Answer / mohan

If the validation has to be done for more than one field the
those fields are included between chanin and endchain.

Answer / arya

Apart from doing multiple validation one thing u should
know about CHAIN ENDCHAIN statement is that they are
special key words which are processed by screen processor
not by abap processor and there is a separate flow logic
for them known as screen flow logic.

Answer / manoj kumar

chain and end chain are used for multipe validation on
module pool programing and for saingl we use the below
syntax feild feild feild name module module name

Answer / saurabh shrivastava

If the validation has to be done for more than one field the
those fields are included between chanin and endchain.
Ex
In PAI if you want to validate group of fields put in
chain and End chain statement .


You can declare fields in the chain enchain .


CHAIN.
FIELD chk_ABC.
FIELD chk_DEF.
FIELD chk_GHI.
FIELD CHK-JKL.
MODULE CHK_screenfields.
ENDCHAIN.


MODULE CHK_screenfields INPUT.
CLEAR okcode.
okcode = sy-ucomm.
CASE okcode.
WHEN 'ENTER' OR 'EXECUTE'.

IF chk_ABC IS INITIAL AND chk_DEF IS INITIAL AND CHK_GHI
IS INITIAL .
MESSAGE e000(zo_spa) WITH text-017. " Enter VALUES'
ELSE.
.....
ENDIF.
ENDIF.

ENDMODULE. " modify_screenfields INPUT

Answer / vikas

CHAIN and ENDCHAIN are use to apply validation an multipal
feild.if we have to validate only single field we will use
field but for using validation on multipul field use CHAIN
and ENDCHAIN.

Answer / prabha

mostly chain.....end chain are using in dialog programming.

if i am having table control in my module pool programming
there we are having multiple lines to validate...........

so in that situation mainly we are using chain....endchain
concept in PAI.

the use of chain.....endchain is " muliple field input checks".

hope it will help you.

Answer / ravi

@ Answer 2 : it is not clear.
Any one, Pls modify it, if possible

Answer / kkkreddy

CHAIN....ENDCHAIN is used to validate more than one field (or)
Multiple fields in MODULEPOOL PROGRAMS......

Answer / hafeez

We can validate without chain endchain also but the thing is to avoid editable mode to input fields.
If I have 5 fields at input level if one of the field entered is error then renaming fields turn to edible mode to avoid this we are using chai endchain

Answer / bongoni vikram

it is not answer of that , i have small doubt on this !
why we use chain and endchain keyword ( i know for multiple validations not for that my quation) . if we can use below statement for moultiple validations .

filed : filed1 , filed2 , filed3 module xxxx .

other than this statement why we use chain and end chain keyword .

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