Ok, it turns you that you cannot create new EXIF tags in .NET, they seem to expect you to steal a existing EXIF tag, change it, and save that. Well what if your image does not have ANY EXIF tags? Well here it is:
PropertyItem ThisProp = (PropertyItem)Activator.CreateInstance(typeof(PropertyItem),true);
ThisProp.Id = 270;
ThisProp.Type = 2;
ThisProp.Len = Encoding.ASCII.GetByteCount(bioID);
ThisProp.Value = Encoding.ASCII.GetBytes(bioID);
image.SetPropertyItem(ThisProp);
try
{
FileInfo SaveFile = newFileInfo(String.Format(@"{0}\{1}-{2}.jpg",
txtSaveDirectory.Text, txtFilenamePrefex.Text,
DateTime.Now.ToString("yyyyMMddhhmmss")));
image.Save(SaveFile.FullName, ImageFormat.Jpeg);
}
catch (Exception ex)
{
MessageBox.Show(
String.Format("Error ({0}) saving image.\n\n{1}"
, ex.GetType().ToString(), ex.Message)
, "Error Saveing Image");
}
This method basically uses reflection to create a new PropertyItem using its private constructor. I will disclaim that this is a bad idea, but in my cause it is only being used for an internal tool that only needs to last a few weeks.
If anyone finds a better way that does not require me to embed images, steal other images tags, or hand process JPEG files, then I am all for it.
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