Convert a decimal to the binary format : Convert « Data Types « C# / C Sharp






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Convert a decimal to the binary format

    
//GNU General Public License version 2 (GPLv2)
//http://cbasetest.codeplex.com/license

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace SDFL.Helper
{
    public class StrHelper
    {
        /// <summary>
        ///         Convert a decimal to the binary format.
        ///         like: 
        ///         stra = Convert.ToString(4, 2).PadLeft(8, '0');
        ///         //stra=00000100
        /// </summary>
        /// <param name="DecimalNum"></param>
        /// <returns></returns>
        public static string ToBinary(Int64 decimalNum)
        {
            Int64 binaryHolder;
            char[] binaryArray;
            string binaryResult = "";

            // fix issue#5943: StrHelper.ToBinary(0)  result "", it should be 0
            if (decimalNum == 0)
            {
                return "0";
            }
            // end fix issue#5943

            while (decimalNum > 0)
            {
                binaryHolder = decimalNum % 2;
                binaryResult += binaryHolder;
                decimalNum = decimalNum / 2;
            }

            // rever the binaryResult, e.g. we get 1101111, then revert to 1111011, this is the final result
            binaryArray = binaryResult.ToCharArray();
            Array.Reverse(binaryArray);
            binaryResult = new string(binaryArray);
            return binaryResult;
        }    

    }
}








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