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PDF Viewer Unload document

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131468 Jul 11,2017 02:16 PM UTC Jul 12,2017 09:57 AM UTC WinForms 1
Tags: PdfViewer
Christoph Gasser
Asked On July 11, 2017 02:16 PM UTC

I have loaded a PDF successfully in the control. But when I close the application or try to unload the PDF document using "Unload" function, I get this error:

An unhandled exception of type 'System.ArgumentNullException' occurred in Syncfusion.Pdf.Base.dll
Additional information: Der Wert darf nicht NULL sein.

Any idea how to solve that?

Version: 15.1451.0.37


Balasubramanian Sundararajan [Syncfusion]
Replied On July 12, 2017 09:57 AM UTC

Hi Christoph, 

Thank you for using Syncfusion product. 

We are afraid that we are unable to reproduce “System.ArgumentNullException” thrown while unloading the PDF document from the PDF viewer control in Windows forms platform. We have created a simple sample to reproduce the reported exception and the sample can be downloaded from the following link, 

Can you please modify the above sample or provide us the sample with which the issue could be reproduced. Also provide the following details which will help us to analyze more and assist you better on the issue. 

PDF document: 
Syncfusion Essential Studio: 
Visual Studio: 
System Culture information:  
Operating System: 

Please let me know if you have any queries. 

Balasubramanian S 


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