C#获取汉字首字母

 　　　　/// <summary>
        /// 这个方法是用来获得一个字符串的每个字的拼音首字母组成所需的字符串
        /// </summary>
        /// <param name="strText"></param>
        /// <returns></returns>
        private string GetChineseSpell(string strText) 
        {
            int len = strText.Length;
            string myStr = "";
            for (int i = 0; i < len; i++)
            {
                myStr += getSpell(strText.Substring(i, 1));
              
            }

            return myStr.ToLower();
         }

        /// <summary>
        /// 用来获得一个字的拼音首字母
        /// </summary>
        /// <param name="cnChar"></param>
        /// <returns></returns>
        private string getSpell(string cnChar)
        {
            //将汉字转化为ASNI码,二进制序列
            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;
        }