16进制与字符串、字节数组之间的转换

2.在串口通讯过程中，经常要用到 16进制与字符串、字节数组之间的转换
//

private string StringToHexString(string s,Encoding encode)
        {
            byte[] b = encode.GetBytes(s);//按照指定编码将string编程字节数组
            string result = string.Empty;
            for (int i = 0; i < b.Length; i++)//逐字节变为16进制字符，以%隔开
            {
                result += "%"+Convert.ToString(b[i], 16);
            }
            return result;
        }
        private string HexStringToString(string hs, Encoding encode)
        {
            //以%分割字符串，并去掉空字符
            string[] chars = hs.Split(new char[]{'%'},StringSplitOptions.RemoveEmptyEntries);
            byte[] b = new byte[chars.Length];
            //逐个字符变为16进制字节数据
            for (int i = 0; i < chars.Length; i++)
            {
                b[i] = Convert.ToByte(chars[i], 16);
            }
            //按照指定编码将字节数组变为字符串
            return encode.GetString(b);
        }

 

        /// <summary>
        /// 字符串转16进制字节数组
        /// </summary>
       /// <param name="hexString"></param>
        /// <returns></returns>
        privatestatic byte[] strToToHexByte(string hexString)
        {
             hexString = hexString.Replace("", "");
           if ((hexString.Length% 2)!= 0)
                 hexString += " ";
            byte[] returnBytes= newbyte[hexString.Length/ 2];
            for (int i= 0; i< returnBytes.Length; i++)
                returnBytes[i] = Convert.ToByte(hexString.Substring(i* 2,2), 16);
            return returnBytes;
         }

 

 

/// <summary>
        /// 字节数组转16进制字符串
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        publicstatic 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>
        /// 从汉字转换到16进制
        /// </summary>
        /// <param name="s"></param>
        /// <param name="charset">编码,如"utf-8","gb2312"</param>
        /// <param name="fenge">是否每字符用逗号分隔</param>
       /// <returns></returns>
        publicstatic string ToHex(string s,string charset,bool fenge)
        {
            if ((s.Length% 2)!= 0)
            {
                 s += " ";//空格
                //throw new ArgumentException("s is not valid chinese string!");
             }
             System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);
            byte[] bytes= chs.GetBytes(s);
            string str= "";
            for (int i= 0; i< bytes.Length; i++)
            {
                str += string.Format("{0:X}", bytes[i]);
                if (fenge&& (i != bytes.Length - 1))
                {
                     str += string.Format("{0}",",");
                 }
             }
            return str.ToLower();
         }

 

 

///<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>
        publicstatic 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= newbyte[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.
                    thrownew ArgumentException("hex is not a valid hex number!","hex");
                 }
             }
             System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);
            return chs.GetString(bytes);
         }

    #region 字符串和Byte之间的转化
        /// <summary>
        /// 数字和字节之间互转/// </summary>
        /// <param name="num"></param>
        /// <returns></returns>
        public staticint IntToBitConverter(int num) {int temp = 0; byte[] bytes = BitConverter.GetBytes(num);//将int32转换为字节数组
            temp = BitConverter.ToInt32(bytes, 0);//将字节数组内容再转成int32类型
            return temp; }/// <summary>
        /// 将字符串转为16进制字符，允许中文/// </summary>
        /// <param name="s"></param>
        /// <param name="encode"></param>
        /// <returns></returns>
        public staticstring StringToHexString(string s, Encoding encode ,string spanString) {byte[] b = encode.GetBytes(s);//按照指定编码将string编程字节数组
            string result = string.Empty; for (int i =0; i < b.Length; i++)//逐字节变为16进制字符
{ result += Convert.ToString(b[i], 16) + spanString; } return result; }/// <summary>
        /// 将16进制字符串转为字符串/// </summary>
        /// <param name="hs"></param>
        /// <param name="encode"></param>
        /// <returns></returns>
        public staticstring 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); }//按照指定编码将字节数组变为字符串
            return encode.GetString(b); }/// <summary>
        /// byte[]转为16进制字符串/// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        public staticstring ByteToHexStr(byte[] bytes) {string returnStr = ""; if (bytes !=null) { for (int i =0; i < bytes.Length; i++) { returnStr+= bytes[i].ToString("X2"); } }return returnStr; }/// <summary>
        /// 将16进制的字符串转为byte[]/// </summary>
        /// <param name="hexString"></param>
        /// <returns></returns>
        public staticbyte[] 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