.NET MAUI设置Windows环境初始窗口大小

参考：https://www.likecs.com/ask-10337653.html#sc=200
【解决方案1】
根目录下的App.xaml.cs

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//设置界面宽高 #if WINDOWS using Microsoft.UI; using Microsoft.UI.Windowing; using Windows.Graphics; #endif   namespace MauiAppForWin {     public partial class App : Application     {         const int WindowWidth = 480;         const int WindowHeight = 800;           public App()         {             InitializeComponent();               MainPage = new MainPage();               //使用MainPage的页面配置             //var width = (int)MainPage.WidthRequest;             //var height = (int)MainPage.HeightRequest;               Microsoft.Maui.Handlers.WindowHandler.Mapper.AppendToMapping(nameof(IWindow), (handler, view) =>             {                 //设置界面宽高 #if WINDOWS             var mauiWindow = handler.VirtualView;             var nativeWindow = handler.PlatformView;             nativeWindow.Activate();             IntPtr windowHandle = WinRT.Interop.WindowNative.GetWindowHandle(nativeWindow);             WindowId windowId = Microsoft.UI.Win32Interop.GetWindowIdFromWindow(windowHandle);             AppWindow appWindow = Microsoft.UI.Windowing.AppWindow.GetFromWindowId(windowId);             appWindow.Resize(new SizeInt32(WindowWidth, WindowHeight)); #endif             });           }     } }

【解决方案2】
目录：Platforms/Windows/App.xaml.cs
重写OnLaunched

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using Microsoft.UI.Xaml; // To learn more about WinUI, the WinUI project structure, // and more about our project templates, see: http://aka.ms/winui-project-info. //设置界面宽高 using Microsoft.UI; using Microsoft.UI.Windowing; using Windows.Graphics; using WinRT.Interop;   namespace MauiAppForWin.WinUI {     /// <summary>     /// Provides application-specific behavior to supplement the default Application class.     /// </summary>     public partial class App : MauiWinUIApplication     {         /// <summary>         /// Initializes the singleton application object.  This is the first line of authored code         /// executed, and as such is the logical equivalent of main() or WinMain().         /// </summary>         public App()         {             this.InitializeComponent();         }           /// <summary>         /// 设置界面宽高         /// </summary>         /// <param name="args"></param>         protected override void OnLaunched(LaunchActivatedEventArgs args)         {             base.OnLaunched(args);             var currentWindow = Application.Windows[0].Handler.PlatformView;             IntPtr _windowHandle = WindowNative.GetWindowHandle(currentWindow);             var windowId = Win32Interop.GetWindowIdFromWindow(_windowHandle);               AppWindow appWindow = AppWindow.GetFromWindowId(windowId);             appWindow.Resize(new SizeInt32(350, 600));         }         protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();     } }