如何使用 ITextSharp 验证 pdf 是基于文本的？

Question

I need to verify that the pdf report is text based (and not bitmap based; however it could contain some images). I do not need to extract the text, just to verify that it is text based.

Is there a way how to perform such a verification using ITextSharp library?

Thanks in advance,

Stefan

Answer 1

You can look for text drawing commands easily enough. The least work on your part would be to try to extract the text and see if anything is there. Ideally you'd know some of the text it should contain and search for it. A single sentence or phrase would be plenty for this sort of testing.

Text extraction with iText is pretty trivial these days. Lots of examples floating around SO, and the web.