C# 进制转换

1.请问c#中如何将十进制数的字符串转化成十六进制数的字符串

//十进制转二进制

Console.WriteLine("十进制166的二进制表示: "+Convert.ToString(166, 2));

//十进制转八进制

Console.WriteLine("十进制166的八进制表示: "+Convert.ToString(166, 8));

//十进制转十六进制

Console.WriteLine("十进制166的十六进制表示: "+Convert.ToString(166, 16));

//二进制转十进制

Console.WriteLine("二进制 111101 的十进制表示: "+Convert.ToInt32("111101", 2));

//八进制转十进制

Console.WriteLine("八进制 44 的十进制表示: "+Convert.ToInt32("44", 8));

//十六进制转十进制

Console.WriteLine("十六进制 CC的十进制表示: "+Convert.ToInt32("CC", 16));

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);

字符串转16进制字节数组

        ///<summary>

        /// 字符串转16进制字节数组

        ///</summary>

       ///<param name="hexString"></param>

        ///<returns></returns>

        privatestaticbyte[] 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;

         }

字节数组转16进制字符串

///<summary>

        /// 字节数组转16进制字符串

        ///<param name="bytes"></param>

        publicstaticstring byteToHexStr(byte[] bytes)

       {

            string returnStr ="";

            if (bytes !=null)

                for (int i =0; i < bytes.Length; i++)

                {

                     returnStr += bytes[i].ToString("X2");

                 }

             }

            return returnStr;

从汉字转换到16进制

        /// 从汉字转换到16进制

        ///<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>

        publicstaticstring 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();

16进制转换成汉字

        /// 从16进制转换成汉字

        ///<param name="hex"></param>

        publicstaticstring UnHex(string hex, string charset)

           if (hex ==null)

                thrownew 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");

            return chs.GetString(bytes);

 /// <summary>

        /// </summary>

        /// <param name="hexString"></param>

        /// <returns></returns>

private static byte[] strToToHexByte(string hexString =

"00445255303231323334233030303126313231313031313331352631323131303131333235263130233030303226313231313031313331372631323131303131333339263237")

            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);

            Decoder dest = Encoding.GetEncoding("gb2312").GetDecoder();

            char[] rst = new char[hexString.Length / 2];

            dest.GetChars(returnBytes, 0, returnBytes.Length, rst, 0);

            string aa = new string(rst);