Question

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Detect if PDF file is correct (header PDF)

I want to validate that the data in a FileStream instance represents a valid PDF document. Specifically, I need to know that Adobe Reader will be able to successfully open the file.

Can anyone recommend an open source library or best practice for this task?

Answer 1

Take a look at iTextSharp , it should give you what you need.

EDIT:

I know it’s bad practice to use exceptions to control flow, but you could do this:

public bool IsValidPdf(string fileName)
{
   try
   {
      new iTextSharp.text.pdf.PdfReader(fileName);
      return true;
   }
   catch (iTextSharp.text.exceptions.InvalidPdfException)
   {
      return false;
   }
}