[Windows] Fix for SearchHandler Fails to Display Results.

src/Controls/src/Core/Handlers/Shell/ShellItemHandler.Windows.cs

@@ -267,7 +267,7 @@ void UpdateSearchHandler()
 					autoSuggestBox.PlaceholderText = _currentSearchHandler.Placeholder;
 					autoSuggestBox.IsEnabled = _currentSearchHandler.IsSearchEnabled;
 					autoSuggestBox.ItemsSource = CreateSearchHandlerItemsSource();
-					autoSuggestBox.ItemTemplate = (UI.Xaml.DataTemplate)WApp.Current.Resources["SearchHandlerItemTemplate"];
+					autoSuggestBox.ItemTemplate = _currentSearchHandler.ItemTemplate is null ? null : (UI.Xaml.DataTemplate)WApp.Current.Resources["SearchHandlerItemTemplate"];
 					autoSuggestBox.Text = _currentSearchHandler.Query;
 					autoSuggestBox.UpdateTextOnSelect = false;
 
@@ -338,11 +338,18 @@ void OnSearchBoxQuerySubmitted(Microsoft.UI.Xaml.Controls.AutoSuggestBox sender,
 			if (_currentSearchHandler == null)
 				return null;
 
-			if (_currentSearchHandler.ItemsSource == null)
-				return _currentSearchHandler.ItemsSource;
+			var itemsSource = _currentSearchHandler.ItemsSource;
+			var itemTemplate = _currentSearchHandler.ItemTemplate;
 
-			return TemplatedItemSourceFactory.Create(_currentSearchHandler.ItemsSource, _currentSearchHandler.ItemTemplate, _currentSearchHandler,
+			if (itemTemplate is not null && itemsSource is not null)
+			{
+				return TemplatedItemSourceFactory.Create(itemsSource, itemTemplate, _currentSearchHandler,
 				null, null, null, MauiContext);
+			}
+			else
+			{
+				return itemsSource;
+			}
 		}
 
 		void OnCurrentSearchHandlerPropertyChanged(object? sender, PropertyChangedEventArgs e)

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/XFIssue/ShellSearchHandlerItemSizing.cs

@@ -1,6 +1,5 @@
-#if TEST_FAILS_ON_WINDOWS && TEST_FAILS_ON_ANDROID && TEST_FAILS_ON_CATALYST // In Android and Catalyst AutomationId is not working for SearchHandler, in Windows searchresults was not shown More Information: /~https://github.com/dotnet/maui/issues/26477
-using UITest.Appium;
-using NUnit.Framework; 
+using UITest.Appium;
+using NUnit.Framework;
 using UITest.Core;
 
 namespace Microsoft.Maui.TestCases.Tests.Issues;
@@ -13,15 +12,32 @@ public ShellSearchHandlerItemSizing(TestDevice testDevice) : base(testDevice)
 
 	public override string Issue => "Shell Search Handler Item Sizing";
 
+#if IOS || MACCATALYST
 	[Test]
 	[Category(UITestCategories.Shell)]
 	public void SearchHandlerSizesCorrectly()
 	{
 		App.WaitForElement("Instructions");
-		App.EnterText(AppiumQuery.ByXPath("//XCUIElementTypeSearchField"),"Hello");
+		App.EnterText(AppiumQuery.ByXPath("//XCUIElementTypeSearchField"), "Hello");
 		var contentSize = App.WaitForElement("searchresult").GetRect();
 		Assert.That(contentSize.Height, Is.LessThan(100));
+	}
+#endif
 
+	// For Windows and Android, the test is failing because it cannot retrieve the search result.
+	// Therefore, verify it using VerifyScreenshot.
+#if ANDROID || WINDOWS
+	[Test]
+	[Category(UITestCategories.Shell)]
+	public void VerifySearchHandlerItemsAreVisible()
+	{
+		App.WaitForElement("Instructions");
+#if WINDOWS
+		App.EnterText("TextBox", "Hello");
+#else
+		App.EnterText(AppiumQuery.ByXPath("//android.widget.EditText"), "Hello");
+#endif
+		VerifyScreenshot();
 	}
-}
-#endif
+#endif
+}