private void Button_ClickBasket(object sender, RoutedEventArgs e)
        {
            var CNum          = db.Clients.Where(n => n.Email == email).FirstOrDefault();
            var PNUm          = Convert.ToInt32((sender as Button).Uid);
            var checkBas      = db.Basketts.Where(b => b.ProdNum == PNUm && b.ClientNum == CNum.ClientNum).FirstOrDefault();
            var checkProdQuan = db.Products.Where(p => p.ProductNum == PNUm).FirstOrDefault();


            if (checkBas == null && checkProdQuan.Quantity > 0)
            {
                Basketts newPoint = new Basketts
                {
                    ClientNum = CNum.ClientNum,
                    ProdNum   = PNUm,

                    Quantity = 1
                };
                db.Basketts.Add(newPoint);
                MessageBox.Show("Товар добавлен в корзину");
            }
            else if (checkProdQuan.Quantity > checkBas.Quantity + 1)
            {
                checkBas.Quantity += 1;
                MessageBox.Show("Увеличели количество товара в корзине");
            }
            else
            {
                MessageBox.Show("Товара закончился");
            }
            db.SaveChanges();
        }
        private void Button_ClickBasket(object sender, RoutedEventArgs e)
        {
            CompEntities5 db       = new CompEntities5();
            var           CNum     = db.Clients.Where(n => n.Email == email).FirstOrDefault();
            var           PNUm     = Convert.ToInt32((sender as Button).Uid);
            var           checkBas = db.Basketts.Where(b => b.ProdNum == PNUm && b.ClientNum == CNum.ClientNum).FirstOrDefault();

            if (checkBas == null)
            {
                Basketts newPoint = new Basketts
                {
                    ClientNum = CNum.ClientNum,
                    ProdNum   = PNUm,

                    Quantity = 1
                };
                db.Basketts.Add(newPoint);
            }
            else
            {
                checkBas.Quantity += 1;
            }
            db.SaveChanges();
            MessageBox.Show("Товар добавлен в корзину");
        }