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port119  
#1 Posted : Tuesday, November 14, 2006 10:56:22 PM(UTC)
port119

Rank: Member

Groups: Member
Joined: 11/14/2006(UTC)
Posts: 1

am trying to figue out how to set the ExifDictionary.UserComment field. I tried
Code:
JpegReader jpegReader = (JpegReader) formatReader;
ExifDictionary exifData = jpegReader.Exif;
exifData[  ExifDictionary.UserComment  ] = "blah blah";
but this fails. any ideas? thanks! port119

Edited by user Tuesday, December 18, 2007 8:13:52 PM(UTC)  | Reason: Not specified

Dmitry  
#2 Posted : Thursday, November 16, 2006 6:47:50 PM(UTC)
Dmitry

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Groups: Member, Administration, Moderator
Joined: 8/3/2003(UTC)
Posts: 1,070

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Was thanked: 12 time(s) in 12 post(s)
Hello, This tag contains byte buffer which can include different types of information: ASCII, JIS, Unicode and undefibed. This information can be obtained from EXIF specification. Here is sample code which writes ASCII string in this tag:
Code:
string comment = "blah blah";
System.Text.ASCIIEncoding encoder = new System.Text.ASCIIEncoding();
	
// Byte buffer. This buffer contains string with 8 byte prefix, which includes information type.
byte[] array = new byte[comment.Length + 8];
array[7] = 2; // ASCII flag
encoder.GetBytes(comment).CopyTo(array, 8);
	
Aurigma.GraphicsMill.Codecs.JpegReader jpegReader = new Aurigma.GraphicsMill.Codecs.JpegReader(@"d:/temp/xmp/xmp1.jpg");
Aurigma.GraphicsMill.Codecs.JpegWriter writer = new Aurigma.GraphicsMill.Codecs.JpegWriter(@"d:/temp/UserComment.jpg");
	
// Write destination Jpeg.
Aurigma.GraphicsMill.Codecs.ExifDictionary exifData = jpegReader.Exif;
exifData[Aurigma.GraphicsMill.Codecs.ExifDictionary.UserComment] = array;
writer.Exif = exifData;
writer.AddFrame(jpegReader.LoadFrame(0));
	
writer.Close();
jpegReader .Close();

Edited by user Tuesday, December 18, 2007 8:16:33 PM(UTC)  | Reason: Not specified

Sincerely yours, Dmitry Sevostyanov UserPostedImage Follow Aurigma on Twitter!
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