获得汉字开头拼音

获得汉字的开头拼音：例如string key = GetChineseSpell("测试用的");   中key的值为CSYD

#region GetChineseSpell获取汉字拼音的第一个字母
    //获取汉字拼音的第一个字母
    static public string GetChineseSpell(string strText)
    {
        int len = strText.Length;
        string myStr = "";
        for (int i = 0; i < len; i++)
        {
            if (getCheck(strText.Substring(i, 1)))
                myStr += getSpell(strText.Substring(i, 1));
        }
        return myStr;
    }

    protected static bool getCheck(string text)
    {
        return Regex.IsMatch(text, "[\u4e00-\u9fa5]");
    }

    static public string[] GetChineseSpell(string[] strText)
    {
        int len = strText.Length;
        string[] myStr = null;
        for (int i = 0; i < len; i++)
        {
            myStr[i] = getSpell(strText[i]);
        }
        return myStr;
    }

    static public string getSpell(string cnChar)
    {
        byte[] arrCN = Encoding.Default.GetBytes(cnChar);
        if (arrCN.Length > 1)
        {
            int area = (short)arrCN[0];
            int pos = (short)arrCN[1];
            int code = (area << 8) + pos;
            int[] areacode = { 45217, 45253, 45761, 46318, 46826, 47010, 47297, 47614, 48119, 48119, 49062, 49324, 49896, 50371, 50614, 50622, 50906, 51387, 51446, 52218, 52698, 52698, 52698, 52980, 53689, 54481 };
            for (int i = 0; i < 26; i++)
            {
                int max = 55290;
                if (i != 25) max = areacode[i + 1];
                if (areacode[i] <= code && code < max)
                {
                    return Encoding.Default.GetString(new byte[] { (byte)(65 + i) });
                }
            }
            return "*";
        }
        else return cnChar;
    }
    #endregion