Read/Modify PDF Metadata using iTextSharp

问题

I am trying to use iTextSharp to read/modify PDF metadata. I figured out how to do it using pdfreader and pdfstamper. I was wondering if I could also read/modify additional metadata information like copyright information and few others within the XMP photoshop namespace.

I would greatly appreciate any pointers to the solution.

Thank you, Murugesh.

回答1:

You can read metadata using `PdfReader'. I've read metadata like this:

PdfReader reader = new PdfReader("HelloWorldNoMetadata.pdf");
string s = reader.Info["Author"];

You can try the iTextSharp.text.xml.xmp.XmpWriter class to write metadata. I've never done it but I found this code below:

PdfReader reader = new PdfReader("HelloWorldNoMetadata.pdf");
PdfStamper stamper = new PdfStamper(reader,
 new FileOutputStream("HelloWorldStampedMetadata.pdf"));
HashMap info = reader.getInfo();
info.put("Author", "Bruno Lowagie");
info.put("Title", "Hello World stamped");
stamper.setMoreInfo(info);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
XmpWriter xmp = new XmpWriter(baos, info);
xmp.close();
stamper.setXmpMetadata(baos.toByteArray());
stamper.close();

回答2:

Try the examples in the iTextSharp book there are examples on modifying any part of the pdf file!

来源：https://stackoverflow.com/questions/2761646/read-modify-pdf-metadata-using-itextsharp