C# 进制转换(二进制、十六进制、十进制互转)

//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); }