WPF switch between regions with toggle button - wpf

Question

I have a view, that when loaded contains a toolbar at the top, and two regions underneath.
I am currently using a grid, so:
row 0 contains the toolbar
row 1 contains region1 and
row 2 contains region2.
The toolbar has a toggle button, which when clicked, completely hides region1, and shows region 2, and visa-versa.
What is the best way to achieve this?
I have tried binding the 2 rows heights to get altered on the toggle, but the space is not filled correctly. VerticalAlignment="Stretch" and HorizontalAlignment="Stretch" are both used.
I have also tried enabling and disabling the itemcontrol hosting the region, but that doesn't seem to work at all.
Any pointers as to what I have done are much appreciated! :)

Answer 1

Not sure if I fully understand what you want. Something like this?
<DockPanel>
<ToggleButton Name="viewToggle" DockPanel.Dock="Top">Toggle Region</ToggleButton>
<Grid>
<ContentControl>
<TextBlock>I'm region 1</TextBlock>
<ContentControl.Style>
<Style>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=viewToggle, Path=IsChecked}" Value="False">
<Setter Property="ContentControl.Visibility" Value="Visible"></Setter>
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=viewToggle, Path=IsChecked}" Value="True">
<Setter Property="ContentControl.Visibility" Value="Hidden"></Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</ContentControl.Style>
</ContentControl>
<ContentControl>
<TextBlock>I'm region 2</TextBlock>
<ContentControl.Style>
<Style>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=viewToggle, Path=IsChecked}" Value="True">
<Setter Property="ContentControl.Visibility" Value="Visible"></Setter>
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=viewToggle, Path=IsChecked}" Value="False">
<Setter Property="ContentControl.Visibility" Value="Hidden"></Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</ContentControl.Style>
</ContentControl>
</Grid>
</DockPanel>

Answer 2

I used for this one row that contains region1 and region2 too. region2's Visibility set to Collapsed by default, and when an event occured (a checkbox for me, databound to a bool value) i flipped the Visibility of the regions. My 'regions' contained two different layout, and i don't experienced any issue.
A quick sample code without code-behind:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition />
</Grid.RowDefinitions>
<Grid.Resources>
<Style x:Key="showOnToggled" TargetType="GroupBox" BasedOn="{StaticResource {x:Type GroupBox}}" >
<Setter Property="Visibility" Value="Visible" />
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=toggleButton, Path=IsChecked}" Value="True" >
<Setter Property="Visibility" Value="Collapsed" />
</DataTrigger>
</Style.Triggers>
</Style>
<Style x:Key="hideOnToggled" TargetType="GroupBox" BasedOn="{StaticResource {x:Type GroupBox}}" >
<Setter Property="Visibility" Value="Collapsed" />
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=toggleButton, Path=IsChecked}" Value="True" >
<Setter Property="Visibility" Value="Visible" />
</DataTrigger>
</Style.Triggers>
</Style>
</Grid.Resources>
<ToggleButton Content="Switch Region"
Grid.Row="0"
x:Name="toggleButton" />
<GroupBox Header="Region1"
Grid.Row="1"
Style="{StaticResource showOnToggled}" >
<!-- Region1's content -->
</GroupBox>
<GroupBox Header="Region2"
Grid.Row="1"
Style="{StaticResource hideOnToggled}" >
<!-- Region2's content -->
</GroupBox>
</Grid>