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copied!<p>Just for reference, the <i>CommandReference</i> class is currently not included in an assembly that you can reference, but is included with the M-V-VM project template. So if you don't build your application from the template, then you have to get the class from somewhere else. I chose to copy it from the sample project. I included it below to allow everyone easy access to this little chunk of goodness, but be sure to check for updates to the template in future versions of the M-V-VM Toolkit. </p> <pre><code>/// <summary> /// This class facilitates associating a key binding in XAML markup to a command /// defined in a View Model by exposing a Command dependency property. /// The class derives from Freezable to work around a limitation in WPF when data-binding from XAML. /// </summary> public class CommandReference : Freezable, ICommand { public CommandReference( ) { } public static readonly DependencyProperty CommandProperty = DependencyProperty.Register( "Command", typeof( ICommand ), typeof( CommandReference ), new PropertyMetadata( new PropertyChangedCallback( OnCommandChanged ) ) ); public ICommand Command { get { return (ICommand)GetValue( CommandProperty ); } set { SetValue( CommandProperty, value ); } } #region ICommand Members public bool CanExecute(object parameter) { if (Command != null) return Command.CanExecute( parameter ); return false; } public void Execute(object parameter) { Command.Execute( parameter ); } public event EventHandler CanExecuteChanged; private static void OnCommandChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { CommandReference commandReference = d as CommandReference; if (commandReference != null) { ICommand oldCommand = e.OldValue as ICommand; if (oldCommand != null) oldCommand.CanExecuteChanged -= commandReference.CanExecuteChanged; ICommand newCommand = e.NewValue as ICommand; if (newCommand != null) newCommand.CanExecuteChanged += commandReference.CanExecuteChanged; } } #endregion #region Freezable protected override Freezable CreateInstanceCore( ) { return new CommandReference(); } #endregion } </code></pre> <p>Enjoy!</p>

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