Windows Phone 7 - ListBox and Stackpanel sizes - windows-phone-7

Question

I Have a little problem with a ListBox and its elements. As you can see in my code, the stackpanel for both textblocks is set to 250. This is set like this because otherwise the text expands in 1 line and you cannot see the button. As obvious the problem is that setting this parameter as static, if the resolution or the orientation changes wont fit the screen completely. I would like to know if there is a way to set this width dynamically.
<ListBox x:Name="attractionsListbox" Margin="0,0,-12,0" ItemsSource="{Binding Attractions}" Loaded="attractionsListbox_Loaded">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" Tag="{Binding Name}" Tap="AttractionListBoxItem_Tap">
<Image Height="140" Width="140" Margin="0,5,0,0" Source="{Binding Thumbnail}" MaxWidth="140" MaxHeight="140" Stretch="Fill" />
<StackPanel Width="250">
<TextBlock x:Name="AttractionName" Text="{Binding Name}" TextWrapping="Wrap" Style="{StaticResource PhoneTextSmallStyle}" FontSize="20" Foreground="Black" FontWeight="Bold" />
<TextBlock Text="{Binding ShortDescription}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextSmallStyle }" Foreground="Black" />
</StackPanel>
<Button Width="80" Height="80" Padding="10,3,10,5" BorderBrush="Black" Click="Add_Todo_Click" Tag="{Binding Name}">
<Button.Background>
<ImageBrush ImageSource="/SundsvallWP7;component/Images/appbar.add.rest.png"/>
</Button.Background>
</Button>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
(In android there is weights, where you can assign the weight of each control, don't know if this exists in Windows Phone).
Thank you very much.

Answer 1

A DockPanel may work better for your scenario than a StackPanel. Put the button on the right and the image on the left, then your middle StackPanel content will flow to fill.
http://www.windowsphonegeek.com/articles/Using-DockPanel-in-WP7.
Alternatively, there are only the two orientations and resolution shouldn't be changing. You could just bind the Width to the Orientation with a value converter.