private void btnLoadData_Click(object sender, RoutedEventArgs e)
        {
            ShopEntities db = new ShopEntities();

            var docs = from d in db.PRODUCTS select d;

            // wyświetla w konsoli
            foreach (var item in docs)
            {
                Console.WriteLine(item.id);
                Console.WriteLine(item.product_name);
                Console.WriteLine(item.product_description);
            }

            this.GridFillName.ItemsSource = db.PRODUCTS.ToList();
            // Jeżeli bede chciała zmienić nagłówki na ładniej napisane albo coś odjąć to
            // 25/ Zaheer
        }
        public MainWindow()
        {
            InitializeComponent();

            ShopEntities db = new ShopEntities();

            var docs = from d in db.PRODUCTS select d;

            // wyswietla w konsoli
            foreach (var item in docs)
            {
                Console.WriteLine(item.id);
                Console.WriteLine(item.product_name);
                Console.WriteLine(item.product_description);
            }

            this.GridFillName.ItemsSource = docs.ToList();
            // Jeżeli bede chciała zmienić nagłówki na ładniej napisane albo coś odjąć to
            // 25/ Zaheer
        }
        private void btnAdd_Click(object sender, RoutedEventArgs e)
        {
            ShopEntities db = new ShopEntities();

            PRODUCT productObject = new PRODUCT()
            {
                //id = 7,
                product_brand       = txtBrand.Text,
                product_category    = txtCategory.Text,
                product_name        = txtName.Text,
                product_description = txtDescription.Text,
                //product_discount = txtDiscount.Text,
                //product_price = txtPrice.Text,
                //profit_for_shop = ,
                //quantity_in_stock = 10,
                //quantity_sold = 200,
            };

            db.PRODUCTS.Add(productObject);
            db.SaveChanges();
        }