Selection Screen field validation

[Former Member]

Hello there ABAP'ers.

I have got a question haw to validate selection screen field.

In the selection-screen I have got two fields:

F_DATAELEMENT (Type: FIELDNAME)  
F_VALUE       (Type: CHAR60)

I have got a SearchHelp attached to the F_DATAELEMENT. SHelp list shows list of ADRC table fields. I obtain it using module

  CALL FUNCTION 'DDIF_FIELDINFO_GET'
      EXPORTING
        tabname        = 'ADRC'
      TABLES
        dfies_tab      = it_dfies
      EXCEPTIONS
        not_found      = 1
        internal_error = 2
        OTHERS         = 3 .

where it_dfies contains detailed information about fields (datatype, control table ...)

And now my question is it possible to validate the selection screen field F_VALUE with data taken from DDIF_FIELDINFO_GET FModue?

I mean such example:

User choses a CITY_CODE value in F_DATAELEMENT field

Now I would like the F_VALUE field to be validated respecting the ADRCITY control table (CITY_CODE has got a ADRCITY control table assigned - such info I am getting from the DDIF_FIELDINFO_GET FModule)

I will be thankful for suggestions.

Greetings,

P.

[former_member1245113]

Hi Piotr,

After passing a Value to F_VAL, now you have the Control Table which is Top most in the Heirarchy which must have the data then only other Child tables can have a relavent Value. You are obsolutely correct.

Select Single from the Control Table will work for you.

Hence you can Validate the Entry of the F_VAL field.

For Ex.

I passed SPFLI to the FM and got the data and found SCARR as the control table for CARRID field.
now if i pass 'XX' into  F_VAL  field this can be validated against the table SCARR.


data ; var type spflic-carrid " declare this 
data : str type string.
at selection-screen. " Use this Event
select single carrid from SCARR into var where carrid = f_val.
if sy-subrc NE 0.
concatenate 'Air Line ID' f_val 'Not maintained in Control Table' into str separated by space.
MESSAGE str type 'E'
endif.

Cheerz

Ram

[Former Member]

Thank you Ramchander Krishnamraju it is solving my problem but I would like to take an opportunity to continue the topic

What if I would like to validate field regarding its format?

For example ADRC table contains DATE_TO field which lies in DATUM domain.

So now how to check when User choses a DATE_TO value in F_DATAELEMENT field if F_VALUE is of a proper format? I mean situation that user enters a string value into F_VALUE field - such situation should not be permitted.

Is there some FModule or other convenience? Or do I must to check it manually by investigating the F_VALUE field string content?

Regards,

P.

[Former Member]

use the below FM for date validation

SFCS_FA_PARAMETER_SET

Edited by: subas Bose on Feb 26, 2010 11:42 PM

[former_member1245113]

Hi,

Use DESCRIBE key word which give you back the data type of the field

DATA : matnr TYPE matnr,
      date TYPE sy-datum.
DATA : type1, type2.
DESCRIBE FIELD matnr TYPE type1.
DESCRIBE FIELD date TYPE type2.

"Take F1 help which give the actual meaning returned by the type1 in above code.
for Ex if type1 = C then it is Char type or Basic ABAP data type C
if type1 = D then it is Elementary type D Etc.
This info is in Key word Documentation Take F1 Help on DESCRIBE FIELD key word
IF sy-subrc =  0.

ENDIF.

Cheerz

Ram