Modify file properties programmatically

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I need to modify a file's properties programmatically, specifically the details under the 'Summary' tab when you right click on a file: Title, Subject, Author, Category, Comments.
Anybody know how to do this in C++ or C#?

Posted 10-May-10 23:00pm

Christo du Toit

Updated 10-May-10 23:42pm

Moak

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Pete O'Hanlon · Answer 1 · 2010-05-10T23:39:00

You can modify these properties using the Microsoft Developer Support OLE File Property Reader available here[^]. When you have installed this, it allows you to manipulate the underlying OleStorage. Here's a code sample:

MSIL

private void ChangeProp(string file, string author)
{
  DSOFile.OleDocumentPropertiesClass documentProperties = new DSOFile.OleDocumentPropertiesClass();
  DSOFile.SummaryProperties summaryProperties;

  try
  {
    documentProperties.Open(file, false, DSOFile.dsoFileOpenOptions.dsoOptionDefault);

    summaryProperties = documentProperties.SummaryProperties;
    summaryProperties.Author = author;
    documentProperties.Save();
  }
  finally
  {
    summaryProperties = null;
    documentProperties = null;
  }
}

Michel Godfroid · Answer 2 · 2010-05-10T23:26:00

I assume you're talking about office files.
for doc,xls,ppt files this is stored under http://msdn.microsoft.com/en-us/library/aa380369(VS.85).aspx (damn links are broken, this will lead you to definition of structured storage).
for docx,xlsx,pptx files, which are really zip files, I can't remember. You may which to read up on the ODF specification.
Note that you will have an easier task opening all these files with Office Automation, which will allow you to set these properties with little code.

Modify file properties programmatically

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