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When it comes to reading data from PDF files in C#, there are a few free libraries available that you can consider: iTextSharp: iTextSharp is a popular open-source library for PDF manipulation in C#. It allows you to read, create, and modify PDF documents.
I’ve only ever had to generate new PDF documents using a free library called QuestPDF. Even for just that, it’s a nightmare if you can’t burn tons of cash on an expensive library like IronPDF or something. If you’re able, I would try to use a different file format if at all possible.
16 gru 2008 · Password protecting and encrypting your pdf files with the free and open source itextsharp library is quite easy: PdfReader reader = new PdfReader(input); PdfEncryptor.Encrypt(reader, output, true, "secret", "secret", PdfWriter.ALLOW_PRINTING);
Depends slightly on your idea of cheap. I've had really good results in the past with Aspose.Pdf for .Net ( http://www.aspose.com/.net/pdf-component.aspx) but it's not free. On the other hand its easy to use, well documented, and it's free to try.
PDFEncrypt is a free, open-source Windows app written in C# (.net 4.7.2) for encrypting (password protecting) PDF files quickly and easily. For privacy, the app does not upload the unencrypted files to a server: all encryption is performed on the local machine.
QuestPDF is a modern open-source .NET library for PDF document generation. Offering comprehensive layout engine powered by concise and discoverable C# Fluent API. Design PDF documents using C# and employ a code-only approach. Utilize your version control system to its fullest potential.
15 mar 2021 · Found this interesting library recently, check it out: https://www.questpdf.com/ While maybe not as fully featured as PDFSharp for document creation you could try my library (Apache 2 so you're good for licensing) - PdfPig.
