private void BindTripID()
{
TripController tripController = new TripController();
TripCollection tripCollection = tripController.SelectList();
TripInfo tripInfo = new TripInfo();
tripInfo.TripCode = " - Select One - ";
tripInfo.TripID = null;
tripCollection.Insert(0, tripInfo);
this.cboTrip.DisplayMember = "TripCode";
this.cboTrip.ValueMember = "TripID";
this.cboTrip.DataSource = tripCollection;
this.cboTrip.SelectedIndex = 0;
}