XAML StackPanel within DockPanel is not Docking Right

Question

The XAML StackPanel Name="statusSP" is not DockPanel.Dock="Right"nor HorizontalAlignment="Right". Why? How to get statusSP to align to the Top Right corner of the Window?

<Window x:Class="Cinetique_GUI.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:Cinetique_GUI"
        mc:Ignorable="d"
        Title="Cinetique  GUI" Height="1080" Width="1920" WindowState="Maximized" >
    <Window.Resources>
        <x:Array x:Key="modes" Type="{x:Type local:Mode}">
            <local:Mode Name="Manual"/>
            <local:Mode Name="Teach"/>
            <local:Mode Name="Playback"/>
            <local:Mode Name="Setup"/>
        </x:Array>
    </Window.Resources>
    <DockPanel LastChildFill="False">
        <StackPanel DockPanel.Dock="Top">
            <StackPanel Orientation="Horizontal">
                <Image Source="Images/Logo-White-Crop.png" Stretch="Fill" Margin="5" Width="300" Height="100" HorizontalAlignment="Left"  />
                
                    <Label Content="System Status:" Margin="10,10,10,10" FontSize="30" FontWeight="Bold"/>
                    <Label Name="statusLBL" Content="Ready" Margin="10,10,10,10" FontSize="30" FontWeight="Bold" Foreground="Red"/>
                </StackPanel>
            </StackPanel>
            <StackPanel Orientation="Horizontal">
                <Label Content="Mode:" Margin="10,10,10,10" FontSize="30" FontWeight="Bold"/>
                <ListBox x:Name="selLST" SelectionChanged="PrintText" 
                    SelectionMode="Single" MaxHeight="42"
                    ItemsSource="{Binding}" DataContext="{StaticResource modes}"

                    DisplayMemberPath="Name"
                    ScrollViewer.VerticalScrollBarVisibility="Hidden" 
                         FontSize="28" FontWeight="Bold" Foreground="Red"/>
            </StackPanel>
        </StackPanel>
        <StackPanel DockPanel.Dock="Bottom" Orientation="Horizontal" HorizontalAlignment="Center" Margin="20,20,20,20">
            <Button Content="Stop" Margin="20,10,40,10" FontSize="36" FontWeight="Bold" Width="120"/>
            <Button Content="Quit" Margin="40,10,20,10" FontSize="36" FontWeight="Bold" Width="120"/>
        </StackPanel>
    </DockPanel>
</Window>

Answer 1

Which StackPanel is your StackPanel Name="statusSP" ?

If it is the outermost layer of the StackPanel you could refer to the following code. It works fine when HorizontalAlignment="Right" is set.

 <DockPanel LastChildFill="False">
        <StackPanel DockPanel.Dock="Top"   Name="statusSP"  HorizontalAlignment="Right"  >

            <Image Source="Images\tu.jfif" Stretch="Fill" Margin="5" Width="300" Height="100" HorizontalAlignment="Left"  />
            <StackPanel Orientation="Horizontal">
                <Label Content="System Status:" Margin="10,10,10,10" FontSize="30" FontWeight="Bold"/>
                <Label Name="statusLBL" Content="Ready" Margin="10,10,10,10" FontSize="30" FontWeight="Bold" Foreground="Red"/>
            </StackPanel>
            <StackPanel Orientation="Horizontal">
                <Label Content="Mode:" Margin="10,10,10,10" FontSize="30" FontWeight="Bold"/>
                <ListBox SelectionMode="Single" MaxHeight="30"  ItemsSource="{Binding}" DataContext="{StaticResource modes}"
                    ScrollViewer.VerticalScrollBarVisibility="Visible">
                </ListBox>
            </StackPanel>
        </StackPanel>
        <StackPanel DockPanel.Dock="Bottom" Orientation="Horizontal" HorizontalAlignment="Center" Margin="20,20,20,20">
            <Button Content="Stop" Margin="20,10,40,10" FontSize="36" FontWeight="Bold" Width="120"/>
            <Button Content="Quit" Margin="40,10,20,10" FontSize="36" FontWeight="Bold" Width="120"/>

        </StackPanel>
    </DockPanel>

The result:

If you still have questions, you can describe which control you want to set.

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