mc_fwczxxcx.pas

1、系统环境要求：所有程序均在Windows98/XP操作系统下测试运行。 2、建议用户在系统上安装DELPHI7.0企业版。 3、如果数据库为SQL Server数据库

unit MC_FWCZXXCX;

interface

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

type
  TFWCZXXCX = class(TForm)
    GroupBox1: TGroupBox;
    DBGrid1: TDBGrid;
    BitBtn4: TBitBtn;
    ComboBox1: TComboBox;
    Label1: TLabel;
    ComboBox2: TComboBox;
    Edit1: TEdit;
    Query1: TQuery;
    DataSource1: TDataSource;
    BitBtn1: TBitBtn;
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure FormShow(Sender: TObject);
    procedure BitBtn1Click(Sender: TObject);
    procedure BitBtn4Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  FWCZXXCX: TFWCZXXCX;

implementation

{$R *.DFM}

procedure TFWCZXXCX.FormClose(Sender: TObject; var Action: TCloseAction);
begin
     FWCZXXCX.Release;
     FWCZXXCX:=Nil;
end;

procedure TFWCZXXCX.FormShow(Sender: TObject);
begin
     ComboBox1.ItemIndex:=0;
     ComboBox2.ItemIndex:=0;
end;

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

procedure TFWCZXXCX.BitBtn4Click(Sender: TObject);
begin
     if ComboBox2.Text='Like' then
     if Edit1.Text='*' then
        begin
             Query1.Close;
             Query1.SQL.Clear;
             Query1.SQL.Add('Select * From 房租费用表');
             Query1.Open;
        end
     else
        begin
             Query1.Close;
             Query1.SQL.Clear;
             Query1.SQL.Add('Select * From 房租费用表');
             Query1.SQL.Add('Where '+Combobox1.Items[ComboBox1.ItemIndex]+' Like '''+Edit1.Text+'%''');
             Query1.Open;
        end;
     if comboBox2.Text='=' then
        with Query1 do begin
             close;
             SQL.Clear;
             SQL.Add('Select * From 房租费用表');
             SQL.Add('Where '+ComboBox1.Items[ComboBox1.ItemIndex]+' = '''
                     +Edit1.Text+'''');
             Open; end;
     if ComboBox2.Text='>' then
        With Query1 do begin
             Close;
             SQL.Clear;
             SQL.Add('Select * From 房租费用表');
             SQL.Add('Where '+comboBox1.Items[ComboBox1.ItemIndex]+' > '''
                     +Edit1.Text+'''');
             Open; end;
     if ComboBox2.Text='<' then
        with Query1 do Begin
             Close;
             SQL.Clear;
             SQL.Add('Select * From 房租费用表');
             SQL.Add('Where '+ComboBox1.Items[ComboBox1.ItemIndex]+' < '''
                     +Edit1.Text+'''');
             Open; end;

end;

end.