querypassenger.~pas

该程序不能实现全程售票

unit QueryPassenger;

interface

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

type
  TQueryPassengerFrm = class(TForm)
    GroupBox1: TGroupBox;
    GroupBox2: TGroupBox;
    RadioButton1: TRadioButton;
    RadioButton2: TRadioButton;
    StringGrid1: TStringGrid;
    Button1: TButton;
    Button2: TButton;
    RadioButton3: TRadioButton;
    Edit1: TEdit;
    Edit2: TEdit;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  QueryPassengerFrm: TQueryPassengerFrm;
   count:integer;
implementation

uses Login;

{$R *.dfm}

procedure TQueryPassengerFrm.Button1Click(Sender: TObject);
var query:string;
    i:integer;
begin
    begin
     with stringgrid1 do
       begin
        cells[0,0]:='车次号';
        cells[1,0]:='身份证号';
        cells[2,0]:='购票时间';
        cells[3,0]:='出发站';
        cells[4,0]:='目的站';
        end;
 end;
   for i:=1 to count do
         begin
          with stringgrid1 do
           begin
            cells[0,i]:='';
            cells[1,i]:='';
            cells[2,i]:='';
            cells[3,i]:='';
            cells[4,i]:='';
            end;
           next;
         end;
    query:='';
    if Radiobutton1.checked=true then
       if edit1.text='' then
          showmessage('请输入相应查询条件')
       else
          query:='select * from 乘客 where passengerid like'+''''+'%'+edit1.text+'%'+''''+'order by passengerid'
    else
    if Radiobutton2.checked=true then
       if edit2.text='' then
          showmessage('请输入相应查询条件')
       else
          query:='select * from 乘客 where buytime like'+''''+'%'+edit2.text+'%'+''''+'order by passengerid'
      else
    if Radiobutton3.checked=true then
          query:='select * from 乘客 order by passengerid '
    else
    showmessage('请您输入一个查询条件');
    if query<>'' then
    begin
    with LoginFrm.ADOQuery1 do
     begin
       close;
       sql.clear;
       sql.add(query);
       open;
       first;
       if recordcount=0 then
          begin
          showmessage('对不起，没有符合条件的查询结果！请重新查询！');
          edit1.setfocus;
          edit1.Text:='';
          edit2.Text:='';
            end
       else
        begin
         count:=recordcount;
         StringGrid1.RowCount:=recordcount+1;
         for i:=1 to recordcount do
         begin
          with stringgrid1 do
           begin
            cells[0,i]:=fieldbyname('trainnum').asstring;
            cells[1,i]:=fieldbyname('passengerid').asstring;
            cells[2,i]:=fieldbyname('buytime').asstring;
            cells[3,i]:=fieldbyname('source').asstring;
            cells[4,i]:=fieldbyname('dest').asstring;
            end;
         next;
        end;
        edit1.Text:='';
        edit2.Text:='';
         end;
   end;
  end;
end;


procedure TQueryPassengerFrm.Button2Click(Sender: TObject);
var i:integer;
begin
       for i:=1 to count do
         begin
          with stringgrid1 do
           begin
            cells[0,i]:='';
            cells[1,i]:='';
            cells[2,i]:='';
            cells[3,i]:='';
            cells[4,i]:='';
            end;
           next;
         end;
       QueryPassengerFrm.hide;
end;



end.