C# unicode 编码 和 解码

首先转换方面：

1.  byte[]   
2. bytes = System.Text.Encoding.UTF8.GetBytes(msgStr);  
3.  bytes = Encoding.Convert(Encoding.UTF8, Encoding.Unicode, bytes);  
4.  bytes = System.Text.Encoding.Unicode.GetBytes(msgStr);  
5. msgStr = System.Text.Encoding.GetEncoding("gb2312").GetString(Encoding.Convert(Encoding.Unicode, Encoding.GetEncoding("gb2312"), bytes));

编码："\\uxxxx" 转换为"\uxxxx"

解码："\uxxxx" 转换为"\\uxxxxx"

编码算法

1. //UNICODE字符转为中文   
2. 对这个方法做一点改进 使他支持中英混排   
3. public static string ConvertUnicodeStringToChinese(string unicodeString)   
4. {   
5. if (string.IsNullOrEmpty(unicodeString))   
6. return string.Empty;   
7.   
8. string outStr = unicodeString;   
9.   
10. Regex re = new Regex("\\\\u[0123456789abcdef]{4}", RegexOptions.IgnoreCase);   
11. MatchCollection mc = re.Matches(unicodeString);   
12. foreach (Match ma in mc)   
13. {   
14. outStr = outStr.Replace(ma.Value, ConverUnicodeStringToChar(ma.Value).ToString());   
15. }   
16. return outStr;   
17. }   
18.   
19. private static char ConverUnicodeStringToChar(string str)   
20. {   
21. char outStr = Char.MinValue;   
22. char)int.Parse(str.Remove(0, 2),  System.Globalization.NumberStyles.HexNumber);   
23. return outStr;   
24. }

解码：

1. static Regex reUnicode = new Regex(@"\\u([0-9a-fA-F]{4})", RegexOptions.Compiled);  
2. public static string ConvertChineseToUnicodeString(string chinese)  
3. {  
4.    MatchCollection mc = re.Matches(chinese);  
5. string unicodeString="";  
6. foreach(Match ma in mc)  
7.    {  
8. char c;  
9. if(Short.TryParse(ma.Remove(0,1), System.Globalization.NumberStyles.HexNumber, CultureInfo.InvariantCulture, out c))  
10.       {  
11. "\\u"+c);  
12.       }  
13.    }  
14. return unicodeString;  
15. }