Delphi用拼音首字符序列实现检索功能

控件类型      属性名称  属性值

            Edit           Name      Search

            ListBox        Name      SourceList

            Items      输入一些字符串，如姓名等，用于提供检索数据

            ListBox        Name      ResultList

// 获取指定汉字的拼音索引字母，如：“汉”的索引字母是“H”

            function GetPYIndexChar( hzchar:string):char;

            begin

            case word(hzchar[1]) shl 8 + WORD(hzchar[2]) of

            $B0A1..$B0C4 : result := 'A';

            $B0C5..$B2C0 : result := 'B';

            $B2C1..$B4ED : result := 'C';

            $B4EE..$B6E9 : result := 'D';

            $B6EA..$B7A1 : result := 'E';

            $B7A2..$B8C0 : result := 'F';

            $B8C1..$B9FD : result := 'G';

            $B9FE..$BBF6 : result := 'H';

            $BBF7..$BFA5 : result := 'J';

            $BFA6..$C0AB : result := 'K';

            $C0AC..$C2E7 : result := 'L';

            $C2E8..$C4C2 : result := 'M';

            $C4C3..$C5B5 : result := 'N';

            $C5B6..$C5BD : result := 'O';

            $C5BE..$C6D9 : result := 'P';

            $C6DA..$C8BA : result := 'Q';

            $C8BB..$C8F5 : result := 'R';

            $C8F6..$CBF9 : result := 'S';

            $CBFA..$CDD9 : result := 'T';

            $CDDA..$CEF3 : result := 'W';

            $CEF4..$D188 : result := 'X';

            $D1B9..$D4D0 : result := 'Y';

            $D4D1..$D7F9 : result := 'Z';

            else

            result := char(0);

            end;

            end;

            // 在指定的字符串列表SourceStrs中检索符合拼音索引字符串

            PYIndexStr的所有字符串，并返回。

            function SearchByPYIndexStr

            ( SourceStrs:TStrings;

            PYIndexStr:string):string;

            label NotFound;

            var

            i, j   :integer;

            hzchar :string;

            begin

            for i:=0 to SourceStrs.Count-1 do

            begin

            for j:=1 to Length(PYIndexStr) do

            begin

            hzchar:=SourceStrs[i][2*j-1]

            + SourceStrs[i][2*j];

            if (PYIndexStr[j]<>'?') and

            (UpperCase(PYIndexStr[j]) <>

            GetPYIndexChar(hzchar)) then goto NotFound;

            end;

            if result=' then result := SourceStrs[i]

            else result := result + Char

            (13) + SourceStrs[i];

            NotFound:

            end;

            end;

procedure TForm1.SearchChange(Sender: TObject);

            var ResultStr:string;

            begin

            ResultStr:=';

            ResultList.Items.Text := SearchByPYIndexStr

            (Sourcelist.Items, Search.Text);

            end;