ASP.NET或WinFrom中获取汉子的拼音首字母

1.获得一个字符串的每个字的拼音首字母构成所需的字符串

        #region  获取首字母

        /// <summary>
        /// 这个办法是用来获得一个字符串的每个字的拼音首字母构成所需的字符串
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static 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;
        }

        /// <summary>
        /// 用来获得一个字的拼音首字母
        /// </summary>
        /// <param name="cnChar"></param>
        /// <returns></returns>
        private static 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;
            }
        }

        #endregion

例如：String str="你好";    GetChineseSpell("你好")  之后：str="NH";