Because you are getting the image data from a different source than the dataset
itself, traditionally you do this in the event OnEnterRect which exists for
this kind of situations, see for an example the Thumbnails Report in the
lazreport/samples/editor sample, I quote here the relevant part:
procedure TfrmMain.TheReportEnterRect(Memo: TStringList; View: TfrView);
begin
if (FImageList<>nil) and (View.Name='thumbnail') then begin
TFrPictureView(View).Picture.LoadFromFile(FImageList[FImageListIndex]);
Inc(FImageListIndex);
end;
end;
In your case you could probably do something like this:
if View is TfrPictureView then begin
TfrPictureView(View).Picture.LoadFromFile(
'test' + myQuery.FieldByName('Test_Int').asString+'.bmp')
end;
Which looks more simply than your proposed solution.
Regards.
Jesus Reyes A.
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