Q: 如何從 Blob 欄位中取得 Jpeg 圖形並加以顯示?
A: 參考下列程式碼 (from Brian Bushay (TeamB))

procedure TForm1.Table1AfterScroll(DataSet: TDataSet);
var
  MS: TMemoryStream;
  J1: TJPEGImage;
begin
  J1 := TJPEGImage.Create;
  MS := TMemoryStream.Create;
  try
    TBlobField(DataSet.Fields[1]).SaveToStream(MS);
    MS.Seek(soFromBeginning, 0);
    with J1 do begin
      PixelFormat := jf24Bit;
      Scale := jsFullSize;
      Grayscale := False;
      Performance := jpBestQuality;
      ProgressiveDisplay := True;
      ProgressiveEncoding := True;
      LoadFromStream(MS);
    end;
    Image1.Picture.Graphic.Assign(J1);
  finally
    J1.Free;
    MS.Free;
  end;
end;