是否可以从MVVM弹出DisplayPromptAsync

public class MyViewModel : INotifyPropertyChanged
{
    public ICommand PromptCommand { get; private set; }

    private string userInput;
    public string UserInput
    {
        get { return userInput; }
        set
        {
            userInput = value;
            OnPropertyChanged(nameof(UserInput));
        }
    }

    public MyViewModel()
    {
        PromptCommand = new Command(async () =>
        {
            UserInput = await Application.Current.MainPage.DisplayPromptAsync("Input", "Please enter something:");
        });
    }

    // INotifyPropertyChanged implementation...
}

<ContentPage.BindingContext>
    <local:MyViewModel />
</ContentPage.BindingContext>

<StackLayout>
    <Button Text="Prompt" Command="{Binding PromptCommand}" />
    <Label Text="{Binding UserInput}" />
</StackLayout>