public ProductForm(string empUsername, string empID)
 {
     InitializeComponent();
     username         = empUsername;
     id               = empID;
     labUsername.Text = empUsername;
     uo               = new UpdateOrders(id);
 }
        private void btnUpdateOrder_Click(object sender, EventArgs e)
        {
            uo = new UpdateOrders(id);
            uo.ShowDialog();

            if (comboBox2.Text != "")
            {
                labTotal.Text = Total();
            }
            else
            {
                labTotal.Text = "0";
            }
        }