Converting long string of binary to hex c#

Question

I\'m looking for a way to convert a long string of binary to a hex string.

the binary string looks something like this \"01100110100101110010011101010111001101

Answer 1

If you're using .NET 4.0 or later and if you're willing to use System.Numerics.dll (for BigInteger class), the following solution works fine:

public static string ConvertBigBinaryToHex(string bigBinary)
{
    BigInteger bigInt = BigInteger.Zero;
    int exponent = 0;

    for (int i = bigBinary.Length - 1; i >= 0; i--, exponent++)
    {
        if (bigBinary[i] == '1')
            bigInt += BigInteger.Pow(2, exponent);
    }

    return bigInt.ToString("X");
}