WLC_Programming Knowledge

using System;
using System.Windows.Forms;

namespace NumberTypeConverter
{
    public partial class Octal_Conversion : Form
    {
        public Octal_Conversion()
        {
            InitializeComponent();
        }

        public string OctalToHexadecimal(int Oct)
        {
            //Octal to Binary
            string[] OctalConstant = { "000", "001", "010", "011", "100", "101", "110", "111" };
            int OctIndex, quotient = Oct;
            string binary = null, Hex = null, result=null;
            while (quotient != 0)
            {
                OctIndex = quotient % 10;
                if (OctIndex >= 8)
                {
                    MessageBox.Show("It's not Octal Number");
                    goto End;
                }
                else
                {
                    binary = OctalConstant[OctIndex] + "" + binary;
                    quotient /= 10;
                }           
            }
            
            //Binary To Hex  
            long fourDigit, bi = long.Parse(binary);
            while (bi != 0)
            {
                fourDigit = bi % 10000;
                if (fourDigit == 0) Hex = "0";
                if (fourDigit == 1) Hex = "1";
                if (fourDigit == 10) Hex = "2";
                if (fourDigit == 11) Hex = "3";
                if (fourDigit == 100) Hex = "4";
                if (fourDigit == 101) Hex = "5";
                if (fourDigit == 110) Hex = "6";
                if (fourDigit == 111) Hex = "7";
                if (fourDigit == 1000) Hex = "8";
                if (fourDigit == 1001) Hex = "9";
                if (fourDigit == 1010) Hex = "A";
                if (fourDigit == 1011) Hex = "B";
                if (fourDigit == 1100) Hex = "C";
                if (fourDigit == 1101) Hex = "D";
                if (fourDigit == 1110) Hex = "E";
                if (fourDigit == 1111) Hex = "F";
                result = Hex+""+result;
                bi /= 10000;            
            }
            End:
            return result;       
        }

        private void btnConvert_Click(object sender, EventArgs e)
        {
            if (txtOctal.Text !="")
            {
                txtHexadecimal.Text = OctalToHexadecimal(int.Parse(txtOctal.Text));                
            }
            txtOctal.Focus();
        }

        private void btnReset_Click(object sender, EventArgs e)
        {
            txtOctal.Clear();
            txtHexadecimal.Clear();
            txtOctal.Focus();
        }   
    }
}