public void PopulateAssignedGenreData(Bondane_Carmen_ProiectContext context, Album album)
{
var allGenres = context.Genre;
var albumGenres = new HashSet <int>(
album.AlbumGenres.Select(c => c.AlbumID));
AssignedGenreDataList = new List <AssignedGenreData>();
foreach (var gen in allGenres)
{
AssignedGenreDataList.Add(new AssignedGenreData
{
GenreID = gen.ID,
Name = gen.GenreName,
Assigned = albumGenres.Contains(gen.ID)
});
}
}
public void UpdateAlbumGenres(Bondane_Carmen_ProiectContext context,
string[] selectedGenres, Album albumToUpdate)
{
if (selectedGenres == null)
{
albumToUpdate.AlbumGenres = new List <AlbumGenre>();
return;
}
var selectedGenresHS = new HashSet <string>(selectedGenres);
var albumGenres = new HashSet <int>
(albumToUpdate.AlbumGenres.Select(c => c.Genre.ID));
foreach (var gen in context.Genre)
{
if (selectedGenresHS.Contains(gen.ID.ToString()))
{
if (!albumGenres.Contains(gen.ID))
{
albumToUpdate.AlbumGenres.Add(
new AlbumGenre
{
AlbumID = albumToUpdate.ID,
GenreID = gen.ID
});
}
}
else
{
if (albumGenres.Contains(gen.ID))
{
AlbumGenre courseToRemove
= albumToUpdate
.AlbumGenres
.SingleOrDefault(i => i.GenreID == gen.ID);
context.Remove(courseToRemove);
}
}
}
}
