Wrong report loaded

rbuser

Hello.

I have a simple application with three TppReport objects on my mainform;
Report1, Report2, Report3
If I try to print/preview Report2 after having printed/previewed Report3, it
seems that Report3 is the one that is loaded.
When debuging, there is no doubt that the Report2 object is printed/called.
I can not verify that it is Report3 that is loaded, because I get AV in the
query assosiated with Report3.

Any Idea?

Thanks
Petter Topp
D 2007, RB 10 Ent.

nicocizik

Hi Petter,

How are you printing these reports? Are you able to recreate this issue by
simply placing three reports on a form along with three buttons, each
calling Report.Print for their corresponding report? In my quick testing,
this worked as expected.

--
Regards,

Nico Cizik
Digital Metaphors
http://www.digital-metaphors.com

rbuser

Hello Nico.

I have not had any problems with this before, so I don't think that this can
be reproduced...

The reports are based on a separate query using DBPipeline and aDbisam
queries.

if frmRapportVelger.cxRadioGroup1.ItemIndex = 0 then begin
if ReportPreview then begin
rpFraktBrev.DeviceType:= 'Screen';
rpFraktBrev.Print;
end
else begin
rpFraktBrev.DeviceType:= 'Printer';
rpFraktBrev.Print;
end;
end;
if frmRapportVelger.cxRadioGroup1.ItemIndex = 1 then begin
if ReportPreview then begin
rpFakturaGrunnlag.DeviceType:= 'Screen';
rpFakturaGrunnlag.Print;
//THIS IS WHERE THE EXCEPTION SHOWS, TELLING ME THAT A FIELD IN THE QUERY
BELONGING TO THE REPORT BELOW,
//DOES NOT EXIST. THERE ARE NO WAY THAT THE ASSOSIATED OBJECTS COULD BE
MIXED UP, NAMES ARE COMPLETELY DIFFERENT.
end
else begin
rpFakturaGrunnlag.DeviceType:= 'Printer';
rpFakturaGrunnlag.Print;
end;
Invoice;
end;
if frmRapportVelger.cxRadioGroup1.ItemIndex = 2 then begin
if ReportPreview then begin
rpAvviksRap.DeviceType:= 'Screen';
rpAvviksRap.Print;
end
else begin
rpAvviksRap.DeviceType:= 'Printer';
rpAvviksRap.Print;
end;
end;


There have been some problems with this app. bringing it from D7 to Delphi
2007, at some point I lost some components (TIdFTP and some XML objects) on
the form...
I was also having some problems when trying to copy one of the TppReport
objects (AV).
It could be some issues with the dfm file, but I don't know where to look.

Regards
Petter

rbuser

Hello Nico.

I have solved the issue, but this is realy a workaround...

I have dropped a new TppReport on my form, and copied the contents of my
original report.
Then the reports have been renamed so that the new report has the same name
as the original.

Now things work as supposed...

I have experienced problems with copying whole report object earlier, and
don't dare doing this any more.
If I should set up a new report who is very similar to an existing report,
how should I go about it?

Thanks
Petter


"Petter Topp" skrev i melding

nicocizik

Hi Petter,

We have not seen anything like this in the past. The fact that recreating
the report solved the problem leads me to believe that you perhaps had a
corrupt template (report definition). When dealing with complex reports you
might find it is best to recreate them from scratch if you need to copy
them. It usually will not take as much time as you think and will give you
a chance to refactor the original design.

--
Regards,

Nico Cizik
Digital Metaphors
http://www.digital-metaphors.com

nardmoseley

To manage resources more efficiently, a better design is to have only one
TppReport per form/datatmodule. Create the report form/datamodule instance
when a request to preview/print is made and afterwards free the
form/datamodule. For an example see RBuilder\Demos\Reports\Demo.dpr - this
project contains over 100 hundred reports. The application tutorials in the
Developers Guide contains a tutorial on how to create a similar application.

If you are loading reports from .rtm files or a database and you have more
than one TppReport instance per form/datamodule, then naming collisions can
occur when the report is loaded. In Delphi all components with a common
Owner (i.e. the Form/DataModule) must have a unique name.





--
Nard Moseley
Digital Metaphors
www.digital-metaphors.com

rbuser

Hello Nico.

In this application I don't see the need for loading templates from either
file or database, it's a very simple solution.
So if the reports aren't saved as templates, where are the reports inside a
TppReport stored?
Could this file be recreated?

Thanks
Petter

nardmoseley

If you perform a View as Text on the Delphi Form/DataModule, you will see
the report definition there. It is a composite object structure
Report.Bands[ ].Objects[ ]

--
Nard Moseley
Digital Metaphors
www.digital-metaphors.com

nardmoseley

Also make sure you have TppReport.SaveAsTemplate set to False.

--
Nard Moseley
Digital Metaphors
www.digital-metaphors.com