有关byte的一些操作

项目中经常会遇到string、int或者Float类型转换成byte类型，整理了一下！

1、int装换成byte[]

byte[] Len = System.BitConverter.GetBytes(ContentLen);

2、byte[]转int

        /// <summary>
        /// byte[]转int
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        public static int ByteToInt(byte[] bytes)
        {
            int Len = bytes.Length;
            int Result = 0;
            for (int i = 0; i <= Len-1; i++)
            {
                int temp = int.Parse(Math.Pow(256,Len-i-1).ToString());
                Result = Result + ByteToIntNoParse(new byte[] { bytes[i] }) * temp;
            }
            return Result;
        }

3、字节数组转16进制字符串

        /// <summary>
        /// 字节数组转16进制字符串
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        public static string byteToHexStr(byte[] bytes)
        {
            string returnStr = "";
            if (bytes != null)
            {
                for (int i = 0; i < bytes.Length; i++)
                {
                    returnStr += bytes[i].ToString("X2");
                }
            }
            return returnStr;
        }

4、从16进制转换成汉字

        /// <summary>
        /// 从16进制转换成汉字
        /// </summary>
        /// <param name="hex"></param>
        /// <param name="charset">编码,如"utf-8","gb2312"</param>
        /// <returns></returns>
        public static string UnHex(string hex, string charset)
        {
            if (hex == null)
                throw new ArgumentNullException("hex");
            hex = hex.Replace(",", "");
            hex = hex.Replace("/n", "");
            hex = hex.Replace("//", "");
            hex = hex.Replace(" ", "");
            if (hex.Length % 2 != 0)
            {
                hex += "20";//空格
            }
            // 需要将 hex 转换成 byte 数组。
            byte[] bytes = new byte[hex.Length / 2];

            for (int i = 0; i < bytes.Length; i++)
            {
                try
                {
                    // 每两个字符是一个 byte。
                    bytes[i] = byte.Parse(hex.Substring(i * 2, 2),
                    System.Globalization.NumberStyles.HexNumber);
                }
                catch
                {
                    // Rethrow an exception with custom message.
                    throw new ArgumentException("hex is not a valid hex number!", "hex");
                }
            }
            System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);
            return chs.GetString(bytes);
        }

5、汉字转换成byte[]

byte[] Content = System.Text.Encoding.Default.GetBytes(RegCorssName);