private void loadClick(object sender, EventArgs e)
        {
            //SalesRepositoryDB cltdb = new SalesRepositoryDB();
            // List<SalesRep> clientList = cltdb.GetAllSales();
            //this.dataGridView1.DataSource = clientList;

            ClientRepositoryDB cltdb = new ClientRepositoryDB();
            List <ClientRep>   cltrp = cltdb.GetAllClient();

            this.dataGridView1.DataSource = cltrp;
        }
        private void viewClient(object sender, EventArgs e)
        {
            groupBox3.Hide();

            ClientRepositoryDB cltdb = new ClientRepositoryDB();
            List <ClientRep>   cltrp = cltdb.GetAllClient();

            this.dataGridView1.DataSource = cltrp;

            viewClientPanel.Dock = DockStyle.Fill;
            viewClientPanel.Show();

            panelTrans.Hide();
            clientPanel.Hide();
            vehiclePanel.Hide();
            salesPanel.Hide();
        }