Write ITPC metadata into image

Question

I have to modify the iptc metadata of 6000+ jpg images. Unfortunately, I didn't found any library or even an example for doing so.

Could you please give me a hint how to modify the metadata of images or point me to a site where I can inform myself?

possible duplicate of [IPTC .NET read/write c# library](http://stackoverflow.com/questions/5597079/iptc-net-read-write-c-sharp-library) — p.s.w.g, Apr 05 '13 at 21:49
I already read this question & answer, but as I understand it, the code only describes how to read metadata, not how to write it — Christopher, Apr 05 '13 at 21:56

score 1 · Answer 1 · answered Apr 05 '13 at 22:02

A quick glance at the System.Windows.Media.Imaging namespace revealed the InPlaceBitmapMetadaWriter class. I think this is what you're looking for:

Stream pngStream = new System.IO.FileStream("smiley.png", FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
PngBitmapDecoder pngDecoder = new PngBitmapDecoder(pngStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
BitmapFrame pngFrame = pngDecoder.Frames[0];
InPlaceBitmapMetadataWriter pngInplace = pngFrame.CreateInPlaceBitmapMetadataWriter();
if (pngInplace.TrySave() == true)
{
    pngInplace.SetQuery("/Text/Description", "Have a nice day."); 
}

pngStream.Close();

I'll have a look at it tomorrow. Thank you! – Christopher Apr 05 '13 at 22:17 — Christopher, Apr 05 '13 at 22:17

Write ITPC metadata into image

1 Answers1