16进制与字符串、字节数组之间的转换（一）

Z时代
2024-01-10
分类：综合
coding
  11.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  
  2
  3//十进制转二进制  
  4 Console.WriteLine("十进制166的二进制表示: "+Convert.ToString(166, 2));  
  5//十进制转八进制  
  6 Console.WriteLine("十进制166的八进制表示: "+Convert.ToString(166, 8));  
  7//十进制转十六进制  
  8 Console.WriteLine("十进制166的十六进制表示: "+Convert.ToString(166, 16));  
  9
 10//二进制转十进制  
 11 Console.WriteLine("二进制 111101 的十进制表示: "+Convert.ToInt32("111101", 2));  
 12//八进制转十进制  
 13 Console.WriteLine("八进制 44 的十进制表示: "+Convert.ToInt32("44", 8));  
 14//十六进制转十进制  
 15 Console.WriteLine("十六进制 CC的十进制表示: "+Convert.ToInt32("CC", 16));  
 16
 172.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  
 18//
 19
 20privatestring StringToHexString(string s,Encoding encode)  
 21        {  
 22byte[] b = encode.GetBytes(s);//按照指定编码将string编程字节数组  
 23string result = string.Empty;  
 24for (int i = 0; i < b.Length; i++)//逐字节变为16进制字符，以%隔开  
 25            {  
 26                 result += "%"+Convert.ToString(b[i], 16);  
 27            }  
 28return result;  
 29        }  
 30privatestring HexStringToString(string hs, Encoding encode)  
 31        {  
 32//以%分割字符串，并去掉空字符  
 33string[] chars = hs.Split(newchar[]{'%'},StringSplitOptions.RemoveEmptyEntries);  
 34byte[] b = newbyte[chars.Length];  
 35//逐个字符变为16进制字节数据  
 36for (int i = 0; i < chars.Length; i++)  
 37            {  
 38                 b[i] = Convert.ToByte(chars[i], 16);  
 39            }  
 40//按照指定编码将字节数组变为字符串  
 41return encode.GetString(b);  
 42        }  
 43
 44
 45
 46
 47///<summary>
 48/// 字符串转16进制字节数组  
 49///</summary>
 50///<param name="hexString"></param>
 51///<returns></returns>
 52privatestaticbyte[] strToToHexByte(string hexString)  
 53        {  
 54              hexString = hexString.Replace("", "");  
 55if ((hexString.Length % 2) != 0)  
 56                  hexString += "";  
 57byte[] returnBytes = newbyte[hexString.Length / 2];  
 58for (int i = 0; i < returnBytes.Length; i++)  
 59                 returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);  
 60return returnBytes;  
 61         }  
 62
 63
 64
 65
 66
 67///<summary>
 68/// 字节数组转16进制字符串  
 69///</summary>
 70///<param name="bytes"></param>
 71///<returns></returns>
 72publicstaticstring byteToHexStr(byte[] bytes)  
 73       {  
 74string returnStr = "";  
 75if (bytes != null)  
 76            {  
 77for (int i = 0; i < bytes.Length; i++)  
 78                {  
 79                      returnStr += bytes[i].ToString("X2");  
 80                 }  
 81             }  
 82return returnStr;  
 83         }  
 84
 85
 86
 87
 88
 89///<summary>
 90/// 从汉字转换到16进制  
 91///</summary>
 92///<param name="s"></param>
 93///<param name="charset">编码,如"utf-8","gb2312"</param>
 94///<param name="fenge">是否每字符用逗号分隔</param>
 95///<returns></returns>
 96publicstaticstring ToHex(string s, string charset, bool fenge)  
 97        {  
 98if ((s.Length % 2) != 0)  
 99            {  
100                  s += "";//空格  
101//throw new ArgumentException("s is not valid chinese string!");  
102             }  
103              System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);  
104byte[] bytes = chs.GetBytes(s);  
105string str = "";  
106for (int i = 0; i < bytes.Length; i++)  
107            {  
108                 str += string.Format("{0:X}", bytes[i]);  
109if (fenge && (i != bytes.Length - 1))  
110                {  
111                      str += string.Format("{0}", ",");  
112                 }  
113             }  
114return str.ToLower();  
115         }  
116
117
118
119
120
121///<summary>
122/// 从16进制转换成汉字  
123///</summary>
124///<param name="hex"></param>
125///<param name="charset">编码,如"utf-8","gb2312"</param>
126///<returns></returns>
127publicstaticstring UnHex(string hex, string charset)  
128        {  
129if (hex == null)  
130thrownew ArgumentNullException("hex");  
131              hex = hex.Replace(",", "");  
132              hex = hex.Replace("\n", "");  
133              hex = hex.Replace("\\", "");  
134              hex = hex.Replace("", "");  
135if (hex.Length % 2 != 0)  
136            {  
137                  hex += "20";//空格  
138             }  
139// 需要将 hex 转换成 byte 数组。   
140byte[] bytes = newbyte[hex.Length / 2];  
141
142for (int i = 0; i < bytes.Length; i++)  
143            {  
144try
145                {  
146// 每两个字符是一个 byte。   
147                      bytes[i] = byte.Parse(hex.Substring(i * 2, 2),  
148                     System.Globalization.NumberStyles.HexNumber);  
149                 }  
150catch
151                {  
152// Rethrow an exception with custom message.   
153thrownew ArgumentException("hex is not a valid hex number!", "hex");  
154                 }  
155             }  
156              System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);  
157return chs.GetString(bytes);  158          }