C# 中文汉字首字母自动生成代码

#region 取汉字首字
        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;
        }

        #endregion

        #region 取首字母方法
        static public string getSpell(string myChar)
        {
            byte[] arrCN = System.Text.Encoding.Default.GetBytes(myChar);
            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 System.Text.Encoding.Default.GetString(new byte[] { (byte)(65 + i) });
                    }
                }
                return "*";
            }
            else return myChar;
        }
        #endregion

        private void dgv_YuanGong_CellEndEdit(object sender, DataGridViewCellEventArgs e)
        {
            string strYuanGongXingMing;
            for (int i = 0; i < dgv_YuanGong.Rows.Count; i++)
            {
                strYuanGongXingMing = dgv_YuanGong.Rows[i].Cells["名称"].Value.ToString().Trim();
                string DengLuMingCheng= GetChineseSpell(strYuanGongXingMing);
                dgv_YuanGong.Rows[i].Cells["登陆名称"].Value = DengLuMingCheng;
            }
        }