WPF Frame - Size to content - wpf

Question

I've been having difficulty getting the WPF Frame control to resize to it's contents height (HTML).
(edit) the HTML content is 500px, I was expecting the first row to take this height, but the Frame is being clipped to 150px.
I've tried quite a few alterations on this theme:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Frame Grid.ColumnSpan="2"
VerticalAlignment="Bottom"
HorizontalContentAlignment="Stretch" VerticalContentAlignment="Top"
NavigationUIVisibility="Hidden"
Source="..\My Web Sites\test.html" />
<Button Grid.Row="1"
Width="160" Height="50"
HorizontalAlignment="Center" VerticalAlignment="Center"
Content="Book Todays Events" />
<DockPanel Grid.Row="1" Grid.Column="1"
HorizontalAlignment="Center">
<Button Width="160" Height="50"
DockPanel.Dock="Bottom"
HorizontalAlignment="Right"
Content="Select Date" />
<Border Width="350"
HorizontalAlignment="Center"
Background="Gray">
<TextBlock Text="Calendar" />
</Border>
</DockPanel>
</Grid>
I've tried swapping out the Frame for a ContentControl with 500px of content which worked fine, so I'm not sure what the problem is...
The HTML is a static height, and won't change at runtime, however the client will be able to alter it so I don't wan't to define a static height or hack into the HTML to find a height.

Answer 1

How do you expect the height to adjust when the size is auto? Auto means it will adjust to the size of the content. If the HTML is a static height then the row will be that static height. Is that the behavior you are getting? If you want each row to get half the screen height then use *.