C#16进制与字符串、字节数组之间的转换

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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

1         private static byte[] strToToHexByte(string hexString)
2         {
3             hexString = hexString.Replace(" ", "");
4             if ((hexString.Length % 2) != 0)
5                 hexString += " ";
6             byte[] returnBytes = new byte[hexString.Length / 2];
7             for (int i = 0; i < returnBytes.Length; i++)
8                 returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
9             return returnBytes;
10         }

1         public static string byteToHexStr(byte[] bytes)
2         {
3             string returnStr = "";
4             if (bytes != null)
5             {
6                 for (int i = 0; i < bytes.Length; i++)
7                 {
8                     returnStr += bytes[i].ToString("X2");
9                 }
10             }
11             return returnStr;
12         }

1         public static string UnHex(string hex, string charset)
2         {
3             if (hex == null)
4                 throw new ArgumentNullException("hex");
5             hex = hex.Replace(",", "");
6             hex = hex.Replace("/n", "");
7             hex = hex.Replace("//", "");
8             hex = hex.Replace(" ", "");
9             if (hex.Length % 2 != 0)
10             {
11                 hex += "20";//空格
12             }
13             // 需要将 hex 转换成 byte 数组。
14             byte[] bytes = new byte[hex.Length / 2];
15
16             for (int i = 0; i < bytes.Length; i++)
17             {
18                 try
19                 {
20                     // 每两个字符是一个 byte。
21                     bytes[i] = byte.Parse(hex.Substring(i * 2, 2),
22                     System.Globalization.NumberStyles.HexNumber);
23                 }
24                 catch
25                 {
26                     // Rethrow an exception with custom message.
27                     throw new ArgumentException("hex is not a valid hex number!", "hex");
28                 }
29             }
30             System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);
31             return chs.GetString(bytes);
32         }

从汉字转换到16进制

1 public static string ToHex(string s, string charset, bool fenge)
2         {
3             if ((s.Length % 2) != 0)
4             {
5                 s += " ";//空格
6                 //throw new ArgumentException("s is not valid chinese string!");
7             }
8             System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);
9             byte[] bytes = chs.GetBytes(s);
10             string str = "";
11             for (int i = 0; i < bytes.Length; i++)
12             {
13                 str += string.Format("{0:X}", bytes[i]);
14                 if (fenge && (i != bytes.Length - 1))
15                 {
16                     str += string.Format("{0}", ",");
17                 }
18             }
19             return str.ToLower();
20         }