C# 16进制与字符串、字节数组之间的转换（串口通讯中）

1.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 = ; i < b.Length; i++)//逐字节变为16进制字符，以%隔开
             {
                 result += "%"+Convert.ToString(b[i], );
             }
             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 = ; i < chars.Length; i++)
             {
                 b[i] = Convert.ToByte(chars[i], );
             }
             //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>
        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;
         }

 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 = ; i < bytes.Length; i++)
                 {
                      returnStr += bytes[i].ToString("X2");
                  }
              }
             return returnStr;
          }

 从汉字转换到16进制
 /// <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 % ) != )
             {
                  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 = ; i < bytes.Length; i++)
             {
                 str += string.Format("{0:X}", bytes[i]);
                 if (fenge && (i != bytes.Length - ))
                 {
                      str += string.Format("{0}", ",");
                  }
              }
             return str.ToLower();
          }

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);
         }

转自：https://www.cnblogs.com/dj1232090/p/5737556.html