<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
<Grid.RowDefinitions>
<StackPanel>
<TextBlock />
<TextBlock />
</StackPanel>
<UI:AdControl Grid.Row="1"/>
</Grid>
Docking Windows Phone controls to the bottom of a StackPanel
原文：http://www.cnblogs.com/MinieGoGo/p/3963675.html