public void PopulateAssignedCategoryData(Vaida_Sabina_ProiectContext context, Album album)
{
var allCategories = context.Category;
var albumCategories = new HashSet <int>(album.AlbumCategories.Select(c => c.AlbumID));
this.AssignedCategoryDataList = new List <AssignedCategoryData>();
foreach (var cat in allCategories)
{
AssignedCategoryDataList.Add(new AssignedCategoryData
{
CategoryID = cat.ID,
Name = cat.CategoryName,
Assigned = albumCategories.Contains(cat.ID)
});
}
}
public void UpdateAlbumCategories(Vaida_Sabina_ProiectContext context, string[] selectedCategories, Album albumToUpdate)
{
if (selectedCategories == null)
{
albumToUpdate.AlbumCategories = new List <AlbumCategory>();
return;
}
var selectedCategoriesHS = new HashSet <string>(selectedCategories);
var albumCategories = new HashSet <int>(albumToUpdate.AlbumCategories.Select(c => c.Category.ID));
foreach (var cat in context.Category)
{
if (selectedCategoriesHS.Contains(cat.ID.ToString()))
{
if (!albumCategories.Contains(cat.ID))
{
albumToUpdate.AlbumCategories.Add(
new AlbumCategory
{
AlbumID = albumToUpdate.ID,
CategoryID = cat.ID
});
}
}
else
{
if (albumCategories.Contains(cat.ID))
{
AlbumCategory courseToRemove = albumToUpdate
.AlbumCategories
.SingleOrDefault(i => i.CategoryID == cat.ID);
context.Remove(courseToRemove);
}
}
}
}