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();
}
};
});
});
}
}
