public void PopulateAssignedCategoryData(Muntean_Tudor_ProiectContext context,
Vinyl vinyl)
{
var allCategories = context.Category;
var vinylCategories = new HashSet <int>(
vinyl.VinylCategories.Select(c => c.VinylID));
AssignedCategoryDataList = new List <AssignedCategoryData>();
foreach (var cat in allCategories)
{
AssignedCategoryDataList.Add(new AssignedCategoryData
{
CategoryID = cat.ID,
Name = cat.CategoryName,
Assigned = vinylCategories.Contains(cat.ID)
});
}
}
public void UpdateVinylCategories(Muntean_Tudor_ProiectContext context,
string[] selectedCategories, Vinyl vinylToUpdate)
{
if (selectedCategories == null)
{
vinylToUpdate.VinylCategories = new List <VinylCategory>();
return;
}
var selectedCategoriesHS = new HashSet <string>(selectedCategories);
var vinylCategories = new HashSet <int>
(vinylToUpdate.VinylCategories.Select(c => c.Category.ID));
foreach (var cat in context.Category)
{
if (selectedCategoriesHS.Contains(cat.ID.ToString()))
{
if (!vinylCategories.Contains(cat.ID))
{
vinylToUpdate.VinylCategories.Add(
new VinylCategory
{
VinylID = vinylToUpdate.ID,
CategoryID = cat.ID
});
}
}
else
{
if (vinylCategories.Contains(cat.ID))
{
VinylCategory courseToRemove
= vinylToUpdate
.VinylCategories
.SingleOrDefault(i => i.CategoryID == cat.ID);
context.Remove(courseToRemove);
}
}
}
}