c#汉字拼音首字母

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ToothBond.Aiya.Common{    /// <summary>    /// 汉字转拼音首字母    /// </summary>    public static class ChineseToSpell    {        /// <summary>        /// 返回字符串首个拼音字母        /// </summary>        /// <param name="strText">汉字字符串</param>        /// <returns>返回由strText中第一个字符的拼音首字母</returns>        public static string GetFistSpell(string strText)        {            int len = strText.Length;            string myStr = "";            if (len > 0)            {                myStr = getSpell(strText.Substring(0, 1));            }            return myStr;        }        /// <summary>        /// 返回汉字字符串拼音首字母        /// </summary>        /// <param name="strText">汉字字符串</param>        /// <returns>返回由strText中字符及汉字部分的拼音首字母构成的字符串</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>        /// 返回一个汉字的拼音首字母        /// </summary>        /// <param name="cnChar"></param>        /// <returns></returns>        public static 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;        }    }}