/// <summary>
/// Method to initialize Picture Meta Data informations.
/// </summary>
/// <exception cref="ArgumentNullException">Occurs when invalid argument Picture file name is passed. Filename must be not null or empty or whitespace.</exception>
/// <exception cref="FileFormatException">Occurs when loading meta data failed.</exception>
private void Initialize()
{
if (Filename.IsNullOrWhiteSpace())
{
ArgumentNullException e = new ArgumentNullException($"Invalid argument Picture file name [{Filename}]. Filename must be not null or empty or whitespace.");
log.Error(e.Output(), e);
throw e;
}
Data.Filename = Filename;
Data.Comment = "";
Data.Copyright = "";
Data.DateTaken = "";
Data.Rating = 0;
Data.Title = "";
Data.Format = new System.Windows.Media.PixelFormat();
Data.Height = 0;
Data.Width = 0;
Data.PixelHeight = 0;
Data.PixelWidth = 0;
Data.Length = 0;
try
{
// open a filestream for the file we wish to look at
using (Stream fs = File.Open(Filename, FileMode.Open, FileAccess.ReadWrite))
{
Data.Length = fs.Length;
// create a decoder to parse the file
BitmapDecoder decoder = BitmapDecoder.Create(fs, BitmapCreateOptions.None, BitmapCacheOption.Default);
if (decoder == null || decoder.Frames.Count == 0)
{
log.Error("Creating bipmap decoder : failed ! ");
return;
}
// grab the bitmap frame, which contains the metadata
BitmapFrame frame = decoder.Frames[0];
if (frame == null)
{
log.Error("Getting bipmap decoder frame : failed ! ");
return;
}
Data.Format = frame.Format;
Data.Height = frame.Height;
Data.Width = frame.Width;
Data.PixelHeight = frame.PixelHeight;
Data.PixelWidth = frame.PixelWidth;
// get the metadata as BitmapMetadata
BitmapMetadata bmp = frame.Metadata as BitmapMetadata;
if (bmp == null)
{
log.Error("Getting bipmap metadata : failed ! ");
Data.DateTaken = new FileInfo(Filename).CreationTime.ToString();
return;
}
Data.Title = bmp.Title ?? Path.GetFileName(Filename);
Data.DateTaken = bmp.DateTaken;
Data.Copyright = bmp.Copyright;
Data.Comment = bmp.Comment;
Data.Rating = bmp.Rating;
}
}
catch (Exception e)
{
throw new FileFormatException("initializing picture meta data informations : failed !", e);
}
}
