screen-required in screen programming

[Former Member]

I wrote the following PBO:

LOOP AT SCREEN.

IF screen-name = 'field1'.

screen-required = '1'. "set as mandatory

ENDIF.

MODIFY SCREEN.

ENDLOOP.

Will this automatically return error if it's left empty when it is executed?

Or I have to write the following in PAI:

IF field1 IS INITIAL.

MESSAGE e020.

[Former Member]

Hi,

You just need to add it in the PBO. Nothing needs to be added in the PAI.

[Former Member]

You have to write it in PBO.

LOOP AT SCREEN.

IF screen-name = 'field1'.

screen-required = '1'. "set as mandatory

ENDIF.

MODIFY SCREEN.

ENDLOOP.

IF field1 IS INITIAL.

MESSAGE e020.

ENDIF.

[Former Member]

I added the LOOP AT SCREEN part on PBO. I haven't really do anything in PAI yet. But when I execute the screen, there's no response. Anything I need to put in PAI in order to test that out? If I need to put that part of

IF field1 IS INITIAL.
  message e021.

I do not see why I need to put that screen-required = 1 at PBO.

[sridhar_meesala]

Hi,

If you want to check the mandatory-check on some button click, then you have too write in PAI as

CASE sy-ucomm.
 WHEN 'F_BUTTON'.
  IF field1 IS INITIAL.
   message e021.
  ENDIF.
ENDCASE

Thanks,

Sri.

[Former Member]

Hi Sri,

In that case, do I still need to write screen-required = '1' at PBO?

[sridhar_meesala]

>

> Hi Sri,
> 
> In that case, do I still need to write screen-required = '1' at PBO?

Hi,

No need to write it in PBO again.

Thanks,

Sri.

[Former Member]

Hi, I solved my problem by setting 'required' at screen painter. With this, I do not need to write any codes in PBO nor PAI.