private void button22_Click(object sender, EventArgs e)
        {
            VehicleRepositoryDB cltdb = new VehicleRepositoryDB();
            List <VehicleRep>   cltrp = cltdb.GetAllVehicle();

            this.dataGridView3.DataSource = cltrp;
        }
        private void vecView(object sender, EventArgs e)
        {
            groupBox5.Hide();

            dateTimePicker3.Text = DateTime.Now.ToString("dd/MM/yyyy");
            VehicleRepositoryDB cltdb = new VehicleRepositoryDB();
            List <VehicleRep>   cltrp = cltdb.GetAllVehicle();

            this.dataGridView3.DataSource = cltrp;

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

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