WinUI Window doesn't resize, if moving to other monitor with different resolution/dpi

Question

Hi,
the window doesn't adapt it's size to the other monitor.
I'm defining the size in the grid within the window and set the size for the window in the MainWindow. See the images and code below:

First monitor:

2nd monitor:

Window:

<Window  
    x:Class="App1.MainWindow"  
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
    xmlns:local="using:App1"  
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"  
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"  
    mc:Ignorable="d">  
  
    <Grid  HorizontalAlignment="Left"   
           VerticalAlignment="Top"   
           Height="610"   
           MinWidth="1100"  
           MinHeight="800">  
        <NavigationView x:Name="nvSample" ItemInvoked="nvSample_ItemInvoked" PaneDisplayMode="Top" IsBackButtonVisible="Collapsed" IsSettingsVisible="False">  
            <NavigationView.MenuItems>  
                <NavigationViewItem  Content="test 1" Tag="SamplePage1" />  
                <NavigationViewItem  Content="test 2" Tag="SamplePage2" />  
                <NavigationViewItem  Content="test 3" Tag="SamplePage3" />  
                <NavigationViewItem  Content="test 4" Tag="SamplePage4" />  
                <NavigationViewItem  Content="test 5" Tag="SamplePage4" />  
            </NavigationView.MenuItems>  
            <!--<Frame x:Name="contentFrame"/>-->  
        </NavigationView>  
        <Button x:Name="myButton" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="50,110,0,0" Click="myButton_Click" Content="Clic"/>  
        <Button x:Name="btnClose" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="50,380,0,0"  Click="btnClose_Click" Content="Clic"/>  
  
        <!--<StackPanel x:Name="pnlSettings" Height="570" Width="190" HorizontalAlignment="Right" VerticalAlignment="Top" Background="Yellow"></StackPanel>-->  
          
        <SplitView x:Name="splitView"                  
                   IsPaneOpen="False"   
                   OpenPaneLength="300"   
                   CompactPaneLength="48"  
                   DisplayMode="Overlay"  
                   PanePlacement="Right">  
            <SplitView.Pane>  
                <Grid>  
                    <Grid.RowDefinitions>  
                        <RowDefinition Height="Auto"/>  
                        <RowDefinition Height="*"/>  
                        <RowDefinition Height="Auto"/>  
                    </Grid.RowDefinitions>  
                    <ToggleSwitch AutomationProperties.Name="simple ToggleSwitch"/>  
                    <TextBlock Text="PANE CONTENT" x:Name="PaneHeader" Margin="60,12,0,0" Style="{StaticResource BaseTextBlockStyle}"/>  
                    <!--<ListView x:Name="NavLinksList" Margin="0,12,0,0" SelectionMode="Single" Grid.Row="1" VerticalAlignment="Stretch"  
                    ItemClick="NavLinksList_ItemClick" IsItemClickEnabled="True"/>-->  
                    <StackPanel Orientation="Horizontal" Grid.Row="2" Margin="14,24,0,24" >  
                        <SymbolIcon Symbol="Setting" />  
                        <TextBlock Text="Settings" Margin="24,0,0,0" VerticalAlignment="Center"/>  
                    </StackPanel>  
                </Grid>  
            </SplitView.Pane>  
  
            <!--<Grid>  
                <Grid.RowDefinitions>  
                    <RowDefinition Height="Auto"/>  
                    <RowDefinition Height="*"/>  
                </Grid.RowDefinitions>  
                <TextBlock Text="SPLITVIEW CONTENT" Margin="12,12,0,0" Style="{StaticResource BaseTextBlockStyle}"/>  
                <TextBlock x:Name="content" Grid.Row="1" Margin="12,12,0,0" Style="{StaticResource BodyTextBlockStyle}" />  
            </Grid>-->  
        </SplitView>  
  
    </Grid>  
</Window>  

MainWindow():

        // Retrieve the window handle (HWND) of the current WinUI 3 window.  
        auto windowNative{ this->try_as<::IWindowNative>() };  
        winrt::check_bool(windowNative);     
        HWND hWnd{ 0 };  
        windowNative->get_WindowHandle(&hWnd);         
        s_handle = hWnd;  
  
        // Make it not resizable.    
        Microsoft::UI::WindowId windowId = Microsoft::UI::GetWindowIdFromWindow(hWnd); // Retrieve the WindowId that corresponds to hWnd.  
        Microsoft::UI::Windowing::AppWindow appWindow = Microsoft::UI::Windowing::AppWindow::GetFromWindowId(windowId); // Retrieve the AppWindow for the current (XAML) WinUI 3 window.        
        Microsoft::UI::Windowing::OverlappedPresenter presenter = appWindow.Presenter().as<Microsoft::UI::Windowing::OverlappedPresenter>();  
        presenter.IsResizable(false);  
  
        // Set window size  
        winrt::Windows::Graphics::SizeInt32 size{};  
        size.Height = 800;  
        size.Width = 1190;  
        appWindow.Resize(size);  

Added 05/24/2022 - 6.20 am

Answer 1

Ok,
I'm a donk. I don't want to say something wrong but it works by SetWindowPos.
I positioned it wrong in the message loop. :(
Thanks you!