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  1.  Home
  2. RPG400-L
  3. April 2017

RE: New to RPG

Hi Bradley
MUCH appreciated

Alan Shore
E-mail : ASHORE@xxxxxxxx
Phone [O] : (631) 200-5019
Phone [C] : (631) 880-8640
'If you're going through hell, keep going.'
Winston Churchill


-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Bradley Stone
Sent: Friday, April 28, 2017 11:10 AM
To: RPG programming on the IBM i (AS/400 and iSeries) <rpg400-l@xxxxxxxxxxxx>
Subject: Re: New to RPG

Alan,

There's CGIDEV2, the ERPGSDK (https://www.bvstools.com/erpgsdk.html), and plenty of material out there to learn how to web program with RPG.

I just put an article together too about a utility I wrote over 15 years ago that will take a query definition from Query/400 and convert it into an eRPG program. This was before any kits like CGIDEV2 or eRPGSDK so it's using the Web APIs.

https://goo.gl/Eq75kb

There are also many books for the subject (eRPG Books) too which are
heavily discounted. Just ignore the old CERN HTTP server stuff in them
and it should be able to get you started.


Bradley V. Stone
www.bvstools.com
Native IBM i e-Mail solutions for Microsoft Office 365, Gmail, or any Cloud Provider!

On Fri, Apr 28, 2017 at 9:21 AM, Alan Shore <ashore@xxxxxxxx> wrote:

Hi Raul

I would LOVE,LOVE,LOVE to do that but I have no idea where to start
Any pointers, etc.?

Alan Shore
E-mail : ASHORE@xxxxxxxx
Phone [O] : (631) 200-5019
Phone [C] : (631) 880-8640
'If you're going through hell, keep going.'
Winston Churchill

-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of
Raul A Jager W
Sent: Friday, April 28, 2017 10:04 AM
To: rpg400-l@xxxxxxxxxxxx
Subject: Re: New to RPG

Do not use subfiles, use web instead.


On 04/28/2017 02:51 AM, Alan McKenzie wrote:
Hi Brent,

This is great advice from James.

I've been writing in RPG for the last 37 years and started out with
the
RPG Cycle. Having written in Assembler & Cobol before, it was hard to
understand, but once you grasp that you don't need to worry about
Opening & Closing files and other mundane programming tasks, it becomes very useful.
Send any messages my way and I will be only too happy to help.

One area that I am very poor on is developing programs using
sub-files
with interactive screens.

Rgrds,

Alan McKenzie
XA Consultant
CBI electric Telecom Cables (Pty) Ltd.
Registration Number: 1967/005978/07
Office: +27 12 381 1405 | Switchboard: +27 12 381 1400
Mobile: +27 (0) 82 453 7990
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From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of
James H. H. Lampert
Sent: 27 April 2017 06:39 PM
To: RPG programming on the IBM i (AS/400 and iSeries)
<rpg400-l@xxxxxxxxxxxx>
Subject: Re: New to RPG

The only thing I can think of to add is this:

DON'T BE AFRAID TO TAKE A RIDE ON "THE CYCLE."

Because of RPG's history (it's name means "Report Program
Generator"), it's designed to process entire files, and as such,
every RPG program (unless, in the more recent versions of RPG, you
explicitly disable
it) runs inside an implicit "DO UNTIL *INLR = TRUE" loop, and if you
designate a file as the "Primary File," each iteration of that
implicit do-loop begins with a read operation on that file, raising
the
"LR"
indicator when the last record of the file is read.

If you designate a Primary File, then The Cycle allows you to "ride"
through the file, processing each record in sequence, instead of
having to "walk" through it.

And if you don't designate a Primary File, then The Cycle can be
used as a built-in event loop for an interactive program: all you
need to do is raise the LR indicator whenever the user is ready to exit.

If you don't have a use for The Cycle in a given program, then you
need to either disable it explicitly, or else make sure LR gets raised.

WHAT YOU DO NOT WANT TO DO IS IGNORE "THE CYCLE." If you ignore The
Cycle, it will run over you.

--
JHHL
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