原文:

//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/// 
/// /// 
       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/// 
/// /// 
       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; }/// 
/// 从汉字转换到16进制/// 
/// /// 编码,如"utf-8","gb2312"/// 是否每字符用逗号分隔/// 
       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(); }///
/// 从16进制转换成汉字/// 
/// /// 编码,如"utf-8","gb2312"/// 
       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); }