unit3.~pas

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unit Unit3;

interface

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

  


type
  TForm2 = class(TForm)
    GroupBox1: TGroupBox;
    Gauge1: TGauge;
    Image2: TImage;
    Image3: TImage;
    SaveDialog1: TSaveDialog;
    OpenDialog1: TOpenDialog;
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form2: TForm2;

implementation

{$R *.dfm}

procedure TForm2.Button1Click(Sender: TObject);
var
  i: integer;
  DataFile: String;
begin
    DataFile := GetCurrentDir+'\Data\XQ_Data.MDF';
   try
    if not savedialog1.Execute then exit;
    if FileExists(savedialog1.FileName+'.mdf') then
    begin
      if Messagebox(handle,'存在数据库重名，是否覆盖？','存盘选项',mb_iconquestion+mb_yesno)=IDNo then Exit;
    end
    else
    begin
      for i:=Gauge1.MinValue to Gauge1.MaxValue do
        Gauge1.Progress := i;
      CopyFile(PChar(DataFile),PChar(SaveDialog1.FileName+'.mdb'),True);
      Messagebox(handle,'数据库备份成功！','备份数据',mb_iconinformation+mb_ok);
    end;
  except
    Messagebox(handle,'警告：数据库备份失败！','存盘错误',mb_iconwarning+mb_ok);
  end;
end;

end.