fix: Icon not set on WinUI window

Fixes #107

src/Uno.Templates/content/unoapp/MyExtensionsApp._1.Base/AppHead.xaml.cs

@@ -2,12 +2,9 @@
 #if (useLoggingFallback)
 using System;
 using Microsoft.Extensions.Logging;
+#endif
 using Microsoft.UI.Xaml;
 
-#elif (useCsharpMarkup)
-using Microsoft.UI.Xaml;
-
-#endif
 namespace MyExtensionsApp._1;
 
 public sealed partial class AppHead : App
@@ -25,7 +22,6 @@ public AppHead()
  {
  this.InitializeComponent();
  }
-#if useCsharpMarkup
 
  /// <summary>
  /// Invoked when the application is launched normally by the end user. Other entry points
@@ -34,12 +30,15 @@ public AppHead()
  /// <param name="args">Details about the launch request and process.</param>
  protected override void OnLaunched(LaunchActivatedEventArgs args)
  {
+#if useCsharpMarkup
  Resources.Build(r => r.Merged(
  new AppResources()));
 
+#endif
  base.OnLaunched(args);
+
+ SetWindowsIcon();
  }
-#endif
 #if (useLoggingFallback)
 
  /// <summary>
@@ -113,4 +112,23 @@ private static void InitializeLogging()
 //+:cnd:noEmit
  }
 #endif
+
+ private void SetWindowsIcon()
+ {
+//-:cnd:noEmit
+#if WINDOWS
+ var hWnd =
+ WinRT.Interop.WindowNative.GetWindowHandle(MainWindow);
+
+ // Retrieve the WindowId that corresponds to hWnd.
+ Microsoft.UI.WindowId windowId =
+ Microsoft.UI.Win32Interop.GetWindowIdFromWindow(hWnd);
+
+ // Lastly, retrieve the AppWindow for the current (XAML) WinUI 3 window.
+ Microsoft.UI.Windowing.AppWindow appWindow =
+ Microsoft.UI.Windowing.AppWindow.GetFromWindowId(windowId);
+ appWindow.SetIcon("iconapp.ico");
+#endif
+//+:cnd:noEmit
+ }
 }

src/Uno.Templates/content/unoapp/MyExtensionsApp._1/App.blank.cs

@@ -3,25 +3,25 @@ namespace MyExtensionsApp._1;
 
 public class App : Application
 {
- public static Window? _window;
+ protected Window? MainWindow {get; private set; }
 
  protected override void OnLaunched(LaunchActivatedEventArgs args)
  {
 #if NET6_0_OR_GREATER && WINDOWS && !HAS_UNO
- _window = new Window();
+ MainWindow = new Window();
 #else
- _window = Microsoft.UI.Xaml.Window.Current;
+ MainWindow = Microsoft.UI.Xaml.Window.Current;
 #endif
 
  // Do not repeat app initialization when the Window already has content,
  // just ensure that the window is active
- if (_window.Content is not Frame rootFrame)
+ if (MainWindow.Content is not Frame rootFrame)
  {
  // Create a Frame to act as the navigation context and navigate to the first page
  rootFrame = new Frame();
 
  // Place the frame in the current Window
- _window.Content = rootFrame;
+ MainWindow.Content = rootFrame;
 
  rootFrame.NavigationFailed += OnNavigationFailed;
  }
@@ -35,7 +35,7 @@ protected override void OnLaunched(LaunchActivatedEventArgs args)
  }
 
  // Ensure the current window is active
- _window.Activate();
+ MainWindow.Activate();
  }
 
  /// <summary>

src/Uno.Templates/content/unoapp/MyExtensionsApp._1/App.recommended.cs

@@ -3,8 +3,8 @@ namespace MyExtensionsApp._1;
 
 public class App : Application
 {
- private static Window? _window;
- public static IHost? Host { get; private set; }
+ protected Window? MainWindow {get; private set; }
+ private IHost? Host { get; set; }
 
 //+:cnd:noEmit
 #if useFrameNav
@@ -125,21 +125,21 @@ protected async override void OnLaunched(LaunchActivatedEventArgs args)
  .UseNavigation(RegisterRoutes)
 #endif
  );
- _window = builder.Window;
+ MainWindow = builder.Window;
 
 #if useFrameNav
 //-:cnd:noEmit
  Host = builder.Build();
 
  // Do not repeat app initialization when the Window already has content,
  // just ensure that the window is active
- if (_window.Content is not Frame rootFrame)
+ if (MainWindow.Content is not Frame rootFrame)
  {
  // Create a Frame to act as the navigation context and navigate to the first page
  rootFrame = new Frame();
 
  // Place the frame in the current Window
- _window.Content = rootFrame;
+ MainWindow.Content = rootFrame;
  }
 
  if (rootFrame.Content == null)
@@ -150,7 +150,7 @@ protected async override void OnLaunched(LaunchActivatedEventArgs args)
  rootFrame.Navigate(typeof(MainPage), args.Arguments);
  }
  // Ensure the current window is active
- _window.Activate();
+ MainWindow.Activate();
 //+:cnd:noEmit
 #elif (!useAuthentication)
  Host = await builder.NavigateAsync<Shell>();