listbox not showing all items windows phone 8.1 - listbox

Question

I'm trying to populate a listbox using binding in windows phone 8.1. I can't see all of the items in the control.
XAML:
<Grid x:Name="LayoutRoot">
<Grid.ChildrenTransitions>
<TransitionCollection>
<EntranceThemeTransition/>
</TransitionCollection>
</Grid.ChildrenTransitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<!-- Title Panel -->
<StackPanel Grid.Row="0" Margin="19,0,0,0">
<TextBlock Text="Application Name" Style="{ThemeResource HeaderTextBlockStyle}" CharacterSpacing="{ThemeResource PivotHeaderItemCharacterSpacing}"/>
</StackPanel>
<StackPanel Grid.Row="1" x:Name="ContentRoot" Margin="19,0,19,0">
<ComboBox
x:Name="ComboBox1"
ItemsSource="{Binding}"
HorizontalAlignment="Stretch"
VerticalAlignment="Top"
SelectionChanged="ComboBox1_SelectionChanged"
/>
<ListBox x:Name="ListBox1" ItemsSource="{Binding}" Height="1000">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Vertical" Margin="0">
<TextBlock Text="{Binding GameName}" Margin="2"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
</Grid>
I populate the listbox in code:
private ObservableCollection<Game> _Games = new ObservableCollection<Game>();
public StartPage()
{
this.InitializeComponent();
this.navigationHelper = new NavigationHelper(this);
this.navigationHelper.LoadState += this.NavigationHelper_LoadState;
this.navigationHelper.SaveState += this.NavigationHelper_SaveState;
ListBox1.DataContext = _Games;
}
....
private async void ComboBox1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var group = _Groups[ComboBox1.SelectedIndex];
games = await DataServer.GetGamesAsync(group.GroupName);
_Games.Clear();
foreach (var game in games.OrderBy(g => g.GameName))
{
_Games.Add(game);
}
}
There are 69 games but I can only see about 28 in the list view in the emulator when I scroll the list. It's clear that there are more items in the list, but I can't scroll to them. Any help is appreciated.

Answer 1

Replace the StackPanel with a Grid and add a couple more RowDefinitions in the second Grid you'll add. StackPanels don't size themselves dynamically, so instead of sizing to the screen, it's just stretched infinitely to the bottom.