It would be a way to change the screen settings:
Automatic media:
<ScrollViewer x:Name="ContentGrid" Grid.Row="1" VerticalScrollBarVisibility="Auto">
<!--You must apply a background to the StackPanel control or you
will be unable to pan the contents.-->
<StackPanel Background="Transparent" >
<!--Adding various controls and UI elements.-->
<Button Content="This is a Button" />
<Rectangle Width="100" Height="100" Margin="12,0"
HorizontalAlignment="Left" Fill="{StaticResource PhoneAccentBrush}"/>
<Rectangle Width="100" Height="100" HorizontalAlignment="Center"
Fill="{StaticResource PhoneAccentBrush}"/>
<Rectangle Width="100" Height="100" Margin="12,0"
HorizontalAlignment="Right" Fill="{StaticResource PhoneAccentBrush}"/>
<TextBlock Text="This is a line of text that will wrap in portrait
orientation but not landscape orientation." TextWrapping="Wrap" />
<CheckBox Content="A CheckBox"/>
<RadioButton Content="A RadioButton" />
</StackPanel>
</ScrollViewer>
Website reference (all rights copyright to the msdn.microsoft.com site).
Or
Rewrite this method
protected override void OnOrientationChanged(OrientationChangedEventArgs e)
{
if (e.Orientation == PageOrientation.Landscape)
{
}
else if (e.Orientation == PageOrientation.Portrait)
{
}
base.OnOrientationChanged(e);
}
Or the method itself
private void PhoneApplicationPage_OrientationChanged(object sender, OrientationChangedEventArgs e)
{
if (e.Orientation == PageOrientation.Landscape)
{
}
else if (e.Orientation == PageOrientation.Portrait)
{
}
}
In this link has the explanation detailed.
Example
This example worked for Portrait and Landscape as you expect.
<phone:PhoneApplicationPage
x:Class="PhoneApp1.Page3"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="PortraitOrLandscape" Orientation="Landscape"
mc:Ignorable="d"
shell:SystemTray.IsVisible="True">
<!--LayoutRoot is the root grid where all page content is placed-->
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<!--TitlePanel contains the name of the application and page title-->
<StackPanel Grid.Row="0" Margin="12,17,0,28">
<TextBlock Text="MY APPLICATION" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock Text="page name" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>
<!--ContentPanel - place additional content here-->
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<ScrollViewer x:Name="ContentGrid" Grid.Row="1" VerticalScrollBarVisibility="Auto">
<!--You must apply a background to the StackPanel control or you
will be unable to pan the contents.-->
<StackPanel Background="Transparent" >
<!--Adding various controls and UI elements.-->
<Button Content="This is a Button" />
<Rectangle Width="100" Height="100" Margin="12,0"
HorizontalAlignment="Left" Fill="{StaticResource PhoneAccentBrush}"/>
<Rectangle Width="100" Height="100" HorizontalAlignment="Center"
Fill="{StaticResource PhoneAccentBrush}"/>
<Rectangle Width="100" Height="100" Margin="12,0"
HorizontalAlignment="Right" Fill="{StaticResource PhoneAccentBrush}"/>
<TextBlock Text="This is a line of text that will wrap in portrait
orientation but not landscape orientation." TextWrapping="Wrap" />
<CheckBox Content="A CheckBox"/>
<RadioButton Content="A RadioButton" />
</StackPanel>
</ScrollViewer>
</Grid>
</Grid>
</phone:PhoneApplicationPage>
For your solution, eg
<phone:PhoneApplicationPage
x:Class="PhoneApp1.Page4"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="PortraitOrLandscape" Orientation="Portrait"
mc:Ignorable="d"
shell:SystemTray.IsVisible="True" Loaded="PhoneApplicationPage_Loaded" OrientationChanged="PhoneApplicationPage_OrientationChanged">
<!--Solução-->
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<StackPanel Grid.Row="0" Margin="12,17,0,28">
<TextBlock Text="MY APPLICATION" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock Text="page name" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="15,0,0,0" VerticalAlignment="Top" HorizontalAlignment="Stretch">
<ScrollViewer x:Name="ContentGrid" Grid.Row="1" VerticalScrollBarVisibility="Auto" Margin="2,2,10,0">
<phone:LongListSelector Name="lstConsPais" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" LayoutMode="List" IsGroupingEnabled="False" SelectionChanged="lstConsPais_SelectionChanged">
<phone:LongListSelector.ItemTemplate>
<DataTemplate>
<Border BorderBrush="#111" Margin="0, 10, 0, 0" BorderThickness="0,0,0,2" Width="Auto" VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
<StackPanel VerticalAlignment="Center" Orientation="Horizontal" Width="Auto">
<Image Height="100" Width="100" Source="{Binding NomeImgBandeira}" VerticalAlignment="Top" HorizontalAlignment="Left" Margin="5,0,0,0"/>
<StackPanel Orientation="Vertical" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<TextBlock Text="{Binding NomePais}" Style="{StaticResource PhoneTextGroupHeaderStyle}" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="15,25,0,0" />
</StackPanel>
</StackPanel>
</Border>
</DataTemplate>
</phone:LongListSelector.ItemTemplate>
</phone:LongListSelector>
</ScrollViewer>
</Grid>
</Grid>
<!--Solução-->
</phone:PhoneApplicationPage>
References:
