C# byte[] 转换hex(16进制字符串)

1.byte[] 转换hex(16进制字符串)

   1.1 BitConverter方式

1var str = DateTime.Now.ToString();
2            var encode = Encoding.UTF8;
3            var bytes = encode.GetBytes(str);
4            var hex = BitConverter.ToString(bytes, 0).Replace("-", string.Empty).ToLower();
5            Console.WriteLine(hex);

   1.2 StringBuilder方式

1var str = DateTime.Now.ToString();
2            var encode = Encoding.UTF8;
3            var bytes = encode.GetBytes(str);
4            StringBuilder ret = new StringBuilder();
5            foreach (byte b in bytes)
6            {
7                //{0:X2} 大写
8                ret.AppendFormat("{0:x2}", b);
9            }
10            var hex = ret.ToString();
11            Console.WriteLine(hex);

2.hex(16进制字符串)转换 byte[]

1var inputByteArray = new byte[hex.Length / 2];
2            for (var x = 0; x < inputByteArray.Length; x++)
3            {
4                var i = Convert.ToInt32(hex.Substring(x * 2, 2), 16);
5                inputByteArray[x] = (byte)i;
6            }
7            str = encode.GetString(inputByteArray);
8            Console.WriteLine(str);

转自：  jamesbing   http://gaobing.cnblogs.com