Enhancement searchBar but does not work

MangaMap/Model/Manager.cs

@@ -1,19 +1,41 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.ComponentModel;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using System.Text;
 using System.Threading.Tasks;
+using MangaMap.DataBinding;
 using MangaMap.Stub;
 
 namespace MangaMap.Model
 {
-    public class Manager
+    public class Manager : System.ComponentModel.INotifyPropertyChanged
     {
+        public event PropertyChangedEventHandler? PropertyChanged;
+
+        void OnPropertyChanged([CallerMemberName] string propertyName = null)
+        => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+
         public IPersistanceManager Persistance { get; set; }
         public List<Admin> Admins { get; private set; }
         public List<Utilisateur> Utilisateurs { get; private set; }
-        public ObservableCollection<Oeuvre> Oeuvres { get; private set; }
+
+        private ObservableCollection<Oeuvre> oeuvres;
+
+        public ObservableCollection<Oeuvre> Oeuvres 
+        { 
+            get
+            {
+                return oeuvres;
+            }
+            set
+            {
+                oeuvres = value;
+                OnPropertyChanged();
+            }
+        }
 
         public Utilisateur UtilisateurActuel { get; set; }
         public bool isAdmin { get; set; }

MangaMap/Views/homePage.xaml

@@ -20,8 +20,9 @@
             <VerticalStackLayout
             VerticalOptions="Center">
 
-                <SearchBar Placeholder="Recherche"
-                       CancelButtonColor="Orange"
+                <SearchBar 
+                        Placeholder="Recherche"
+                        TextChanged="OnTextChanged"
                         TextColor="Black"
                         BackgroundColor="White"
                         HorizontalTextAlignment="Center"
@@ -63,6 +64,8 @@
                 </ScrollView>
 
                 
+
+
                 <!--<ListView x:Name="a1" ItemsSource="{Binding Utilisateurs}">
                     
                     <ListView.ItemTemplate>

MangaMap/Views/homePage.xaml.cs

@@ -1,12 +1,14 @@
 namespace MangaMap.Views;
 
 using MangaMap.Model;
-
+using System.Collections.ObjectModel;
 
 public partial class homePage : ContentPage
 {
     public Manager my_manager => (App.Current as App).MyManager;
 
+    private ObservableCollection<Oeuvre> filteredOeuvres = new ObservableCollection<Oeuvre>();
+
     public homePage()
     {
         InitializeComponent();
@@ -67,4 +69,16 @@ public partial class homePage : ContentPage
         }
     }
 
+    private void OnTextChanged(object sender, TextChangedEventArgs e)
+    {
+        if(string.IsNullOrEmpty(e.NewTextValue))
+        {
+            searchResults.ItemsSource = my_manager.Oeuvres;
+        }
+        else
+        {
+            searchResults.ItemsSource = my_manager.Oeuvres.Where(i => i.Nom.ToLower().Contains(e.NewTextValue.ToLower()));
+        }
+    }
+
 }