Threaded Report Generation

rbuser

Hi again!

I just made a report that is really heavy, takes like 2 minutes to generate
(+ 10.000 records) with 3 subreports with 2.000 records each).

Is it possible to send some code to help me put the report inside a TThread
and provide some feedback (like -> Printing Page 80 of 250...).

I?ve successfully made a feedback using OnStartPage / OnEndPage events using
Application.ProcessMessages but I want to give my users the ability to work
on something else while generating the "heavy" report.

Thanks again for your time and patience.

Best Regards.

Murilo

nardmoseley

- ReportBuilder contains built-in support for printing via a background
thread. See the online help topic for TppReport and then navigate to the
topic for Report.BackgroundPrintSettings

- Another option. If you have long reports that could be generated at
regular intervals (perhaps nightly) then you could write an application to
generate them to archive files (.raf) and then in the user application, use
the ArchiveReader to preview/print the archive files.



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

rbuser

Cool, the idea to generate it at night is nice! I will try that.

I will check the BackgroundPrintSettings,

Thanks for the help!

rbuser

Nard,

I checked the BackgroundPrintSettings property and made a Datamodule with my
Report, and all DB Pipelines, etc.

But I have the following error:

"TppBackgroundReportGenerator.ProcessRequest: Cannot Generate Report.
Arguments are of the wrong type, are out of acceptable range, or are in
conflict with one another"

Its because I cannot pass variables to a SubReport that I dynamically
loading.

In Detail Band's BeforePrint Event, I'm opening another dataset based on a
variable, which loads data for the subreport.

The same report opens fine when not using BackgroundPrintSettings.

Any ideas?

Thanks in advance

rbuser

Hah... it worked, problems with my parameterized query...

Sorry