private void btnBack_Click(object sender, EventArgs e)
        {
            switch (this.indexform)
            {
            case 0:
            {
                fVehicle f = new fVehicle(formQuanLyXeGui);
                formQuanLyXeGui.openChildForm(f);
                break;
            }

            case 1:
            {
                fotherServices_Park f = new fotherServices_Park(formQuanLyXeGui);
                formQuanLyXeGui.openChildForm(f);
                break;
            }

            case 2:
            {
                fotherServices_Fix f = new fotherServices_Fix(formQuanLyXeGui);
                formQuanLyXeGui.openChildForm(f);
                break;
            }

            case 3:
            {
                fotherServices_Wash f = new fotherServices_Wash(formQuanLyXeGui);
                formQuanLyXeGui.openChildForm(f);
                break;
            }
            }
        }
        private void btnOK_Click(object sender, EventArgs e)
        {
            this.vel.typeGui = this.cbLoaiGui.SelectedIndex;
            this.vel.ngayGui = DateTime.Now;

            if (this.vehParkBus.insertVehicle(this.vel) && this.vehicleBUS.UpdateStatusVehicle(this.vel.id, "PARK", 1))
            {
                MessageBox.Show("Insert Successfully");
                this.cbLoaiGui.SelectedIndex = -1;
                fVehicle f = new fVehicle(formQuanLyXeGui);
                formQuanLyXeGui.openChildForm(f);
            }
            else
            {
                MessageBox.Show("Insert Failed");
            }
        }