public void DemoAdvancedUsage()
{
// ID3v2 Track Number frames allow you to specify not only the track number,
// but the total number of tracks as well. Use a TRCKFrame to get to this
// functionality. (The frame classes are named after their ID3v2.4 frame IDs,
// e.g. TRCK for Track Number and PRIV for Private Use.)
ID3v2Tag tag = new ID3v2Tag();
// This somewhat awkward method for creating frames does have some benefits
// in other areas.
TRCKFrame trackNumberFrame = (TRCKFrame)ID3v2Frame.GetNewFrame(FrameType.TrackNumber);
// Add the track number data.
trackNumberFrame.TrackNumber = 1;
trackNumberFrame.TotalTracks = 10;
// Add the frame to the tag.
tag.AddFrame(trackNumberFrame);
// Most of the usual frames are simple implemented as TextInformationFrame's.
TextInformationFrame artistFrame = (TextInformationFrame)ID3v2Frame.GetNewFrame(FrameType.LeadArtist);
artistFrame.Text = "My Artist";
tag.AddFrame(artistFrame);
// Now that the artist frame is there, the Artist property will work
Console.WriteLine("Artist: " + tag.Artist);
// but the others still don't.
if (tag.HasAlbum)
{
Console.WriteLine("Hmmmm....something didn't go right here.");
}
else
{
Console.WriteLine("Album (still null): " + tag.Album);
}
// While we're on the topic of the properties, TrackNumber works, but only returns
// the track number, not the total tracks (can't fit both into one int, of course)
Console.WriteLine("Track Number: " + tag.TrackNumber);
// Use a Private frame (PRIVFrame) to hold some private data
PRIVFrame privateFrame = (PRIVFrame)ID3v2Frame.GetNewFrame(FrameType.Private);
privateFrame.OwnerIdentifier = "ID3Sharp demo";
privateFrame.PrivateData = new byte[] { 0x49, 0x44, 0x33, 0x53, 0x68, 0x61, 0x72, 0x70 };
tag.AddFrame(privateFrame);
// Write the tag out to a file
tag.WriteTag("advanced.tag", ID3Versions.V2_3);
// and read it back.
tag = ID3v2Tag.ReadTag("advanced.tag");
// Verify the contents
privateFrame = (PRIVFrame)tag[FrameType.Private];
Console.Write("Private Data: ");
foreach (byte dataByte in privateFrame.PrivateData)
{
Console.Write(dataByte);
Console.Write(" (" + (char)dataByte + ") ");
}
Console.WriteLine();
// Remove the frames, with a few (for demonstration) different methods
tag.RemoveFrame(privateFrame);
tag.RemoveFrame(FrameType.LeadArtist);
tag[FrameType.TrackNumber] = null;
tag.WriteTag("empty.tag", ID3Versions.V2_3);
// Questions? Problems? Suggestions? Post to a forum on the project site
// or send me an email.
}