TagPageList: titleBar.ComboBoxVisibility = Visibility.Visible; titleBar.ComboBoxItemsSource = new string[] { "最近回复", "按时间排序", "按热度排序" }; titleBar.ComboBoxSelectedIndex = (provider as ICanChangeSelectedIndex).SelectedIndex; break; case FeedListType.DyhPageList: titleBar.ComboBoxVisibility = Visibility.Collapsed; titleBar.ComboBoxItemsSource = new string[] { "精选", "广场" }; break; } Refresh(); if (VScrollViewer is null) { Task.Run(async() => { await Task.Delay(300); await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () => { VScrollViewer = VisualTree.FindDescendantByName(listView, "ScrollViewer") as ScrollViewer; VScrollViewer.ViewChanged += async(s, ee) => { if (!ee.IsIntermediate && VScrollViewer.VerticalOffset == VScrollViewer.ScrollableHeight) { UIHelper.ShowProgressBar(); await provider.LoadNextPage(); UIHelper.HideProgressBar(); } }; }); }); } }