Invalid cross-thread access exception

[Wim]

Hi,

When my application is throwing an exception, the messagebox doesn't show. Instead I get this :

Invalid cross-thread access.

at MS.Internal.XcpImports.CheckThread()
   at System.Windows.Application.remove_UnhandledException(EventHandler`1 value)
   at Telerik.Windows.Controls.RadDiagnostics.f(Object A_0, ApplicationUnhandledExceptionEventArgs A_1)
   at MS.Internal.Error.CallApplicationUEHandler(Exception e)
   at MS.Internal.JoltHelper.OnUnhandledException(Object sender, UnhandledExceptionEventArgs args)

Notice the Windows.controls.RadDiagnostics entry in the stacktrace.

I do run several methods in my Service Classes async and in a new thread.
If I need to update the GUI i use this block of code to avoid the cross-thread exception :

Deployment.Current.Dispatcher.BeginInvoke(() =>
{
    //Do GUI stuff here
});

PS : I have no custom implementation for the messagebox.

[Wim]

Here is a bit more info :

I have a Settings.XAML page, and a the bottom i have a application bar with several buttons.
I have added a new button with the following implementation :

private void ApplicationBarIconButton_Click(object sender, EventArgs e)
        {
            ThreadPool.QueueUserWorkItem((state) =>
            {
                throw new Exception("Test");
            });

        }

This will throw the invalid cross-thread exception.
If i change the event implementation to this, the exception is not thrown and the RadDiagnostics messagebox is shown :

private void ApplicationBarIconButton_Click(object sender, EventArgs e)
{
    throw new Exception("Test");
}

[Victor]

Hello Wim,

Thanks for writing and for the info.
We managed to reproduce the cross-thread exception. We will investigate the issue and will fix it if possible.
Please write again if you have more feedback to share, it's greatly appreciated.

Regards,
Victor
the Telerik team

[Omar]

I have some error....  :-(

[Wim]

Any updates on the issue ?

[Victor]

Hello Wim,

Thanks for the question. The issue is fixed.
Please download the latest internal build from your Telerik account.

Greetings,
Victor
the Telerik team