C# 16进制与字符串、字节数组之间的转换

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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);         }                /// <summary>         /// 字符串转16进制字节数组         /// </summary>        /// <param name="hexString"></param>         /// <returns></returns>         private static byte[] strToToHexByte(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;          }             /// <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;          }             /// <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>         public static 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>         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);          }

 

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/// <summary> /// 16进制字符串转换为8位二进制数组 /// </summary> /// <param name="hexString"></param> /// <returns></returns> private byte[] HexStrToByteArray(string hexString) {     hexString = hexString.Replace(" ", "");     if ((hexString.Length % 2) != 0)         throw new ArgumentException("十六进制字符串长度不对");     byte[] buffer = new byte[hexString.Length / 2];     for (int i = 0; i < buffer.Length; i++)     {         buffer[i] = Convert.ToByte(hexString.Substring(i * 2, 2).Trim(), 0x10);     }     return buffer; }