2 different stackpanels in a BottomAppBar Universal App - xaml

Question

I am trying to put the elements in my BottomAppBar like that:
with this code I get the two stackpanels in the left,can you correct please my code:
<Page.BottomAppBar>
<CommandBar Background="#eff0f2">
<CommandBar.Content>
<Grid HorizontalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<StackPanel Orientation="Horizontal"
HorizontalAlignment="Left" Grid.Row="0" Grid.Column="0" VerticalAlignment="Stretch">
<Image Source="images/1.png" Height="35" Width="35" />
<ComboBox Margin="2" BorderThickness="0" SelectedItem="Français">
<ComboBoxItem Content="Français" />
<ComboBoxItem Content="Anglais" />
</ComboBox>
<Button VerticalAlignment="Stretch" Background="#eff0f2" >
<Button.Content>
<TextBlock Text="Conditions des données" Foreground="#336699"></TextBlock>
</Button.Content>
</Button>
<Button VerticalAlignment="Stretch" Background="#eff0f2" Margin="0">
<TextBlock Text="-Mentions légales" Foreground="#336699"></TextBlock>
</Button>
<Button VerticalAlignment="Stretch" Background="#eff0f2" Margin="0">
<TextBlock Text="-Impressum" Foreground="#336699"></TextBlock>
</Button>
</StackPanel>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Grid.Row="0" Grid.Column="1" >
<Image Source="images/marque.png" Height="35" Width="35" />
<TextBlock Text="2015 OAASE Corporation|All Right Reserved." Foreground="#666666" Margin="10" />
</StackPanel>
</Grid>
</CommandBar.Content>
</CommandBar>
</Page.BottomAppBar>
thanks for help :)

Answer 1

You just have to add Stretch HorizontalContentAlignment to CommandBar :
<CommandBar HorizontalContentAlignment="Stretch">
EDIT:
#user3821206, a quick fix for your problem of responsiveness is to set a minimum width to the first column, and set the width of the second column to Auto. When the screen is too small, the right part is cropped :
<Grid.ColumnDefinitions>
<ColumnDefinition MinWidth="550" Width="*" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
A better and complementary fix is to use VisualStateManager and AdaptiveTrigger. For example, you can hide the right panel if the screen size is less than 720. To do that, give a name to your right Stackpanel :
<StackPanel x:Name="RightPanel"
And add the following snippet in the first container of your page (for me, it's a Grid) :
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<!-- Start of snippet -->
<VisualStateManager.VisualStateGroups>
<VisualStateGroup>
<VisualState>
<!-- Edit style for small screen -->
<VisualState.StateTriggers>
<AdaptiveTrigger MinWindowWidth="0" />
</VisualState.StateTriggers>
<VisualState.Setters>
<Setter Target="RightPanel.Visibility"
Value="Collapsed" />
</VisualState.Setters>
</VisualState>
<VisualState>
<!-- Disable previous changes for large screen -->
<VisualState.StateTriggers>
<AdaptiveTrigger MinWindowWidth="720" />
</VisualState.StateTriggers>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<!-- End of snippet -->
</Grid>