Edit Metadata of PDF File with C# [closed]

问题:

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Closed 2 years ago.

i searching for methods or libarys to edit metadata of a pdf file like the programm becypdfmetaedit.

I want to write a program and i need this opton in this program. Perhaps you have some samples for c#.

Thanks

回答1:

Using PDF Sharp works like this:

using System;
using PdfSharp.Pdf;
using PdfSharp.Pdf.IO;

namespace ConsoleApplication1
{
  class Program
  {
    static void Main (string[] args)
    {
      Program p = new Program();
      p.Test();

    }

    public void Test ()
    {
      PdfDocument document = PdfReader.Open ("Test.pdf");

      document.Info.Author = "ME";

      document.Save ("Result");
    }
  }

}

回答2:

For PDFSharp: If you would like to change/add the metadata on the Custom Properties of a PDF you can use the PdfDocument.Info.Elements object.

    String filename = @"d:\temp\Hugo-input.pdf";
    String outputfile = @"d:\temp\Hugo-output.pdf";
    PdfDocument document = PdfReader.Open(filename);
    document.Info.Elements.Add(new KeyValuePair<String,PdfItem>("/MyKey",new PdfString("MyValue")));
    document.Save(outputfile);

Always start a custom key with a slash!

You can find the key and value when you open this document in Adobe Acrobat Reader -> File -> Properties -> Custom.

This works with PDFSharp 1.32

回答3:

I suppose you can do it with iTextSharp.

回答4:

Does the PdfDocumentInformation class from PDF Sharp fulfill your requirements.

回答5:

Pimping here - my company, Atalasoft, makes .NET components for working with images. Part of the suite includes the ability to read/write PDF document metadata. It's not free, but it is run-time royalty free for desktop applications.

The code for reading is simple:

PdfDocumentMetadata metadata = PdfDocumentMetadata.FromStream(sourceStream);

to edit it and write it back to the same stream:

meta.Title = "Knicholas Knickleby";
meta.Author = "Edmund Wells";
sourceStream.Seek(0, SeekOrigin.Begin);
meta.Append(sourceStream, false); // false means don't merge - overwrite

Custom fields are supported through a hashtable.

回答6:

Aspose.PDF or Aspose.PDF.Kit can do this for you.

回答7:

Docotic.Pdf library can be used to read and update metadata in PDF documents.

There is PdfDocument.Info property that can be used to change metadata of a PDF document (properties such as "Author", "Title").

And there is also PdfDocument.Metadata property that is useful if you need to access embedded XMP metadata in a PDF document. The library supports pre-defined XMP schemas and can also be used to set custom application-defined properties.

The library is free for non-commercial applications. (The library is no longer free since the 15th of February 2012)

Disclaimer: I work for the company.