public void btnclear_Click(System.Object sender, System.EventArgs e)
{
Rno.Text = "Select";
cmbstartpoint.Text = "";
cmbdestination.Text = "";
BusSerialNo.Text = "Select";
BusNumber.Text = "Select";
BusType.Text = "Select";
BusReservation.Text = "Select";
Arrivaltime.Value = Convert.ToDateTime(DateTime.Now);
Departuretime.Value = Convert.ToDateTime(DateTime.Now);
SeatCapacity.Clear();
S1.Clear();
S2.Clear();
SeatAvailability.Clear();
SC2.Clear();
}