qczlchx.pas

来自「Delphi实战演练一书的配套光盘」· PAS 代码 · 共 51 行

unit QcZlChx;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, Db, DBTables, Buttons, ExtCtrls, DBCtrls, Grids, DBGrids;

type
  TQczlChxFrm = class(TForm)
    DBGrid1: TDBGrid;
    DBNavigator1: TDBNavigator;
    BitBtn1: TBitBtn;
    DataSource1: TDataSource;
    Edit1: TEdit;
    Label1: TLabel;
    BitBtn2: TBitBtn;
    Query1: TQuery;
    procedure BitBtn1Click(Sender: TObject);
    procedure BitBtn2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  QczlChxFrm: TQczlChxFrm;

implementation

{$R *.DFM}

procedure TQczlChxFrm.BitBtn1Click(Sender: TObject);
begin
  Close;
end;

procedure TQczlChxFrm.BitBtn2Click(Sender: TObject);
begin
  Query1.Close;
  Query1.SQL.Clear;
  Query1.SQL.Add('Select * from QicheZL');
  Query1.SQL.Add('Where 名称<>''''');
  if Edit1.Text<>'' then
    Query1.SQL.Add('And 名称='''+Edit1.Text+'''');
  Query1.Open;
end;

end.