字符串与十六进制与byte和十进制之间的转化

 

 class StrOperate { ///

Convert a string of hex digits (ex: E4 CA B2) to a byte array.

/// The string containing the hex digits (with or without spaces). /// Returns an array of bytes. public static byte[] HexStringToByteArray(string s) { s = s.Replace(" ", ""); byte[] buffer = new byte[s.Length / 2]; for (int i = 0; i < s.Length; i += 2) buffer[i / 2] = (byte)Convert.ToByte(s.Substring(i, 2), 16); return buffer; } ///

Converts an array of bytes into a formatted string of hex digits (ex: E4 CA B2)

/// The array of bytes to be translated into a string of hex digits. /// Returns a well formatted string of hex digits with spacing. public static string ByteArrayToHexString(byte[] data) { StringBuilder sb = new StringBuilder(data.Length * 3); //foreach (byte b in data) // sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' ')); foreach (byte b in data) sb.Append(Convert.ToString(b, 16).PadLeft(2, '0')); return sb.ToString().ToUpper(); } public static string ByteArrayToHexString(byte[] data, int len) { byte[] temp_data = new byte[len]; for (int i = 0; i < len; i++) { temp_data[i] = data[i]; } StringBuilder sb = new StringBuilder(len * 3); //foreach (byte b in data) // sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' ')); foreach (byte b in temp_data) sb.Append(Convert.ToString(b, 16).PadLeft(2, '0')); return sb.ToString().ToUpper(); } ///

Reverse-Convert a string of hex digits (ex: E4 CA B2) to reverse.

/// The string containing the hex digits (with or without spaces). /// Returns reverse hex string . public static string ReverseHexString(string s) { s = s.Replace(" ", ""); string s_Temp = ""; byte temp = 0; //byte[] buffer = new byte[s.Length / 2]; for (int i = 0; i < s.Length; i++) { temp = Convert.ToByte(s.Substring(i, 1), 16); temp = Convert.ToByte(15 - temp); //取反 s_Temp += temp.ToString("X"); } return s_Temp; } ///

Converts an array of bytes into a formatted string of hex digits (ex: E4 CA B2)

/// The array of bytes to be translated into a string of hex digits. /// Returns a well formatted string of hex digits with spacing. public static string ReverseByteArrayToHexString(byte[] data) { StringBuilder sb = new StringBuilder(data.Length * 3); //foreach (byte b in data) // sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' ')); foreach (byte b in data) sb.Append(Convert.ToString(b, 16).PadLeft(2, '0')); return sb.ToString().ToUpper(); } //异或 public static string HexStringWithReverseHexStr(string s) { s = s.Replace(" ", ""); byte[] buffer = new byte[s.Length / 2]; byte temp = 0; for (int i = 0; i < s.Length; i += 2) { buffer[i / 2] = (byte)Convert.ToByte(s.Substring(i, 2), 16); temp = Convert.ToByte(temp ^ buffer[i / 2]); } s = Convert.ToString(temp, 16).PadLeft(2, '0').ToUpper(); return s; } public static string ByteArrayToAsciiString(byte[] data) { ASCIIEncoding ascii = new ASCIIEncoding(); string asciiString = ascii.GetString(data); return asciiString; } public static bool HexStringOrNot(string str) { str = str.ToUpper(); for (int i = 0; i < str.Length; i++) { switch (str[i]) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': break; default: { return false; } } } return true; } }

 

 

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 ///

/// 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 ///

/// 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 ///

/// 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(); } 16进制转换成汉字 ///

/// 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); }