unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Image1: TImage;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  i:integer;
begin
 //form2.Show;
 randomize;
 i:=random(11);
 case i of
 0:image1.Picture.LoadFromFile('暗像.bmp');
 1:image1.Picture.LoadFromFile('女像.bmp');
 2:image1.Picture.LoadFromFile('女像1.bmp');
 3:image1.Picture.LoadFromFile('手像.bmp');
 4:image1.Picture.LoadFromFile('鱼跃.bmp');
 5:image1.Picture.LoadFromFile('黄沙.bmp');
 6:image1.Picture.LoadFromFile('奔马.bmp');
 7:image1.Picture.LoadFromFile('女像.bmp');
 8:image1.Picture.LoadFromFile('多马奔驰.bmp');
 9:image1.Picture.LoadFromFile('天马飞腾.bmp');
 10:image1.Picture.LoadFromFile('冰箱.bmp');
 end;
end;

end.
那个高手能帮帮忙看出错在哪?我运行时报EInvalidgraphic类出错的,说:bitmap image is not valid. 这是什么意思?
按说我的代码应该没错呀.