Code Quality: Fixed two way binding for filter header (#17400)

Author: yaira2

src/Files.App/ViewModels/ShellViewModel.cs

@@ -777,7 +777,18 @@ public void UpdateEmptyTextType()
 		public string? FilesAndFoldersFilter
 		{
 			get => _filesAndFoldersFilter;
-			set => SetProperty(ref _filesAndFoldersFilter, value);
+			set
+			{
+				if (SetProperty(ref _filesAndFoldersFilter, value))
+				{
+					FilesAndFolderFilterUpdated();
+				}
+			}
+		}
+
+		private void FilesAndFolderFilterUpdated()
+		{
+			_ = ApplyFilesAndFoldersChangesAsync();
 		}
 
 
@@ -1894,7 +1905,6 @@ await Task.Run(async () =>
 						});
 
 						filesAndFolders.AddRange(fileList);
-						FilesAndFoldersFilter = null;
 
 						await OrderFilesAndFoldersAsync();
 						await ApplyFilesAndFoldersChangesAsync();
@@ -1903,6 +1913,7 @@ await dispatcherQueue.EnqueueOrInvokeAsync(() =>
 						{
 							GetDesktopIniFileData();
 							CheckForBackgroundImage();
+							FilesAndFoldersFilter = null;
 						},
 						Microsoft.UI.Dispatching.DispatcherQueuePriority.Low);
 					});

src/Files.App/Views/Shells/ModernShellPage.xaml

@@ -149,7 +149,7 @@
 					VerticalAlignment="Center"
 					PlaceholderText="{helpers:ResourceString Name=Filename}"
 					PreviewKeyDown="FilterTextBox_PreviewKeyDown"
-					TextChanged="FilterTextBox_TextChanged" />
+					Text="{x:Bind ShellViewModel.FilesAndFoldersFilter, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
 			</StackPanel>
 		</Grid>
 

src/Files.App/Views/Shells/ModernShellPage.xaml.cs

@@ -45,7 +45,6 @@ public ModernShellPage() : base(new CurrentInstanceViewModel())
 			ShellViewModel.PageTypeUpdated += FilesystemViewModel_PageTypeUpdated;
 			ShellViewModel.OnSelectionRequestedEvent += FilesystemViewModel_OnSelectionRequestedEvent;
 			ShellViewModel.GitDirectoryUpdated += FilesystemViewModel_GitDirectoryUpdated;
-			ShellViewModel.DirectoryInfoUpdated += ShellViewModel_DirectoryInfoUpdated;
 			ShellViewModel.FocusFilterHeader += ShellViewModel_FocusFilterHeader;
 
 			ToolbarViewModel.PathControlDisplayText = Strings.Home.GetLocalizedResource();
@@ -63,13 +62,6 @@ private async void ShellViewModel_FocusFilterHeader(object sender, EventArgs e)
 				FilterTextBox.Focus(FocusState.Programmatic);
 		}
 
-		private void ShellViewModel_DirectoryInfoUpdated(object sender, EventArgs e)
-		{
-			// Regular binding causes issues when refreshing the directory so we set the text manually
-			if (FilterTextBox?.IsLoaded ?? false)
-				FilterTextBox.Text = ShellViewModel.FilesAndFoldersFilter ?? string.Empty;
-		}
-
 		private void ModernShellPage_RefreshWidgetsRequested(object sender, EventArgs e)
 		{
 			if (ItemDisplayFrame?.Content is HomePage currentPage)
@@ -342,16 +334,6 @@ public override void NavigateToPath(string? navigationPath, Type? sourcePageType
 			ToolbarViewModel.PathControlDisplayText = ShellViewModel.WorkingDirectory;
 		}
 
-		private async void FilterTextBox_TextChanged(AutoSuggestBox sender, AutoSuggestBoxTextChangedEventArgs args)
-		{
-			if (args.Reason is AutoSuggestionBoxTextChangeReason.UserInput)
-			{
-				ShellViewModel.FilesAndFoldersFilter = sender.Text;
-				await ShellViewModel.ApplyFilesAndFoldersChangesAsync();
-			}
-
-		}
-
 		private void FilterTextBox_PreviewKeyDown(object sender, KeyRoutedEventArgs e)
 		{
 			if (e.Key is VirtualKey.Escape &&