Printing from out a TService

rbuser

I have some problems using the reportbuilder 7 enterprise in combination
with an TService. The windows service needs to print a report,but when the
printing starts (using a aReport.Print instruction) the print thread
freezes. Has somebody an idea how can I solve this problem?

Thierry Van Schoote
ITM-Software

nardmoseley

-----------------------------------------------------------------
Tech Tip: Executing Reports in a Windows Service environment
------------------------------------------------------------------

1. Configure that report to suppress all dialogs

Report.ShowPrintDialog := False;
Report.ShowCancelDialog := False;
Report.ShowAutoSearchDialog := False;

2. Provide a thread-safe environment/container in which the report can
execute. See the RBuilder.hlp on the Background printing feature fpr
details.

3. Typically a Windows service application executes under a special user
account. To Print to the printer, you will need to install applicable
printer drivers excplicity to the user account.


--
Nard Moseley
Digital Metaphors
http://www.digital-metaphors.com

rbuser

Thanks,

It's working better now. I missed these new Background printing settings.
But I still have some problems.

1.After loading the report from a stream, I assigned programmatically
onFormat events for some TppText and TppVariable components. Untill now at
printing these events were fired as expected. When I start printing in
Background the events seems not to be fired anymore. If I disable the
Background printing with "ppReport.BackgroundPrintSettings.Enabled := false"
and "ppReport.BackgroundPrintSettings.Active := false" everything works
again. Have you an explanation therefore?

2.When can the thread-safe environement be freed? I mean, it's safe to write
something like this:
dm := TThreadSafeDataModule.create(nil);
dm.ppReport.Print;
dm.Free;

So the question is: Is the Print instruction synchrone when printing in
Background?

Thanks

Thierry Van Schoote
ITM-Software

nardmoseley

1. See the RBuilder.hlp topic for TppProducer.BackgroundPrintSettings. It
explains that a new instance of the report container is created when
printing to the background.

2. See the same topic as one above. I think you can free your report
instance without affecting the instance use in the background thread.
However, you do not want to quit the application - that will cause an issue.



--
Nard Moseley
Digital Metaphors
http://www.digital-metaphors.com