由漢字生成拼音碼，很實用的類

using System;
using System.Text;

namespace oops
{
public class ChineseConvertor
{
private ChineseConvertor() {}

/// <summary>
/// 獲取一串漢字的拼音聲母
/// </summary>
/// <param name="chinese">Unicode格式的漢字字串</param>
/// <returns>拼音聲母字串</returns>
/// <example>
/// “旺旺軟體工作室”轉換為“wwrjgzs”
/// </example>
public static String Convert(String chinese)
{
char[] buffer = new char[chinese.Length];
for(int i=0; i<chinese.Length; i++)
{
buffer[i] = Convert(chinese[i]);
}
return new String(buffer);
}

/// <summary>
/// 獲取一個漢字的拼音聲母
/// </summary>
/// <param name="chinese">Unicode格式的一個漢字</param>
/// <returns>漢字的聲母</returns>
public static char Convert(Char chinese)
{
Encoding gb2312 = Encoding.GetEncoding("GB2312");
Encoding unicode = Encoding.Unicode;

// Convert the string into a byte[].
byte[] unicodeBytes = unicode.GetBytes(new Char[] {chinese});
// Perform the conversion from one encoding to the other.
byte[] asciiBytes = Encoding.Convert(unicode, gb2312, unicodeBytes);

// 計算該漢字的GB-2312編碼
int n = (int)asciiBytes[0]<<8;
n += (int)asciiBytes[1];

// 根據漢字區域碼獲取拼音聲母
if (In(0xB0A1,0xB0C4,n)) return 'a';
if (In(0XB0C5,0XB2C0,n)) return 'b';
if (In(0xB2C1,0xB4ED,n)) return 'c';
if (In(0xB4EE,0xB6E9,n)) return 'd';
if (In(0xB6EA,0xB7A1,n)) return 'e';
if (In(0xB7A2,0xB8c0,n)) return 'f';
if (In(0xB8C1,0xB9FD,n)) return 'g';
if (In(0xB9FE,0xBBF6,n)) return 'h';
if (In(0xBBF7,0xBFA5,n)) return 'j';
if (In(0xBFA6,0xC0AB,n)) return 'k';
if (In(0xC0AC,0xC2E7,n)) return 'l';
if (In(0xC2E8,0xC4C2,n)) return 'm';
if (In(0xC4C3,0xC5B5,n)) return 'n';
if (In(0xC5B6,0xC5BD,n)) return 'o';
if (In(0xC5BE,0xC6D9,n)) return 'p';
if (In(0xC6DA,0xC8BA,n)) return 'q';
if (In(0xC8BB,0xC8F5,n)) return 'r';
if (In(0xC8F6,0xCBF0,n)) return 's';
if (In(0xCBFA,0xCDD9,n)) return 't';
if (In(0xCDDA,0xCEF3,n)) return 'w';
if (In(0xCEF4,0xD188,n)) return 'x';
if (In(0xD1B9,0xD4D0,n)) return 'y';
if (In(0xD4D1,0xD7F9,n)) return 'z';
return '\0';
}

private static bool In(int Lp, int Hp, int Value)
{
return ((Value<=Hp)&&(Value>=Lp));
}
}
}