asp.net 通过拼音搜索中文的方法

        ///
        /// 静态方法，获取一个字符的汉字拼音的首字母
        ///
        ///
        /// 需要计算拼音首字母的串
        ///
        public static System.String getSpell(System.String cnChar)
        {
            System.Byte[] arrCN = System.Text.Encoding.Default.GetBytes(cnChar);
            if (arrCN.Length > 1)
            {
                System.Int32 area = (System.Int16)arrCN[0];
                System.Int32 pos = (System.Int16)arrCN[1];
                System.Int32 code = (area << 8) + pos;
                System.Int32[] 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 (System.Int32 i = 0; i < 26; i++)
                {
                    System.Int32 max = 55290;
                    if (i != 25)
                    {
                        max = areacode[i + 1];
                    }
                    if (areacode[i] <= code && code < max)
                    {
                        return System.Text.Encoding.Default.GetString(new System.Byte[] { (System.Byte)(65 + i) });
                    }
                }
                return "*";
            }
            else
            {
                return cnChar;
            }
        }