C#取得汉字的拼音的首字母

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利用汉字在计算机里面的编码来的到汉字的首拼音。 

        /// <summary>
        /// GetChineseSpell方法:取得汉字字符串的拼音的首字母
        /// </summary>
        static public 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>
        /// getSpell方法:取得汉字字符的拼音的首字母
        /// </summary>
        static public string getSpell(string cnChar)
        {
            byte[] arrCN = System.Text.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 = {45217,3,45761,46318,46826,47010,47297,47614,48119,48119,49062,49324,49896,50371,50614,50622,50906,51387,51446,52218,52698,52698,52698,52980,53689,54481};
                for(int i=0;i<26;i++)
                {
                    int max = 55290;
                    if(i != 25) max = areacode[i+1];
                    if(areacode[i]<=code && code<max)
                    {
                        return System.Text.Encoding.Default.GetString(new byte[]{(byte)(65+i)});
                    }
                }
                return "*";
            }
            else return cnChar;
        } 

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