在IMAGE控件里如何正确的读入JPEG文件，并正确的从SQL SERVER7.0中读出重放回IMAGE控件?

[chen_yj]

[zgamer]

存入数据库中：
Image1.Picture.SaveToFile(FileName);
Query1.close;
Query1.Sql.Clear;
Query1.Sql.Add('Insert into TableName Values(:name,:image)');
Query1.ParamByName('name').AsString:=Edit1.Text;
Query1.ParamByName('image').LoadFromFile(FileName,ftBlob);
DeleteFile(FileName);
Query1.ExecSQL;
图片显示：

uses jpeg

procedure TForm1.ShowJpegClick(Sender:TObject);
var
Jp:TJpegImage;
begin
TBlobField(Table1.FieldByName('jpeg')).SaveToFile(FileName);
Jp:=TJpegImage.Create;
Jp.LoadFromFile(FileName);
Image1.Picture.Graphic:=Jp;
end;

[MaxBensia]

放入1个Tbutton,TOpendialog,Timage
unit Unit1;

interface

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

type
TForm1 = class(TForm)
Image1: TImage;
Button1: TButton;
OpenPictureDialog1: TOpenPictureDialog;
procedure FormCreate(Sender: TObject);
procedure FormPaint(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;
AJPEG : TJPEGImage;
x,y:integer;
implementation

{$R *.DFM}

procedure TForm1.FormCreate(Sender: TObject);
begin
Canvas.Pen.Color:=clBlack;
Canvas.Pen.Style:=psSolid;
Canvas.Brush.color:=clBtnFace;
Canvas.Brush.Style:=bsSolid; //以上是Canvas的属性
AJpeg:=TJpegImage.Create;//动态生成Jpeg;
AJpeg.LoadFromFile('X:\*.jpg') //打开JPEG 文件 ;
end;

procedure TForm1.FormPaint(Sender: TObject);
begin
Canvas.Rectangle(2,2,800,600);
x:=10;
y:=10;
Form1.Canvas.Draw(x,y,AJpeg); //以(x,y)为左上角输出 JPEG 文件;

end;

procedure TForm1.Button1Click(Sender: TObject);
begin
if OpenPictureDialog1.Execute then
begin
AJpeg.Free; //释放旧AJpeg;
AJpeg:=TJpegImage.Create; //产生新AJpeg;
AJpeg.LoadFromFile(OpenPictureDialog1.Filename); //打开JPEG文件;
end;
Canvas.Rectangle(2,2,800,600);
x:=10;
y:=10;
Form1.Canvas.Draw(x,y,AJpeg); //显示新AJpeg;

end;

end.