NullReferenceException when using PdfViewer in an AddIn

[Fonger]

I try to use the PdfViewer in an addin (using the .net managed addin framework), hosted in a winform host application. When I open a pdf file I get this exception:

   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Utils.Helper.get_Dispatcher() in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Documents\Fixed\Core\FormatProviders\Pdf\Utils\Helper.cs:line 25

   at Telerik.Windows.Documents.Fixed.FixedDocumentStreamSource.<>c__DisplayClass8.<LoadDocument>b__6() in c:\TB\105\WPF_Scrum\Release_WPF\Sources\Development\Documents\Fixed\FixedDocumentViewers\Fixed\FixedDocumentStreamSource.cs:line 180

   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)

   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

   at System.Threading.ThreadHelper.ThreadStart()

I suspect the helper class is using Application.Current.Dispatcher. Application.Current is null in our environment.

Is there a work around for this problem so I can use the viewer in an addin?

Thank you,

Fonger.

[Alexander]

Hello Fonger,

Thank you for contacting us.

I would suggest reading this article which describes some common problems concerning RadPdfViewer, one of which is the problem you are having.

I hope this is helpful. Please, do not hesitate to contact us if you have any other questions.

Regards,
Alexander
Telerik

[Fonger]

Hello Alexander,

Thanks for your reaction. I'm afraid your link isn't working (its just 'http:///'). Can you post it again?

Thanks,

Fonger.

[Petya]

Hello Fonger,

Please follow this link: http://www.telerik.com/help/wpf/radpdfviewer-troubleshooting-common-problems.html.

Let us know if you have other questions.

Regards,
Petya
Telerik