unit1.pas

delphi中利用COMBOBOX控件实现的首字母查询程序

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    sj: TEdit;
    SourceList: TListBox;
    ResultList: TListBox;
    Button1: TButton;
    searchbox: TComboBox;
    procedure sjChange(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure searchboxChange(Sender: TObject);
  
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
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;

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.sjChange(Sender: TObject);

var ResultStr:string;
begin
ResultStr:='';
ResultList.Items.Text := SearchByPYIndexStr
(Sourcelist.Items, Search.Text);

end;

procedure TForm1.Button1Click(Sender: TObject);
begin
close;
end;



procedure TForm1.searchboxChange(Sender: TObject);
var ResultStr1:string;
begin
ResultStr1:='';
searchbox.Text := SearchByPYIndexStr
(searchbox.Items, searchbox.Text);

end;

end.