PocketBook/Sources/BookApp/ViewModel/ViewModelNavigation.cs

using ToolKit;
using System.Windows.Input;
using System.Collections.ObjectModel;

namespace BookApp.ViewModel
{
    public class NavigationViewModel : BaseViewModel
    {
        public NavigationViewModel() { }

        private async void OnSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (e.CurrentSelection.FirstOrDefault() is ViewModelMenu selectedItem)
            {
                if (!string.IsNullOrWhiteSpace(selectedItem.Route))
                {
                    Type pageType = Type.GetType("BookApp.Pages." + selectedItem.Route);
                    if (pageType == null)
                    {
                        return;
                    }

                    Page pageInstance = (Page)Activator.CreateInstance(pageType);
                    // await Navigation.PushAsync(pageInstance);
                }
                else
                {
                    Console.WriteLine("Erreur trouvé");
                }
            }
        }

        async void ButtonTous(object sender, EventArgs args)
        {
            await Shell.Current.GoToAsync("TousPage");
        }

        async void ButtonAuteur(object sender, EventArgs args)
        {
            await Shell.Current.GoToAsync("FiltragePage");
        }
    }
}