subreport group header/footer

rbuser

Hi,
I have a subreport that is grouped by an ID field and there are 15 ID's so
its printed 15 times and spans across 3 pages.
Problem is, in the Preview window:
- page 1 comes out fine
- page 2 comes out without the Group Header and Footer(apart from the
first report)
- page 3 comes out fine

when I navigate back from page 3 to page 2, page 2 prints correctly, i.e,
the Group Header/Footer gets printed as it should...any idea as to why?

RB 6.03
Delphi 6.0

nardmoseley

As a test try commenting out all event-handler code that is associated with
the report. Make sure that you do not have any code that manipulates the
dataset in any manner while the report is generating.

if you have a master/detail linking relationship, make sure that it is
deinfed properly.


------------------------------------------------------
Tech Tip: Linking SQL Queries for Master/Detail Data
------------------------------------------------------

The following example shows two options for linking SQL queries to create a
master/detail relationship.

In this example, we are using Delphi's DBDemos data to create a
Customer/Order relationship. Thus we wish to link the Orders detail to the
Customer master.

I. Delphi Query Linking
------------------------

a. Set the detail TQuery.DataSource property to point to the master
query's TDataSource component.

b. In the SQL "Where" clause for the detail query use a ':' followed by
the linking field name from the master:

example
select *
from orders
where orders.CustNo = :CustNo

Now each time the master record position changes, the detail query will
automatically be refreshed with the correct result set.


II. RB DataPipeline Linking
-----------------------------

a. Set the detail DataPipeline.MasterDataPipeline to point to the master
DataPipeline.

b. Use the detail DataPipeline.MasterFieldLinks property to define the
linking relationship

c. In the SQL for the detail, retrieve all records and sort them by the
linking master field:

select *
from Orders
order by CustNo


Notes:

1. Using RB DataPipeline, each query is executed only a single time - thus
performance is much faster.

2. RB Professional and Enterprise Editions include a visual Data environment
for creating SQL queries, defining linking relationships, and creating
Ask-At-Runtime parameters. Using the RB tools you could create the above
linked queries in about 10 seconds.


--
Tech Support mailto:support@digital-metaphors.com
Digital Metaphors http://www.digital-metaphors.com


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

rbuser

Hi Nard.
I did that. I group it by a label field that has the ID. I set the
.Caption in the OnPrint event of the label so for each ID, its a different
Caption each time it fires and therefore I get my groups correctly(on Page 1
at least).
I stepped though my code and when its printing Page1, the OnPrint fires for
the first 5 ID's and the page fits 4 reports so those print correctly. When
I preview Page2, the OnPrint fired only once and it brought up the report
without the GroupHeader/Footer - which is probably why it doesn't show me
the groups because the ID's are not there...

rbuser

managed to fix it, I had the label it was grouping by in the Group Header,
moved it to detail band and works fine now.

nardmoseley

If you Group on a Label or Variable use the OnGetText event rather than
OnPrint or OnCalc. Due to timing of event firing, the OnGetText will work
much better.


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

rbuser

oh ok, thanks for that.