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page up & page down coding


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lakshmibala

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Joined: 16 Jun 2004
Posts: 47

PostPosted: Wed Jun 23, 2004 10:47 am
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hi,

thanks so such for ur reply.

but what i want is actually the page up and page down logics.

in mainframes we use keys f7 & f8 for paging up and down.

we want the codings for this logic.

please do reply for my question

bye,
lakshmi
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priya

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Joined: 24 Jul 2003
Posts: 568
Location: Bangalore

PostPosted: Sun Jun 27, 2004 9:48 pm
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You can define your own PF Key for page up and down
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meetsrk

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Joined: 13 Jun 2004
Posts: 85

PostPosted: Tue Jul 06, 2004 9:17 pm
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i will tell u the logic....
conside the file has 20 records...

Code:

E001 ........
E002 ..............
E003 .........
.....
...
E020

in a screen if u displaying 5 records at a time...so for the first time first 5 records will be displayed. so use a select statment without any condition using a cursor. move the first 5 record onto the map field which having occurs clause.
so now the display is
Code:

E001 ........
E002 ..............
E003 .........
.....
E005 ...

set upper-limit = E001, lower-limit = E005
if user opts for page down.. then use a select statement like
Code:

select * from demo_table where ecode > lower-limit;

then display the next five records.
Code:

E006 ........
E007 ........
E008 .........
.....
E010 ...


set upper-limit = E006, lower-limit = E010
if the user opts for page up then use this query
Code:

select * from demo_table where ecode < upper-limit;

so again display the first five records.
so u always need to store two limits.
upper-limit is used for page up.
lower-limit is used for page down.
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mmwife

Super Moderator


Joined: 30 May 2003
Posts: 1592

PostPosted: Fri Jul 16, 2004 9:21 pm
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Hi Lakshmi,

If you work in DP as a pgmr you can look at source code for CICS pgms. Most CICS systems have a browse function.

The most common CICS application system functions are:

Add
Delete
Change
Browse

They're all over the place. Just list the members in your company's CICS loadlib, then use that list to peruse the source library.

You'll probably see a common approach to the problem that you should adopt for your pgm.

Regards, Jack.
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