Rép. : Re: Subfile reversing display

While in debug mode, take a look at the different fields defined in the
subfile just before the write operation (and I mean right just before,
not one or 2 intructions prior), this should show you what is wrong.

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<Blake.Moorcroft@xxxxxxxxxx> 2009-03-30 14:34 >>>

Hello Booth...

The subfile procedure is generically constructed so we can apply it to
a
number of different files (kind of like a fill-in-the-blanks options).

Most of the files used are well over 2500 records in size.

I have already verified through the debug procedure that the the
relative
record number is set to 10 when the first record is read after a SETLL
is
used for record positioning, then the process does a READPE, with the
RRN
decrementing by one for each record that is read until the subfile is
filled. A subprocedure is in place in case the subfile is only
partially
filled (say there are only 7 records left before hitting the BOF), in
which case the procedure resets to the top of the list and reads
forward.
I've also tried a number of scenarios when paging back and forth to see
if
the RRN is not being properly set, but regrettably, it's resetting
exactly
as required for the paging options.

Have a good day.


Blake Moorcroft
Developer - Corporate
Russell A. Farrow Limited
1980 Ambassador Drive, PO Box 333, Windsor, Ontario N9C 3R4
Bus: 519-966-3003 ext. 566, Fax: 519-966-9870
blake.moorcroft@xxxxxxxxxx




Booth Martin <booth@xxxxxxxxxxxx>
Sent by: rpg400-l-bounces@xxxxxxxxxxxx
03/30/2009 02:10 PM
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RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>


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Subject
Re: Subfile reversing display






Standard first question: Would the whole subfile be under 2500 records

if you did a load all? If so, do a load all and forget the paging
business.

Now, to the issue. (sorry for the above preachment.)

It'd be my guess that the subfile is being loaded in the order the
records are being read. That leads me to believe you may have a reade

or a read mixed up? Perhaps the setll for the page back is not being

set correctly? Or possibly when reading back 20 (or 10) records and
then
reading forward there is mix up?

Debug might be the quickest way to see what is happening at the
beginning of the page back.

Blake.Moorcroft@xxxxxxxxxx wrote:

Hello all...

I'm running into a really weird situation and I'm wondering if

anyone's

ever encountered it before.

We're generating a subfile with 10 records (one page at a time,

subfile

size and page = 10), nothing fancy, with both regular and hidden

fields.

There are no issues with writing the records themselves.

When paging down (using the roll-up), the records proceed forward 10

at
a

time in ascending sequence.

If, however, the page up key (roll down) is used, the records appear

in
a

reversed order - the correct records appear, just out of sequence.

I've

included an example of what's happening:


Screen - starting position:

A Record
B Record
C Record
D Record


Screen after paging down:

E Record
F Record
G Record
H Record


Screen after paging up

D Record
C Record
B Record
A Record.

If we were now to hit the page down key again, we would get

E Record
F Record
G Record
H Record


The procedure is pulling the correct records, it's just not

displaying

them in the proper way.


This subfile procedure is used in a number of programs. I use it any

time

we need a subfile - basically cloned code. None of the other

programs

that use this code are having the same issue - there are around 40
different programs using it. The logical that is used during the

fill
of

this particular subfile is not unusual - a three key index with

ascending

controls on the keys - there are no omit or select functions. I have

checked the logical to verify the index properties.

I've checked the clear and display of the subfile and there are no
indicator issues.

I've stepped through the code with the debug procedure and watched

how
it

is writing the records, verifying the contents of each record's

fields
and

the relative record number associated to the record being written -

there

are no issues and the relative record number is being properly

assigned.

Any ideas?

Have a good day


Blake Moorcroft
Developer - Corporate
Russell A. Farrow Limited
1980 Ambassador Drive, PO Box 333, Windsor, Ontario N9C 3R4
Bus: 519-966-3003 ext. 566, Fax: 519-966-9870
blake.moorcroft@xxxxxxxxxx

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