public PartialViewResult OnGetRemoveItem(int orderId, int itemId)
{
var order = _context.Order
.Include(o => o.Items)
.ThenInclude(item => item.Product)
.FirstOrDefault(o => o.Id == orderId);
var item = _context.OrderItem.FirstOrDefault(it => it.Id == itemId);
order.Items.Remove(item);
_context.Attach(item).State = EntityState.Deleted;
_context.Attach(order).State = EntityState.Modified;
_context.SaveChanges();
var model = order.Items;
return(Partial("OrderItems/_ItemList", model));
}
