How to bind Close command to a button

Question

The easiest way is to implement ButtonClick event handler and invoke Window.Close() method, but how doing this through a Command binding?

Answer 1

All it takes is a bit of XAML...

<Window x:Class="WCSamples.Window1"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">     <Window.CommandBindings>         <CommandBinding Command="ApplicationCommands.Close"                         Executed="CloseCommandHandler"/>     </Window.CommandBindings>     <StackPanel Name="MainStackPanel">         <Button Command="ApplicationCommands.Close"                  Content="Close Window" />     </StackPanel> </Window> 

And a bit of C#...

private void CloseCommandHandler(object sender, ExecutedRoutedEventArgs e) {     this.Close(); } 

(adapted from this MSDN article)

Answer 2

Actually, it is possible without C# code. The key is to use interactions:

<Button Content="Close">   <i:Interaction.Triggers>     <i:EventTrigger EventName="Click">       <ei:CallMethodAction TargetObject="{Binding ElementName=window}" MethodName="Close"/>     </i:EventTrigger>   </i:Interaction.Triggers> </Button> 

In order for this to work, just set the x:Name of your window to "window", and add these two namespaces:

xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"  xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions" 

This requires that you add the Expression Blend SDK DLL to your project, specifically Microsoft.Expression.Interactions.

In case you don't have Blend, the SDK can be downloaded here.