汉字与16进制之间的转换

   /// <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();
   }

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);
   }

原文链接：https://blog.csdn.net/love_zt_love/article/details/6857994