字串和byte的轉化操作：

#region 字串和Byte之間的轉化
        /// <summary>
        /// 數字和位元組之間互轉
        /// </summary>
        /// <param name="num"></param>
        /// <returns></returns>
        public static int IntToBitConverter(int num)
        {
            int temp = 0;
            byte[] bytes = BitConverter.GetBytes(num);//
 
將int32轉換為位元組陣列
            temp = BitConverter.ToInt32(bytes, 0);//將位元組陣列內容再轉成int32型別
            return temp;
        }

        /// <summary>
        /// 將字串轉為16進位制字元，允許中文
        /// </summary>
        /// <param name="s"></param>
        /// <param name="encode"></param>
        /// <returns></returns>
 

        public static string StringToHexString(string s, Encoding encode ,string spanString)
        {
            byte[] b = encode.GetBytes(s);//按照指定編碼將string程式設計位元組陣列
            string result = string.Empty;
            for (int i = 0; i < b.Length; i++)//逐位元組變為16進位制字元
            {
                result 
 
+= Convert.ToString(b[i], 16) + spanString;
            }
            return result;
        }
        /// <summary>
        /// 將16進位制字串轉為字串
        /// </summary>
        /// <param name="hs"></param>
        /// <param name="encode"></param>
        /// <returns></returns>
        public static string HexStringToString(string hs, Encoding encode)
        {
            string strTemp = "";
            byte[] b = new byte[hs.Length / 2];
            for (int i = 0; i < hs.Length / 2; i++)
            {
                strTemp = hs.Substring(i * 2, 2);
                b[i] = Convert.ToByte(strTemp, 16);
            }
            //按照指定編碼將位元組陣列變為字串
            return encode.GetString(b);
        }
        /// <summary>
        /// byte[]轉為16進位制字串
        /// </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;
        }
        /// <summary>
        /// 將16進位制的字串轉為byte[]
        /// </summary>
        /// <param name="hexString"></param>
        /// <returns></returns>
        public static byte[] StrToHexByte(string hexString)
        {
            hexString = hexString.Replace(" ", "");
            if ((hexString.Length % 2) != 0)
                hexString += " ";
            byte[] returnBytes = new byte[hexString.Length / 2];
            for (int i = 0; i < returnBytes.Length; i++)
                returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
            return returnBytes;
        }
        
        #endregion    

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