C# 解析16进制字符串。将16进制字符串转换成明文字符串

        private static string HexStringToString(string hexString, Encoding encoding = null)
        {
            if (string.IsNullOrEmpty(hexString))
                return string.Empty;

            if (encoding == null)
                encoding = Encoding.ASCII;

            string[] byteitem = hexString.Trim().Split(‘ ‘);
            List<byte> lstByte = new List<byte>();
            foreach (string item in byteitem)
                lstByte.Add(Convert.ToByte(item, 16));

            return encoding.GetString(lstByte.ToArray());
        }

            string hexString = "73 6F 75 6E 64 34 2F 64 65 6D 6F 31 32 38 2E 6D 70 33 00";

            Console.WriteLine(HexStringToString(hexString)); //转换结果：sound4/demo128.mp3