Creating WPF examples in LinqPad

Question

Is there any way to sanely instantiate WPF objects in LinqPad? Here's my example (the correct assemblies are added in the query, etc):

var w = new Window();
w.Loaded += (o,e) => {
    w.Content = new TextBlock() { Text = "Foo" };
};

w.Show();

However, this dies a horrible death:

System.Runtime.InteropServices.InvalidComObjectException: COM object that has been separated from its underlying RCW cannot be used.

   at System.Windows.Input.TextServicesContext.StopTransitoryExtension()
   at System.Windows.Input.TextServicesContext.Uninitialize(Boolean appDomainShutdown)
   at System.Windows.Input.TextServicesContext.TextServicesContextShutDownListener.OnShutDown(Object target, Object sender, EventArgs e)
   at MS.Internal.ShutDownListener.HandleShutDown(Object sender, EventArgs e)

Any clues on how I can get this to work?

Update: this is fixed in the recent LINQPad betas - you can show WPF windows any way you want and there are no horrible deaths :) You can also do the following, which displays a WPF element in the output panel: PanelManager.DisplayWpfElement (new TextBlock() { Text = "Foo" }); — Joe Albahari, Mar 09 '12 at 13:01

Joe Albahari · Answer 1 · 2011-03-19T05:15:29.997

12

Another way to do it is as follows:

w.ShowDialog();
Dispatcher.CurrentDispatcher.InvokeShutdown();  // Cleanly end WPF session.

More examples:

new Window { Content = "Foo" }.ShowDialog();
new Window { Content = new Button { FontSize = 50, Content = "Foo" } }.ShowDialog();

Dispatcher.CurrentDispatcher.InvokeShutdown();  // Cleanly end WPF session.

edited Mar 19 '11 at 05:15

answered Mar 19 '11 at 01:56

Joe Albahari

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score 8 · Accepted Answer · answered Mar 18 '11 at 20:44

8

You need to run a message loop by calling new Application().Run(w).

answered Mar 18 '11 at 20:44

SLaks

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Creating WPF examples in LinqPad

2 Answers2