public SchedulePage() { InitializeComponent(); GetUrl get = new GetUrl(); Url = get.GetScheduleUrl(); classUrl = get.GetClassUrl(); _ = ClassGetListAsync(); GetStringFromKey SchedulegetTextFromKey = new GetStringFromKey("day_key"); pickerdayofweek.SelectedIndex = (SchedulegetTextFromKey.GetText() == "") ? 0 : int.Parse(SchedulegetTextFromKey.GetText()); numChanged = WeekCheck(pickerdayofweek.Items[pickerdayofweek.SelectedIndex]); myList.ItemTapped += (object sender, ItemTappedEventArgs e) => { if (e.Item == null) { return; } ((ListView)sender).SelectedItem = null; }; _ = OnGetListAsync(); }