private void btnProductGetAll_Click(object sender, EventArgs e)
        {
            this.Hide();
            GetForm forma = new GetForm(Type.Product, null, ID);

            forma.ShowDialog();
        }
        private void btnEmployeeGetAll_Click(object sender, EventArgs e)
        {
            this.Hide();
            GetForm forma = new GetForm(Type.Employee, null, ID);

            forma.ShowDialog();
        }
        private void GetProductReducedPriceBtn_Click(object sender, EventArgs e)
        {
            this.Hide();
            GetForm forma = new GetForm(Type.ReducedPriceProduct, null, ID);

            forma.ShowDialog();
        }
        private void button7_Click(object sender, EventArgs e)
        {
            //obrisi proizvode kojima je istekao rok trajanja
            this.Hide();
            GetForm forma = new GetForm(Type.ProductExpDate, null, ID);

            forma.ShowDialog();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            //group box2 ok button
            this.Hide();
            switch (button.Name)
            {
            case "button4":
            {
                GetForm forma = new GetForm(Type.ProductSold, dateTimePicker1.Value.Date.ToString(), ID);
                forma.ShowDialog();
            }
            break;

            case "button1":
            {
                GetForm forma = new GetForm(Type.ProductExpDate, dateTimePicker1.Value.Date.ToString(), ID);
                forma.ShowDialog();
            }
            break;
            }
        }
        private void btnOk_Click(object sender, EventArgs e)
        {
            if (textBox1.Text != "")
            {
                switch (button.Name)
                {
                case "btnEmployeeDelete":
                {
                    if (DataProviders.EmployeeProvider.DeleteEmployee(textBox1.Text, ID))
                    {
                        MessageBox.Show("Izbrisan");
                    }
                    else
                    {
                        MessageBox.Show("Nemoguće brisanje!");
                    }
                } break;

                case "btnEmployeeGet":
                {
                    this.Hide();
                    GetForm forma = new GetForm(Type.Employee, textBox1.Text, ID);
                    forma.ShowDialog();
                }
                break;

                case "btnProductDelete":
                {
                    var product = DataProviders.ProductProvider.GetProduct(textBox1.Text, ID);
                    if (product != null)
                    {
                        DataProviders.ProductProvider.DeleteProduct(textBox1.Text, ID);
                        DataProviders.ProductExpirationDateProvider.DeleteProduct(product.ExpirationDate, ID, textBox1.Text);
                        // DataProviders.ProductSoldProvider.DeleteProduct(product.ExpirationDate,ID, textBox1.Text);
                        MessageBox.Show("Izbrisan");
                    }
                    else
                    {
                        MessageBox.Show("Nemoguće brisanje!");
                    }
                }
                break;

                case "btnProductGet":
                {
                    this.Hide();
                    GetForm forma = new GetForm(Type.Product, textBox1.Text, ID);
                    forma.ShowDialog();
                }
                break;

                case "ReducePriceBtn":
                {
                    var products = DataProviders.ProductExpirationDateProvider.ExpirationDate(ID, dateTimePicker1.Value);
                    foreach (var product in products)
                    {
                        DataProviders.ProductProvider.UpdateCostOfProduct(product.ID, product.MarketID, (Int32.Parse(product.Cost) * (1 - (float.Parse(textBox1.Text.ToString()) / 100))).ToString());
                    }
                    lblGroupBox2.Text = "Unesite barkod:";
                    button2.Visible   = true;
                }
                break;
                }
            }
            else
            {
                MessageBox.Show("Nije popunjeno polje ID");
            }
            groupBox1.Visible      = false;
            groupBox2.Visible      = false;
            PopustGroupBox.Visible = false;
        }