public AdminOrderHistoryViewModel(string customerNumber)
        {
            OrderHistory = OrderHistoryViewModel.GetOrderHistory(customerNumber);

            ApplicationUser user = System.Web.HttpContext.Current
                                   .GetOwinContext()
                                   .GetUserManager <ApplicationUserManager>()
                                   .FindById(customerNumber);

            CustomerName   = user.Name;
            CustomerNumber = customerNumber;

            using (FreeMarketEntities db = new FreeMarketEntities())
            {
                TotalOrders = db.OrderHeaders
                              .Count(c => c.CustomerNumber == customerNumber && (c.OrderStatus == "Confirmed" || c.OrderStatus == "Completed"));

                Quantities = db.GetItemHistory(customerNumber).ToList();

                DeliveryTypes = db.GetDeliveryTypeHistory(customerNumber).ToList();
            }
        }