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unit Unit1;

interface

uses
  Jpeg, Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, DBCtrls, StdCtrls, Mask, DB, DBTables, ExtDlgs;

type
  TForm1 = class(TForm)
    DBEdit1: TDBEdit;
    Button1: TButton;
    DBImage1: TDBImage;
    DBNavigator1: TDBNavigator;
    DataSource1: TDataSource;
    Table1: TTable;
    OpenPictureDialog1: TOpenPictureDialog;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure DBImage1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
close;
end;

procedure TForm1.DBImage1Click(Sender: TObject);
begin
DBImage1.Picture.LoadFromFile(OpenPictureDialog1.FileName );
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
If OpenPictureDialog1.Execute then Begin

Table1.Edit;
Table1.FieldbyName('Bild').AsString:=OpenPictureDialog1.Filename;
Table1.Post;
End;

end;

end.					

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procedure Tform1.JPEGtoBMP(FileName : string);
var jpeg : TJPEGImage; 
    bmp : TBitmap; 
begin 
     jpeg:= TJPEGImage.Create; 
     try 
        jpeg.LoadFromFile(FileName ); 
        jpeg.CompressionQuality := 100; {Normaler Wert, kann weggelassen werden} 
        bmp:= TBitmap.Create; 
        try 
            bmp.Assign(jpeg);
            ForceDirectories(ExtractFilePath(Application.ExeName)+'graphics');
            bmp.SaveTofile(ExtractFilePath(Application.ExeName)+'graphics\logo.bmp');
        finally
               bmp.free
        end;
     finally 
            jpeg.free 
    end;					

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procedure TForm1.Table1AfterScroll(DataSet: TDataSet);
begin
  image1.picture := nil;
  if  not table1.FieldByName('Pfad').IsNull  then
      if  FileExists(table1.FieldByName('Pfad').AsString) then
          image1.Picture.LoadFromFile(table1.FieldByName('Pfad').AsString);
end;