Where to set window property in XAML - wpf

Question

I found some code for an attached property that will let me escape close a window called as a dialog here on SO.
But I can't figure out where to set the property.
This might be complicated by the fact that this is a RibbonWindow and not a normal Window but I don't think so.
The attached property will be ab:WindowService.EscapeClosesWindow="True". Where in the xaml should it go??
Cheers,
Berryl
ERROR
Unable to cast object of type
'Microsoft.Expression.Platform.WPF.InstanceBuilders.WindowInstance' to type
'Microsoft.Windows.Controls.Ribbon.RibbonWindow'.
at AttachedBehaviors.WindowService.OnEscapeClosesWindowChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
The gist of the attached property is
private static void OnEscapeClosesWindowChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) {
var target = (Window) d;
if (target != null)
target.PreviewKeyDown += Window_PreviewKeyDown;
}
/// <summary>Handle the PreviewKeyDown event on the window</summary>
private static void Window_PreviewKeyDown(object sender, KeyEventArgs e) {
var target = (Window) sender;
// If this is the escape key, close the window
if (e.Key == Key.Escape)
target.Close();
}
window xaml
<r:RibbonWindow x:Class="SCA.Presentation.Wpf.Views.TimeSheet.WeeklyTimeSheetView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local ="clr-namespace:SCA.Presentation.Wpf.Views.TimeSheet"
xmlns:ab="clr-namespace:SCA.Presentation.Wpf.AttachedBehaviors;assembly=Smack.Core.Presentation.Wpf"
xmlns:r="clr-namespace:Microsoft.Windows.Controls.Ribbon;assembly=RibbonControlsLibrary"
Background="{DynamicResource WaveWindowBackground}"
FontFamily="Arial" FontSize="12"
Width="900" Height="600"
ResizeMode="CanResizeWithGrip"
WindowStartupLocation="CenterScreen"
ab:WindowService.EscapeClosesWindow="True" <=== ERROR
>
<r:RibbonWindow.Resources>
<ResourceDictionary Source="TimesheetResources.xaml" />
</r:RibbonWindow.Resources>

Answer 1

I created a sample application to recreate that error you mentioned. And I failed to reproduce that error. It easily compiled in my app.
Can you check with a sample application and try to find any differences?
Recreation:
public static class WindowService
{
public static readonly DependencyProperty EscapeClosesWindowProperty = DependencyProperty.RegisterAttached(
"EscapeClosesWindow",
typeof(bool),
typeof(WindowService),
new FrameworkPropertyMetadata(false, new PropertyChangedCallback(OnEscapeClosesWindowChanged)));
public static bool GetEscapeClosesWindow(DependencyObject d)
{
return (bool)d.GetValue(EscapeClosesWindowProperty);
}
public static void SetEscapeClosesWindow(DependencyObject d, bool value)
{
d.SetValue(EscapeClosesWindowProperty, value);
}
private static void OnEscapeClosesWindowChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
Window target = (Window)d;
if (target != null)
{
target.PreviewKeyDown += new System.Windows.Input.KeyEventHandler(Window_PreviewKeyDown);
}
}
private static void Window_PreviewKeyDown(object sender, KeyEventArgs e)
{
Window target = (Window)sender;
if (e.Key == Key.Escape)
target.Close();
}
}
XAML:
<ribbon:RibbonWindow x:Class="WpfApplication1.RibbonWindow1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:ribbon="clr-namespace:Microsoft.Windows.Controls.Ribbon;assembly=RibbonControlsLibrary"
xmlns:local="clr-namespace:WpfApplication1"
local:WindowService.EscapeClosesWindow="True"
Title="RibbonWindow1"
x:Name="Window"
Width="640"
Height="480">
<Grid x:Name="LayoutRoot">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<ribbon:Ribbon x:Name="Ribbon">
<ribbon:RibbonTab x:Name="HomeTab"
Header="Home">
<ribbon:RibbonGroup x:Name="Group1"
Header="Group1"></ribbon:RibbonGroup>
</ribbon:RibbonTab>
</ribbon:Ribbon>
</Grid>
</ribbon:RibbonWindow>