public AlbumsLitstViewModel(IMusicDataService dataService, IEventAggregator eventAggregator)
{
if (dataService == null)
{
throw new ArgumentNullException("dataService");
}
if (eventAggregator == null)
{
throw new ArgumentNullException("eventAggregator");
}
this.dataService = dataService;
this.eventAggregator = eventAggregator;
this.Albums = new ListCollectionView(dataService.GetAlbums());
this.Albums.CurrentChanged += new EventHandler(this.SelectedAlbumChanged);
}
public ArtistListViewModel(IMusicDataService dataService, IEventAggregator eventAggregator)
{
if (dataService == null)
{
throw new ArgumentNullException("dataService");
}
if (eventAggregator == null)
{
throw new ArgumentNullException("eventAggregator");
}
this.dataService = dataService;
this.eventAggregator = eventAggregator;
var item = dataService.GetAlbums().Select(x => x.Artist).Distinct();
var distintc = item.GroupBy(x => x.ArtistId).Select(x => x.First());
this.Artists = new ListCollectionView(new ObservableCollection <Model.Artist>().AddRange(distintc.ToList()));
this.Artists.CurrentChanged += new EventHandler(this.SelectedArtistChanged);
}