C# Classwork - Allan - Book Seat

This question is taxing if you want to validate everything, like check if booking has already made, smoker/non smoker and the seat validation.



Another problem concerns the display of the seat arrangement, as shown in the picture.


Check it out for yourself...

private void btnBook_Click(object sender, EventArgs e)
{
try{
    int iSeatNo = 0;
    iSeatNo = int.Parse(txtSeat.Text);
    if (iSeatNo <= 10)
    {

    }
    else
    {
        MessageBox.Show("Seat Number not valid");
        txtSeat.Clear();
        txtSeat.Focus();
    }

    if ((iSeatNo <= 5) && (iSeatNo > 0) && (radSmoke.Checked == true))
    {
        if (book[iSeatNo - 1] == false)
        {
            book[iSeatNo - 1] = true;
            grpSmokingArea.Controls[iSeatNo-1].Text = "BOOKED";
            grpSmokingArea.Controls[iSeatNo-1].ForeColor = Color.Red;
            lblInfo.Text = "You have booked Seat # " + iSeatNo + " \nin the
            Smoking Area";
        }
        else
        {
            MessageBox.Show("Seat already taken");
        }
    }
    else if (radSmoke.Checked== true)
    {
        MessageBox.Show("Seat allowed in non-smoking section only");
        txtSeat.Clear();
        txtSeat.Focus();
        return;
    }

    /* Non Smoking */
    if ((iSeatNo > 5) && (iSeatNo <= 10) && (radNoSmoke.Checked == true))
    {
        if (book[iSeatNo - 1] == false)
        {
            book[iSeatNo - 1] = true;
            grpNonSmokingArea.Controls[iSeatNo - 6].Text = "BOOKED";
            grpNonSmokingArea.Controls[iSeatNo - 6].ForeColor = Color.Red;
            lblInfo.Text = "You have booked Seat # " + iSeatNo + " \nin the Non
            Smoking Area";
        }
        else
        {
            MessageBox.Show("Seat already taken");
        }
    }
    else if (radNoSmoke.Checked== true)
    {
        MessageBox.Show("Seat allowed in smoking section only");
        txtSeat.Clear();
        txtSeat.Focus();
        return;
    }


}

catch
{
    MessageBox.Show("Please enter correct Seat Number");
    txtSeat.Text = "";
    txtSeat.Focus();
}
}