把汉字转换成拼音第一个字母

   /// <summary>
    /// 把汉字转换成拼音第一个字母
    /// </summary>
    /// <param name="ChineseStr">中文字符串 </param>
    /// <returns>返回首拼音字母 </returns>
    public static string ChineseCap(string ChineseStr)
    {
        string Capstr = "";
        byte[] ZW = new byte[2];
        long ChineseStr_int;
        string CharStr, ChinaStr = "";
        for (int i = 0; i <= ChineseStr.Length - 1; i++)
        {
            CharStr = ChineseStr.Substring(i, 1).ToString();
            ZW = System.Text.Encoding.Default.GetBytes(CharStr);
            // 得到汉字符的字节数组
            if (ZW.Length == 2)
            {
                int i1 = (short)(ZW[0]);
                int i2 = (short)(ZW[1]);
                ChineseStr_int = i1 * 256 + i2;

                #region 参数
                //table of the constant list
                // 'A';      //45217..45252
                // 'B';      //45253..45760
                // 'C';      //45761..46317
                // 'D';      //46318..46825
                // 'E';      //46826..47009
                // 'F';      //47010..47296
                // 'G';      //47297..47613

                // 'H';      //47614..48118
                // 'J';      //48119..49061
                // 'K';      //49062..49323
                // 'L';      //49324..49895
                // 'M';      //49896..50370
                // 'N';      //50371..50613
                // 'O';      //50614..50621
                // 'P';      //50622..50905
                // 'Q';      //50906..51386

                // 'R';      //51387..51445
                // 'S';      //51446..52217
                // 'T';      //52218..52697
                //没有U,V
                // 'W';      //52698..52979
                // 'X';      //52980..53640
                // 'Y';      //53689..54480
                // 'Z';      //54481..55289

                #endregion

                #region 判断
                if ((ChineseStr_int >= 45217) && (ChineseStr_int <= 45252))
                {
                    ChinaStr = "A";
                }
                else if ((ChineseStr_int >= 45253) && (ChineseStr_int <= 45760))
                {
                    ChinaStr = "B";
                }
                else if ((ChineseStr_int >= 45761) && (ChineseStr_int <= 46317))
                {
                    ChinaStr = "C";

                }
                else if ((ChineseStr_int >= 46318) && (ChineseStr_int <= 46825))
                {
                    ChinaStr = "D";
                }
                else if ((ChineseStr_int >= 46826) && (ChineseStr_int <= 47009))
                {
                    ChinaStr = "E";
                }
                else if ((ChineseStr_int >= 47010) && (ChineseStr_int <= 47296))
                {
                    ChinaStr = "F";
                }
                else if ((ChineseStr_int >= 47297) && (ChineseStr_int <= 47613))
                {
                    ChinaStr = "G";
                }
                else if ((ChineseStr_int >= 47614) && (ChineseStr_int <= 48118))
                {

                    ChinaStr = "H";
                }

                else if ((ChineseStr_int >= 48119) && (ChineseStr_int <= 49061))
                {
                    ChinaStr = "J";
                }
                else if ((ChineseStr_int >= 49062) && (ChineseStr_int <= 49323))
                {
                    ChinaStr = "K";
                }
                else if ((ChineseStr_int >= 49324) && (ChineseStr_int <= 49895))
                {
                    ChinaStr = "L";
                }
                else if ((ChineseStr_int >= 49896) && (ChineseStr_int <= 50370))
                {
                    ChinaStr = "M";
                }

                else if ((ChineseStr_int >= 50371) && (ChineseStr_int <= 50613))
                {
                    ChinaStr = "N";

                }
                else if ((ChineseStr_int >= 50614) && (ChineseStr_int <= 50621))
                {
                    ChinaStr = "O";
                }
                else if ((ChineseStr_int >= 50622) && (ChineseStr_int <= 50905))
                {
                    ChinaStr = "P";

                }
                else if ((ChineseStr_int >= 50906) && (ChineseStr_int <= 51386))
                {
                    ChinaStr = "Q";

                }

                else if ((ChineseStr_int >= 51387) && (ChineseStr_int <= 51445))
                {
                    ChinaStr = "R";
                }
                else if ((ChineseStr_int >= 51446) && (ChineseStr_int <= 52217))
                {
                    ChinaStr = "S";
                }
                else if ((ChineseStr_int >= 52218) && (ChineseStr_int <= 52697))
                {
                    ChinaStr = "T";
                }
                else if ((ChineseStr_int >= 52698) && (ChineseStr_int <= 52979))
                {
                    ChinaStr = "W";
                }
                else if ((ChineseStr_int >= 52980) && (ChineseStr_int <= 53640))
                {
                    ChinaStr = "X";
                }
                else if ((ChineseStr_int >= 53689) && (ChineseStr_int <= 54480))
                {
                    ChinaStr = "Y";
                }
                else if ((ChineseStr_int >= 54481) && (ChineseStr_int <= 55289))
                {
                    ChinaStr = "Z";
                }

                #endregion

            }
            else
            {
                Capstr = ChineseStr;
                break;
            }

            Capstr = Capstr + ChinaStr;
        }


        return Capstr;

    }