Wednesday, May 30, 2012

How do you convert Byte Array to Hexadecimal String, and vice versa, in C#?


This is probably a common question over the Internet, but I couldn't find an answer that neatly explains how you can convert a byte array to a hexadecimal string, and vice versa.



Any takers?


Source: Tips4all

2 comments:

  1. Either:

    public static string ByteArrayToString(byte[] ba)
    {
    StringBuilder hex = new StringBuilder(ba.Length * 2);
    foreach (byte b in ba)
    hex.AppendFormat("{0:x2}", b);
    return hex.ToString();
    }


    or:

    public static string ByteArrayToString(byte[] ba)
    {
    string hex = BitConverter.ToString(ba);
    return hex.Replace("-","");
    }


    There are even more variants of doing it, for example here.

    The reverse conversion would go like this:

    public static byte[] StringToByteArray(String hex)
    {
    int NumberChars = hex.Length;
    byte[] bytes = new byte[NumberChars / 2];
    for (int i = 0; i < NumberChars; i += 2)
    bytes[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16);
    return bytes;
    }

    ReplyDelete
  2. There's a class called SoapHexBinary that does exactly what you want.

    using System.Runtime.Remoting.Metadata.W3cXsd2001;

    public byte[] GetStringToBytes(string value)
    {
    SoapHexBinary shb = SoapHexBinary.Parse(value);
    return shb.Value;
    }

    public string GetBytesToString(byte[] value)
    {
    SoapHexBinary shb = new SoapHexBinary(value);
    return shb.ToString();
    }

    ReplyDelete