PDF 的一些资料

PDF Succinctly
https://www.syncfusion.com/ebooks/pdf

Create PDFs in ASP.NET - getting started with iTextSharp
http://www.mikesdotnetting.com/Article/80/Create-PDFs-in-ASP.NET-getting-started-with-iTextSharp

PDFTK
https://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/