How to do validation for screen fields?

[Former Member]

Hi All,

Pls tell how to do validation of screen fields, explain with example?

Thanks

[former_member206439]

Hi

see this sample example

the bold letters will explain you how can we validate the screen elements.

REPORT ZNNR_REPORT NO STANDARD PAGE HEADING MESSAGE-ID ZNNR LINE-SIZE 100 LINE-COUNT 65(4).

******DATA DECLARATIONS**********

DATA : BEGIN OF IT_PLANT OCCURS 0,

MATNR LIKE MARA-MATNR,

WERKS LIKE MARC-WERKS,

PSTAT LIKE MARC-PSTAT,

EKGRP LIKE MARC-EKGRP,

END OF IT_PLANT.

DATA : BEGIN OF IT_PONO OCCURS 0,

EBELN LIKE EKKO-EBELN,

EBELP LIKE EKPO-EBELP,

MATNR LIKE EKPO-MATNR,

WERKS LIKE EKPO-WERKS,

LGORT LIKE EKPO-LGORT,

END OF IT_PONO.

TABLES EKKO.

********END OF DATA DECLARATIONS*********

********SELECTION SCREEN DESIGN ***********

SELECTION-SCREEN BEGIN OF BLOCK B1 WITH FRAME TITLE TEXT-001.

PARAMETER : P_WERKS LIKE MARC-WERKS MODIF ID S1.

SELECT-OPTIONS : S_EBELN FOR EKKO-EBELN NO INTERVALS MODIF ID S2.

SELECTION-SCREEN END OF BLOCK B1.

SELECTION-SCREEN BEGIN OF BLOCK B2 WITH FRAME TITLE TEXT-004.

SELECTION-SCREEN BEGIN OF LINE.

PARAMETERS : R1 RADIOBUTTON GROUP G1 DEFAULT 'X'.

SELECTION-SCREEN COMMENT 5(20) TEXT-002 FOR FIELD R1.

SELECTION-SCREEN END OF LINE.

SELECTION-SCREEN BEGIN OF LINE.

PARAMETERS : R2 RADIOBUTTON GROUP G1.

SELECTION-SCREEN COMMENT 5(20) TEXT-003 FOR FIELD R2.

SELECTION-SCREEN END OF LINE.

SELECTION-SCREEN END OF BLOCK B2.

******END OF SELECTION SCREEN DESIGN****************

*********INITIALIZATION OF SELECTION SCREEN ELEMENTS.*****

INITIALIZATION.

P_WERKS = '1000'.

S_EBELN-LOW = '4500016926'.

S_EBELN-OPTION = 'EQ'.

S_EBELN-SIGN = 'I'.

APPEND S_EBELN.

CLEAR S_EBELN.

************END OF INITIALIZATION***********************

***********SCREEN MODIFICATIONS*******************

AT SELECTION-SCREEN OUTPUT.

LOOP AT SCREEN.

IF R1 EQ 'X' AND SCREEN-GROUP1 EQ 'S2'.

SCREEN-INPUT = 0.

MODIFY SCREEN.

ENDIF.

IF R2 EQ 'X' AND SCREEN-GROUP1 EQ 'S1'.

SCREEN-INPUT = 0.

MODIFY SCREEN.

ENDIF.

ENDLOOP.

********END OF SCREEN MODIFICATIONS*****************

****************SCREEN VALIDATIONS ******************

at selection-screen.

*SELECT SINGLE **

FROM EKKO

INTO EKKO

WHERE EBELN IN S_EBELN.

IF SY-SUBRC <> 0.

SET CURSOR FIELD 'S_EBELN-LOW'.

MESSAGE E999 WITH TEXT-005.

ENDIF.

*********end of screen validation******************

[Former Member]

Hi,

try like this...

In the screen flow logic.....

process after input.
 loop at itab.
 field itab-carrid module check on request.
 endloop.
 module user_command_0100.

in the program code..

module check input.
  data : carid like spfli-carrid.
  if not itab-carrid is initial.
    select single carrid
                  from zspfli
                  into carid
                  where carrid = itab-carrid.
    if not sy-subrc is initial.
      message 'carrid does not exist' type 'E'.
    endif.
      endif.
endmodule.                 " check  INPUT

Regards,

Satish Reddy..