How to make selection screen field mandatory at runtime

[Former Member]

How to selection screen field mandatory at runtime

[Former Member]

You can use the addition 'OBLIGATORY' to make a selection screen field mandatory while declaring the same.

Eg.

PARAMETERS: p_carr TYPE spfli-carrid OBLIGATORY.

SELECT-OPTIONS : s_carr for spfli-carrid OBLIGATORY.

[Former Member]

what's the diffirent between the at seletion-screen output and obligatory.

[Former Member]

Using slection screen output enables the programmer to control the properties of screen field dynamically.

Let us say that we do not want to display a field in the screen if a particular checkbox is marked. This can be accomplished only via at slection screen output.

[Former Member]

Hi,

If you make it mandatory during runtime using

screen-required = '1'.

Then you may not be able to make it not mandatory later(If the user takes some other option).

So better try with user-command option with select-option

and give message(Status) forcing the user to enter the field.

Regards,

Bejoy

[ssimsekler]

Hi

To compile;

"OBLIGATORY" addition sets the parameter's or select-option's attribute staticaly, however it can be overwritten at

standard event 'AT SELECTION-SCREEN OUTPUT' .

Using 'AT SELECTION-SCREEN OUTPUT' event you can dynamically set selection screen field properties.

That is; it is like PBO of the selection screen. It is triggered before whenever the screen is displayed.

To change a screen field attribute, you can use 'LOOP AT SCREEN'. (no WHERE clause available)

<u><b>e.g.</b></u>

PARAMETERS p_par1 LIKE sy-datum .
....
AT SELECTION-SCREEN OUTPUT .
LOOP AT SCREEN .
  IF screen-name = 'P_PAR1' . "always use uppercase"
    screen-required = '1' .
    MODIFY SCREEN . "do not forget to commit your change with this line"
  ENDIF .
ENDLOOP .

To group some fields which will be treated similar at this manner, you can group them.

For example, the code snippet below will make <i>p_par1</i> and <i>p_par2</i> obligatory at runtime.

PARAMETERS: p_par1 LIKE sy-datum MODIF ID m01 ,
            p_par2 LIKE mara-matnr MODIF ID m01 ,
            p_par3 LIKE p0001-pernr .
AT SELECTION-SCREEN OUTPUT .
LOOP AT SCREEN .
  IF screen-group1 = 'M01' . "always use uppercase"
    screen-required = '1' .
    MODIFY SCREEN . "do not forget to commit your change with this line"
  ENDIF .
ENDLOOP .

For more information;

You can refer to Horst Keller's ABAP book, standard SAP courses and <a href="http://help.sap.com">online SAP Help</a>.

*--Serdar

[Former Member]

LOOP AT SCREEN.
CASE SCREEN-NAME.
WHEN 'FIELDNAME'.
SCREEN-REQUIRED = 'X'. " or probably '1'
ENDCASE.
MODIFY SCREEN.
ENDLOOP.

For more help, you can refer PARAMETERS --> MODIF-ID

Regards,

Subramanian V.

[Former Member]

HiKaushik,

Yes you can:

PARAMETERS:

pa_check TYPE c.

AT SELECTION-SCREEN OUTPUT.

LOOP AT SCREEN.

CASE screen-name.

WHEN 'PA_CHECK'.

screen-required = '1'.

MODIFY SCREEN.

ENDCASE.

ENDLOOP.

Regards,

John.

[athavanraja]

On selection screen output .

Loop at screen .

set the scree-required field to '1' .

modify screen.

endloop .

Regards

Raja

[Former Member]

To avoid making all the fields as mandaory it is a good practice to use screen groups for all the fields which needs to be made as mandatory and check for this group when we are looping.

Regards,

Saji.