//Airport's actions private void doVehicle() { Model.Vehicle mAirport = new Model.Vehicle(); Controller.Vehicle cAirport = new Controller.Vehicle(); if (cmbVehicleActions.SelectedIndex == 0)//nothing { MessageBox.Show("Please, choose an action!"); } else if (cmbVehicleActions.SelectedIndex == 1)//select { refreshVehicles(); } else if (cmbVehicleActions.SelectedIndex == 2)//delete { int select = dgvVehicles.CurrentCell.RowIndex; mAirport.id = Convert.ToInt32(dgvVehicles.Rows[select].Cells["cVehicleId"].Value.ToString()); cAirport = new Controller.Vehicle(mAirport); cAirport.delete(); refreshAirports(); } else if (cmbVehicleActions.SelectedIndex == 3)//update { saveVecicle(); } else if (cmbVehicleActions.SelectedIndex == 4)//insert { saveVecicle(); } }