Spire.PDFViewer is a powerful PDF Viewer component for .NET. It allows developers to load PDF document from stream, file and byte array.

Mon Jun 25, 2018 9:32 am

Hi all

I have a simple question, is it possible to validate the license when you start your application.
I have bought a license, but i want to make sure it is working or if are we using the free version.


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Joined: Tue May 29, 2018 10:38 am

Mon Jun 25, 2018 10:25 am


Thank you for your post.
Seeing if there's a warning message is the only way to judge whether the license has been applied successfully because using the commercial version without a license would absolutely generate a warning message in the output file.
In your case, you could first see if you are using the free version or commercial version according to the dll version. If you have confirmed that you are using the commercial version and there's no warning message in the output file, then the license works.
If the license did not work when using the commercial version, you would see a warning message in the top of the generated file like below.

E-iceblue support team
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