public MainPageViewModel(INavigationService navigationService)
{
_navigationService = navigationService;
Picker1Source.Add("A");
Picker1Source.Add("B");
Picker1Source.Add("C");
Picker1Command = new DelegateCommand(() =>
{
Label1 = $"Picke1 = {Picker1SelectedItem}";
Label2 = "";
Picker2Source.Clear();
for (int i = 0; i < 20; i++)
{
Picker2Source.Add($"{Picker1SelectedItem} {i}");
}
});
Picker2Command = new DelegateCommand(() =>
{
Label2 = $"Picke2 = {Picker2SelectedItem}";
});
}
public MainPageViewModel(INavigationService navigationService)
{
_navigationService = navigationService;
Picker1SelectedCommand = new DelegateCommand(async() =>
{
var fooBackup = Picker2SelectedItem;
// 變更到最新的 Picker2 的可選取清單
Picker2Source = PickerSource.GetPickr2Source(Picker1SelectedItem);
if (Picker2Source.Contains(fooBackup))
{
await Task.Delay(100);
Picker2SelectedItem = Picker2Source.FirstOrDefault(x => x == fooBackup);
}
});
}
void OnPicker1SelectedItemChanged()
{
try
{
if (Picker1SelectedItem != null)
{
var temp = GenPicker2(Picker1SelectedItem);
Picker2Source.Clear();
foreach (var item in temp)
{
Picker2Source.Add(item);
}
}
}
catch { }
}
