Window doesn't maximize in WinUI3-CodePudding

I am using the following code to start a WinUI3 App maximized:

    public MainWindow()
    {
        this.InitializeComponent();
        var windowHandle = WinRT.Interop.WindowNative.GetWindowHandle(this);
        var windowId = Win32Interop.GetWindowIdFromWindow(windowHandle);
        AppWindow appWindow = AppWindow.GetFromWindowId(windowId);
        OverlappedPresenter presenter = (OverlappedPresenter)appWindow.Presenter;
        presenter.Maximize();
        Debug.WriteLine(presenter.State);
    }

There are no errors, debug output reports the OverlappedPresenter state as Maximized, but the window stays in the restored state.

Any suggestions are welcome, thanks in advance.

CodePudding user response：

Try putting Maximize() in App's OnLaunched method:

    protected override void OnLaunched(LaunchActivatedEventArgs args)
    {
        ...
        presenter.Maximize();
    }

Or the Window's OnActivated event:

    private void OnActivated(object sender, WindowActivatedEventArgs args)
    {
        ...
        presenter.Maximize();
    }