Add close window clause to WPF dialog - wpf

Question

I have a bit of experience with PowerShell but not with WPF. The following code runs fine in PowerShell and launches a jpg file in a window:
Param (
[String]$FilePath = "C:\SplashScreen.jpg"
)
Add-Type -AssemblyName PresentationFramework
[XML]$xaml = #"
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Name="Window" Title="Initial Window"
WindowStartupLocation = "CenterScreen"
WindowStyle = "None"
ResizeMode = "NoResize"
SizeToContent = "WidthAndHeight">
<Image Source="$FilePath" />
<!-- Button to close on Esc -->
</Window>
"#
$reader = (New-Object System.Xml.XmlNodeReader $xaml)
$window = [Windows.Markup.XamlReader]::Load($reader)
$window.Activate()
$window.ShowDialog()
The only thing I need to add is the closing of the dialog when the escape key is pressed. The following code does just that:
<Window.CommandBindings>
<CommandBinding Command="Close" Executed="OnCloseCmdExecuted" />
</Window.CommandBindings>
<Window.InputBindings>
<KeyBinding Command="Close" Key="Escape" />
</Window.InputBindings>
private void OnCloseCmdExecuted(object sender, ExecutedRoutedEventArgs e)
{
this.Close();
}
Or this one:
public MainWindow()
{
InitializeComponent();
this.PreviewKeyDown += new KeyEventHandler(HandleEsc);
}
private void HandleEsc(object sender, KeyEventArgs e)
{
if (e.Key == Key.Escape)
Close();
}
Wherever I put the code in the XML it never seems to work and throws error. How can this be added?

Answer 1

That was a fun challange :-)
Try this:
Param (
[String]$FilePath = "C:\temp\Export\mypic.png"
)
Add-Type -AssemblyName PresentationFramework
[XML]$xaml = #"
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Name="Window" Title="Initial Window"
WindowStartupLocation = "CenterScreen"
WindowStyle = "None"
ResizeMode = "NoResize"
SizeToContent = "WidthAndHeight">
<Image Source="$FilePath" />
<!-- Button to close on Esc -->
</Window>
"#
$reader = (New-Object System.Xml.XmlNodeReader $xaml)
$window = [Windows.Markup.XamlReader]::Load($reader)
$code = {
[System.Windows.Input.KeyEventArgs]$e = $args[1]
if ($e.Key -eq 'ESC')
{
$window.Close()
}
}
$null = $window.add_KeyUp($code)
$window.Activate()
$window.ShowDialog()
I found the idea here
https://www.reddit.com/r/sysadmin/comments/1u3c98/powershell_winform_on_close_event_handler_example/
and
https://books.google.ch/books?id=Noh4DwAAQBAJ&pg=PT1183&lpg=PT1183&dq=powershell+add_keyup&source=bl&ots=2Q42772co0&sig=ACfU3U2diUwUvvmbWoou003XNaOBLjLzQQ&hl=de&sa=X&ved=2ahUKEwiTqOLx3KXlAhUECewKHfR3AT0Q6AEwAnoECAkQAQ#v=onepage&q=powershell%20add_keyup&f=false