public void PopulateAssignedCategoryData(Naznean_LarisaGabriela_ProiectContext context, Album Album)
{
var allCategories = context.Category;
var AlbumCategories = new HashSet <int>(
Album.AlbumCategories.Select(c => c.AlbumID)); //selecteaza albumul dat cu ID=AlbumID
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(Naznean_LarisaGabriela_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);
}
}
}
}