private async void ListBox_Click(object sender, TappedRoutedEventArgs e) { var seletedItem = ((ListBox)sender).SelectedItem as DjRadiosItem; ProgressBar_Loading.Visibility = Visibility.Visible; RadioPrograms radioPrograms = await DjRadioService.GetRadioSongItem(seletedItem.Id); if (radioPrograms == null) { ProgressBar_Loading.Visibility = Visibility.Collapsed; NotifyPopup notifyPopup = new NotifyPopup("获取失败"); notifyPopup.Show(); return; } ProgressBar_Loading.Visibility = Visibility.Collapsed; Frame.Navigate(typeof(RadioDetail), radioPrograms.Programs); }