1 /// <summary>   
 2 /// 字符串轉16進制字節數組   
 3 /// </summary>   
 4 /// <param name="hexString"></param>   
 5 /// <returns></returns>   
 6 private static byte[] strToToHexByte(string hexString)   
 7 {   
 8     hexString = hexString.Replace(" ", "");   
 9     if ((hexString.Length % 2
 
) != 0)   
10     hexString += " ";   
11     byte[] returnBytes = new byte[hexString.Length / 2];   
12     for (int i = 0; i < returnBytes.Length; i++)   
13         returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);   
14     return returnBytes;   
15 }   
16   
17 /// <summary>
 
   
18 /// 字節數組轉16進制字符串   
19 /// </summary>   
20 /// <param name="bytes"></param>   
21 /// <returns></returns>   
22 public static string byteToHexStr(byte[] bytes)   
23 {   
24     string returnStr = "";   
25     if (bytes != null)   
26     {   
27         for (int i = 0; i < bytes.Length; i++)   
 
28         {   
29             returnStr += bytes[i].ToString("X2");   
30         }   
31     }   
32     return returnStr;   
33 }   
34   
35 /// <summary>   
36 /// 從漢字轉換到16進制   
37 /// </summary>   
38 /// <param name="s"></param>   
39 /// <param name="charset">編碼,如"utf-8","gb2312"</param>   
40 /// <param name="fenge">是否每字符用逗號分隔</param>   
41 /// <returns></returns>   
42 public static string ToHex(string s, string charset, bool fenge)   
43 {   
44     if ((s.Length % 2) != 0)   
45     {   
46         s += " ";//空格   
47         //throw new ArgumentException("s is not valid chinese string!");   
48     }   
49     System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);   
50     byte[] bytes = chs.GetBytes(s);   
51     string str = "";   
52     for (int i = 0; i < bytes.Length; i++)   
53     {   
54         str += string.Format("{0:X}", bytes[i]);   
55         if (fenge && (i != bytes.Length - 1))   
56         {   
57             str += string.Format("{0}", ",");   
58         }   
59     }   
60     return str.ToLower();   
61 }   
62   
63 ///<summary>   
64 /// 從16進制轉換成漢字   
65 /// </summary>   
66 /// <param name="hex"></param>   
67 /// <param name="charset">編碼,如"utf-8","gb2312"</param>   
68 /// <returns></returns>   
69 public static string UnHex(string hex, string charset)   
70 {   
71     if (hex == null)   
72     throw new ArgumentNullException("hex");   
73     hex = hex.Replace(",", "");   
74     hex = hex.Replace("\n", "");   
75     hex = hex.Replace("\\", "");   
76     hex = hex.Replace(" ", "");   
77     if (hex.Length % 2 != 0)   
78     {   
79         hex += "20";//空格   
80     }   
81     // 需要將 hex 轉換成 byte 數組。   
82     byte[] bytes = new byte[hex.Length / 2];   
83     for (int i = 0; i < bytes.Length; i++)   
84     {   
85         try   
86         {   
87             // 每兩個字符是一個 byte。   
88             bytes[i] = byte.Parse(hex.Substring(i * 2, 2),   
89             System.Globalization.NumberStyles.HexNumber);   
90         }   
91         catch   
92         {   
93             // Rethrow an exception with custom message.   
94             throw new ArgumentException("hex is not a valid hex number!", "hex");   
95         }   
96     }   
97     System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);   
98     return chs.GetString(bytes);   
99 }  

C# 16進制與字符串、字節數組之間的轉換（二）