Close popup from child button's press? - wpf

Question

I have a Popup that contains a "close" button. The popup is opened by a toggle button (its IsOpen property is bound to a ToggleButton as provided by this answer). How can I close the popup when the button is pressed? This is my XAML:
<Canvas x:Name="LayoutRoot">
<ToggleButton x:Name="ToggleButton"
Style="{DynamicResource ToggleButtonStyle}" Height="51" Canvas.Left="2.999" Width="50.333" IsHitTestVisible="{Binding ElementName=Popup, Path=IsOpen, Mode=OneWay, Converter={StaticResource BoolInverter}}"/>
<Popup x:Name="Popup" IsOpen="{Binding IsChecked, ElementName=ToggleButton}" StaysOpen="False" AllowsTransparency="True">
<Canvas Height="550" Width="550">
<Grid Height="500" Width="500" Canvas.Left="25" Canvas.Top="25" d:LayoutOverrides="Width, Height, Margin">
<Grid.Effect>
<DropShadowEffect BlurRadius="15" ShadowDepth="0"/>
</Grid.Effect>
<Grid.RowDefinitions>
<RowDefinition Height="0.132*"/>
<RowDefinition Height="0.868*"/>
</Grid.RowDefinitions>
<Rectangle x:Name="Background" Fill="#FFF4F4F5" Margin="0" Stroke="Black" RadiusX="6" RadiusY="6" Grid.RowSpan="2"/>
<Border x:Name="TitleBar" BorderThickness="1" Height="70" VerticalAlignment="Top" Margin="0,0.5,0,0" CornerRadius="5">
<DockPanel>
<TextBlock TextWrapping="Wrap" Text="FOOBAR POPUP TITLE" FontSize="24" FontFamily="Arial Narrow" Margin="17,0,0,0" d:LayoutOverrides="Height" VerticalAlignment="Center" FontWeight="Bold"/>
<Button x:Name="CloseButton" Content="Button" VerticalAlignment="Center" DockPanel.Dock="Right" HorizontalAlignment="Right" Margin="0,0,13,0" Style="{DynamicResource CloseButtonStyle}"/>
</DockPanel>
</Border>
<Border BorderThickness="1" Height="413" Grid.Row="1" Background="#FF2F2F2F" Margin="12">
<Rectangle Fill="#FFF4F4F5" RadiusY="6" RadiusX="6" Stroke="Black" Margin="12"/>
</Border>
</Grid>
</Canvas>
</Popup>
</Canvas>

Answer 1

A better approach than code behind is to use an event trigger on the button click event:
<Button>
<Button.Triggers>
<EventTrigger RoutedEvent="Button.Click">
<BeginStoryboard>
<Storyboard>
<BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="IsChecked" Storyboard.TargetName="ToggleButton">
<DiscreteBooleanKeyFrame KeyTime="0:0:0" Value="False" />
</BooleanAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Button.Triggers>
</Button>
Disclaimer: I haven't run this code through VS so it might have a typo or 2

Answer 2

Other answers didn't work for me, because I was using a DataTemplate for the buttons inside the popup. After lot's of searching I found that I should use Storyboard.Target instead of Storyboard.TargetName. Otherwise the x:Name was not found and there was some namespace exception.
<ToggleButton x:Name="MyToggleButtonName" Content="{Binding MyToggleButtonString}"/>
And later inside the Popup that has a ListBox which is populated from some ItemsSource:
<ListBox.ItemTemplate>
<DataTemplate>
<Button Content="{Binding Name, Mode=OneWay}"
Command="{StaticResource MyCommandThatTakesAParameter}"
CommandParameter="{Binding Name}">
<Button.Triggers>
<EventTrigger RoutedEvent="Button.Click">
<BeginStoryboard>
<Storyboard>
<BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="IsChecked" Storyboard.Target="{Binding ElementName=MyToggleButtonName}">
</BooleanAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Button.Triggers>
</Button>
</DataTemplate>
</ListBox.ItemTemplate>
This way it is possible to get a somewhat working ComboBox which can execute commands with the buttons inside it. (A normal ComboBox can't launch commands for some odd reason.)

Answer 3

One way of doing it is to add event handler for your CloseButton:
<Button x:Name="CloseButton" Click="OnButtonClick" Content="Button" VerticalAlignment="Center" DockPanel.Dock="Right" HorizontalAlignment="Right" Margin="0,0,13,0" Style="{DynamicResource CloseButtonStyle}"/>
And in OnButtonClick event handler set state of your
TuggleButton.IsChecked = false;
I have't tested code in VS, so there might be some typos