将汉字转换为拼音缩写的代码(C#)

/// <summary>
/// 汉字转拼音缩写
/// Code By MuseStudio@hotmail.com
/// 2004-11-30
/// </summary>
/// <param name="str">要转换的汉字字符串</param>
/// <returns>拼音缩写</returns>
public string GetPYString(string str)
{
    string tempStr = "";
    foreach(char c in str)
    {
        if((int)c >= 33 && (int)c <=126)
        {//字母和符号原样保留
            tempStr += c.ToString();
        }
        else
        {//累加拼音声母
            tempStr += GetPYChar(c.ToString());
        }
    }
    return tempStr;
}
/// <summary>
/// 取单个字符的拼音声母
/// Code By MuseStudio@hotmail.com
/// 2004-11-30
/// </summary>
/// <param name="c">要转换的单个汉字</param>
/// <returns>拼音声母</returns>
public string GetPYChar(string c)
{
    byte[] array = new byte[2];
    array = System.Text.Encoding.Default.GetBytes(c);
    int i = (short)(array[0] - '\0') * 256 + ((short)(array[1] - '\0'));
    if ( i < 0xB0A1) return "*";
    if ( i < 0xB0C5) return "a";
    if ( i < 0xB2C1) return "b";
    if ( i < 0xB4EE) return "c";
    if ( i < 0xB6EA) return "d";
    if ( i < 0xB7A2) return "e";
    if ( i < 0xB8C1) return "f";
    if ( i < 0xB9FE) return "g";
    if ( i < 0xBBF7) return "h";
    if ( i < 0xBFA6) return "g";
    if ( i < 0xC0AC) return "k";
    if ( i < 0xC2E8) return "l";
    if ( i < 0xC4C3) return "m";
    if ( i < 0xC5B6) return "n";
    if ( i < 0xC5BE) return "o";
    if ( i < 0xC6DA) return "p";
    if ( i < 0xC8BB) return "q";
    if ( i < 0xC8F6) return "r";
    if ( i < 0xCBFA) return "s";
    if ( i < 0xCDDA) return "t";
    if ( i < 0xCEF4) return "w";
    if ( i < 0xD1B9) return "x";
    if ( i < 0xD4D1) return "y";
    if ( i < 0xD7FA) return "z";
    return "*";
}