C# 获取汉字拼音首字母（修正X问题,真正修正）

• 话不多说,直接上代码,代码参考网上源码.其中存在X显示为?的问题.一共两种写法.目前该写法还是存在部分汉字无法正常转化的问题.另外一种方法在另一个帖子中说明.

/// <summary>
/// 将输入字符串英文部分变为大写,中文取拼音首字母大写.
/// </summary>
/// <param name="UnName"></param>
/// <returns></returns>
public static string GetCodstring(string UnName,string Coding)
{
    try
    {
        int i = 0;
        ushort key = 0;
        string strResult = string.Empty;
        Encoding unicode = Encoding.Unicode;
        Encoding gbk = Encoding.GetEncoding(Coding);
        byte[] unicodeBytes = unicode.GetBytes(UnName);
        byte[] gbkBytes = Encoding.Convert(unicode, gbk, unicodeBytes);
        while (i < gbkBytes.Length)
        {
            if (gbkBytes[i] <= 127)
            {
                strResult = strResult + ((char)gbkBytes[i]).ToString().ToUpper();
                i++;
            }
            #region 生成汉字拼音简码,取拼音首字母
            else
            {
                key = (ushort)(gbkBytes[i] * 256 + gbkBytes[i + 1]);
                if (key >= '\uB0A1' && key <= '\uB0C4')
                    strResult = strResult + "A";
                else if (key >= '\uB0C5' && key <= '\uB2C0')
                    strResult = strResult + "B";
                else if (key >= '\uB2C1' && key <= '\uB4ED')
                    strResult = strResult + "C";
                else if (key >= '\uB4EE' && key <= '\uB6E9')
                    strResult = strResult + "D";
                else if (key >= '\uB6EA' && key <= '\uB7A1')
                    strResult = strResult + "E";
                else if (key >= '\uB7A2' && key <= '\uB8C0')
                    strResult = strResult + "F";
                else if (key >= '\uB8C1' && key <= '\uB9FD')
                    strResult = strResult + "G";
                else if (key >= '\uB9FE' && key <= '\uBBF6')
                    strResult = strResult + "H";
                else if (key >= '\uBBF7' && key <= '\uBFA5')
                    strResult = strResult + "J";
                else if (key >= '\uBFA6' && key <= '\uC0AB')
                    strResult = strResult + "K";
                else if (key >= '\uC0AC' && key <= '\uC2E7')
                    strResult = strResult + "L";
                else if (key >= '\uC2E8' && key <= '\uC4C2')
                    strResult = strResult + "M";
                else if (key >= '\uC4C3' && key <= '\uC5B5')
                    strResult = strResult + "N";
                else if (key >= '\uC5B6' && key <= '\uC5BD')
                    strResult = strResult + "O";
                else if (key >= '\uC5BE' && key <= '\uC6D9')
                    strResult = strResult + "P";
                else if (key >= '\uC6DA' && key <= '\uC8BA')
                    strResult = strResult + "Q";
                else if (key >= '\uC8BB' && key <= '\uC8F5')
                    strResult = strResult + "R";
                else if (key >= '\uC8F6' && key <= '\uCBF9')
                    strResult = strResult + "S";
                else if (key >= '\uCBFA' && key <= '\uCDD9')
                    strResult = strResult + "T";
                else if (key >= '\uCDDA' && key <= '\uCEF3')
                    strResult = strResult + "W";
                else if (key >= '\uCEF4' && key <= '\uD1B8')
                    strResult = strResult + "X";
                else if (key >= '\uD1B9' && key <= '\uD4D0')
                    strResult = strResult + "Y";
                else if (key >= '\uD4D1' && key <= '\uD7F9')
                    strResult = strResult + "Z";
                else
                    strResult = strResult + "?";
                i = i + 2;
            }
            #endregion
        }
        return strResult;
    }
    catch (Exception e)
    {
        Console.WriteLine(e.ToString());
        return "";
    }
}
/// <summary> 
/// 在指定的字符串列表CnStr中检索符合拼音索引字符串 
/// </summary> 
/// <param name="CnStr">汉字字符串</param> 
/// <returns>相对应的汉语拼音首字母串</returns> 
public static string GetSpellCode(string CnStr)
{
    string strTemp = "";
    int iLen = CnStr.Length;
    int i = 0;
    for (i = 0; i <= iLen - 1; i++)
    {
        strTemp += GetCharSpellCode(CnStr.Substring(i, 1));
    }
    return strTemp;
}
/// <summary> 
/// 得到一个汉字的拼音第一个字母，如果是一个英文字母则直接返回大写字母 
/// </summary> 
/// <param name="CnChar">单个汉字</param> 
/// <returns>单个大写字母</returns> 
private static string GetCharSpellCode(string CnChar)
{
    long iCnChar;
    byte[] ZW = System.Text.Encoding.GetEncoding("GB2312").GetBytes(CnChar);
    //如果是字母，则直接返回 
    if (ZW.Length == 1)
        return CnChar.ToUpper();
    else
    {
        // 从单个字符获取字节数组
        int i1 = (short)(ZW[0]);
        int i2 = (short)(ZW[1]);
        iCnChar = i1 * 256 + i2;
    }
    /* 'A': //45217..45252 
    // 'B': //45253..45760 
    // 'C': //45761..46317 
    // 'D': //46318..46825 
    // 'E': //46826..47009 
    // 'F': //47010..47296 
    // 'G': //47297..47613 
    // 'H': //47614..48118 
    // 'J': //48119..49061 
    // 'K': //49062..49323 
    // 'L': //49324..49895 
    // 'M': //49896..50370 
    // 'N': //50371..50613 
    // 'O': //50614..50621 
    // 'P': //50622..50905 
    // 'Q': //50906..51386 
    // 'R': //51387..51445 
    // 'S': //51446..52217 
    // 'T': //52218..52697
    // 汉字没有没有U,V 开始的
    // 'W': //52698..52979 
    // 'X': //52980..53688
    // 'Y': //53689..54480 
    // 'Z': //54481..55289 
    // iCnChar 匹配常量*/
    if ((iCnChar >= 45217) && (iCnChar <= 45252))
        return "A";
    else if ((iCnChar >= 45253) && (iCnChar <= 45760))
        return "B";
    else if ((iCnChar >= 45761) && (iCnChar <= 46317))
        return "C";
    else if ((iCnChar >= 46318) && (iCnChar <= 46825))
        return "D";
    else if ((iCnChar >= 46826) && (iCnChar <= 47009))
        return "E";
    else if ((iCnChar >= 47010) && (iCnChar <= 47296))
        return "F";
    else if ((iCnChar >= 47297) && (iCnChar <= 47613))
        return "G";
    else if ((iCnChar >= 47614) && (iCnChar <= 48118))
        return "H";
    else if ((iCnChar >= 48119) && (iCnChar <= 49061))
        return "J";
    else if ((iCnChar >= 49062) && (iCnChar <= 49323))
        return "K";
    else if ((iCnChar >= 49324) && (iCnChar <= 49895))
        return "L";
    else if ((iCnChar >= 49896) && (iCnChar <= 50370))
        return "M";
    else if ((iCnChar >= 50371) && (iCnChar <= 50613))
        return "N";
    else if ((iCnChar >= 50614) && (iCnChar <= 50621))
        return "O";
    else if ((iCnChar >= 50622) && (iCnChar <= 50905))
        return "P";
    else if ((iCnChar >= 50906) && (iCnChar <= 51386))
        return "Q";
    else if ((iCnChar >= 51387) && (iCnChar <= 51445))
        return "R";
    else if ((iCnChar >= 51446) && (iCnChar <= 52217))
        return "S";
    else if ((iCnChar >= 52218) && (iCnChar <= 52697))
        return "T";
    else if ((iCnChar >= 52698) && (iCnChar <= 52979))
        return "W";
    else if ((iCnChar >= 52980) && (iCnChar <= 53688))
        return "X";
    else if ((iCnChar >= 53689) && (iCnChar <= 54480))
        return "Y";
    else if ((iCnChar >= 54481) && (iCnChar <= 55289))
        return "Z";
    else return ("?");
}