Converts a hexadecimal string to a byte array. - CSharp System

CSharp examples for System:Byte

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Description

Converts a hexadecimal string to a byte array.

Demo Code


using System.Text;
using System.Runtime.CompilerServices;
using System.Reflection;
using System.Linq;
using System.Globalization;
using System.Collections.Generic;
using System;//from w w w. j  a v a 2s.  c o m

public class Main{
        /// <summary>
        /// Converts a hexadecimal string to a byte array.
        /// </summary>
        /// <param name="hex">The hexadecimal string to convert.</param>
        /// <returns>The byte array representing the hexadecimal string.</returns>
        public static byte[] HexToByteArray(this string hex)
        {
            if (hex[0] == '0' && (hex[1] == 'x' || hex[1] == 'X'))
            {
                hex = hex.Substring(2);
            }

            byte[] result = new byte[hex.Length / 2];

            for (int i = 0; i < result.Length; i++)
            {
                result[i] = Convert.ToByte(hex.Substring(i * 2, 2), 16);
            }

            return result;
        }
}

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