Mandatory to selection screen field

Question

Hi experts ,
I need one help , i have on check box and one select option filed .  my requirement is  when check box is checked my  selectoption fields should be mandatory .
please let me know how to solve this issue .
Regards
Ajay pandey

Answer 1

Hi Ajay,
The following is the code that works as per your requirement:
parameters: p_flag type flag as CHECKBOX
                                                USER-COMMAND TEST.
data: lv_matnr type mara-matnr.
SELECT-OPTIONS: s_matnr for lv_matnr.
the following commented lines don't work after making the
S_MATNR_LOW as a required field once. All subsequent    * attempts to uncheck the checkbox result in SAP's
mandatory field checks that include required-field check and
it never goes to the event block AT SELECTION-SCREEN.
at SELECTION-SCREEN OUTPUT.
loop at SCREEN.
   if screen-name = 'S_MATNR-LOW'.
     if not p_flag is INITIAL.
       screen-required = '1'.
     else.
       screen-required = '0'.
     endif.
   endif.
   MODIFY SCREEN.
ENDLOOP.
+
at SELECTION-SCREEN.
  IF sy-ucomm eq 'TEST'.
    if not p_flag is INITIAL and
      s_matnr-low is INITIAL. "no need to check S_MATNR-HIGH
      MESSAGE e000(SU) with 'Enter the material.'.
    endif.
  ENDIF.
Hope this helps.
Thanks
Sanjeev