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 "0110011010010111001001110101011100110100001101101000011001010110001101101011"

I've tried using

hex = String.Format("{0:X2}", Convert.ToUInt64(hex, 2));

but that only works if the binary string fits into a Uint64 which if the string is long enough it won't.

is there another way to convert a string of binary into hex?

Thanks

Answer 1

I just knocked this up. Maybe you can use as a starting point...

public static string BinaryStringToHexString(string binary)
{
    if (string.IsNullOrEmpty(binary))
        return binary;

    StringBuilder result = new StringBuilder(binary.Length / 8 + 1);

    // TODO: check all 1's or 0's... throw otherwise

    int mod4Len = binary.Length % 8;
    if (mod4Len != 0)
    {
        // pad to length multiple of 8
        binary = binary.PadLeft(((binary.Length / 8) + 1) * 8, '0');
    }

    for (int i = 0; i < binary.Length; i += 8)
    {
        string eightBits = binary.Substring(i, 8);
        result.AppendFormat("{0:X2}", Convert.ToByte(eightBits, 2));
    }

    return result.ToString();
}