Validate an uploaded file is valid PDF file

[JRodman1]

I am scouring the documentation, but I don't see any examples of simply testing whether any file is a PDF. I need to test them as they are uploaded by users, so I can response appropriately. I can attempt to load it, but there is no documentation I found that tells me what exceptions to expect if its not valid. Is there an API reference somewhere? Something that explains the document model properties and methods?

[rachel.lei]

Hello,

Thanks for your inquiry.
You can specify the file format as PDF when calling the "LoadFromFile" method, like the below code. If the loaded document is not in PDF format, the application will throw the exception "Invalid/Unknown/Unsupported format".

Code: Select all

    PdfDocument pdf = new PdfDocument();
    pdf.LoadFromFile(filepath, FileFormat.PDF);

As for API reference, please visit the below link. Any other question, please feel free to contact us.
https://www.e-iceblue.com/Tutorials/API/Spire.PDF.html

Sincerely,
Rachel
E-iceblue support team