private void addButton_odbiorca_Click(object sender, EventArgs e)
        {
            OdbiorcaDesign obrForm = new OdbiorcaDesign();

            obrForm.ShowDialog();
            DB.showDataFromOdbiorca(odbiorcaTableView);
        }
        private void editButton_odbiorca_Click(object sender, EventArgs e)
        {
            int row = odbiorcaTableView.CurrentCellAddress.Y;

            string         name    = odbiorcaTableView.Rows[row].Cells[1].Value.ToString();
            string         surname = odbiorcaTableView.Rows[row].Cells[2].Value.ToString();
            int            id      = (int)odbiorcaTableView.Rows[row].Cells[0].Value;
            OdbiorcaDesign msgForm = new OdbiorcaDesign(id, name, surname);

            msgForm.ShowDialog();
            DB.showDataFromOdbiorca(odbiorcaTableView);
        }