Clear Input Field

Question

I need to clear the input field on the screen, if the input by the user is invalid. This is a generic code and need to be used in many screens. I would not really like to hard code the field names in the code to clear the input field (in the PAI event of the screen). Is there a way to use SCREEN-NAME variable to clear the input field dynamically whose name is stored in SCREEN-NAME variable?
Any help would be highly regarded !!!!

Answer 1

Hi Nikhil,
see this report
select second radiobutton and press on enter ,
enter some values in the PO number and press enter it will show you the error message and it wil clear the values also
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.
clear S_ebeln-low.
ENDIF.
********end of screen validation*****************
START-OF-SELECTION.
*set pf-status '100'.
IF R1 EQ 'X'.
SELECT MATNR
WERKS
PSTAT
EKGRP
FROM MARC
INTO TABLE IT_PLANT
WHERE WERKS = P_WERKS.
LOOP AT IT_PLANT.
WRITE : SY-VLINE , 2 IT_PLANT-MATNR COLOR COL_KEY,
21 SY-VLINE , 22 IT_PLANT-WERKS COLOR COL_KEY,
27 SY-VLINE ,28 IT_PLANT-PSTAT COLOR COL_NORMAL,
43 SY-VLINE ,44 IT_PLANT-EKGRP COLOR COL_NORMAL.
ENDLOOP.
ENDIF.
IF R2 EQ 'X'.
SELECT EBELN EBELP MATNR WERKS LGORT
FROM EKPO
INTO TABLE IT_PONO
WHERE EBELN IN S_EBELN.
LOOP AT IT_PONO.
WRITE : SY-VLINE , 2 IT_PONO-EBELN COLOR COL_KEY,
12 SY-VLINE , 13 IT_PONO-EBELP COLOR COL_KEY,
18 SY-VLINE , 19 IT_PONO-MATNR COLOR COL_NORMAL,
37 SY-VLINE , 38 IT_PONO-WERKS COLOR COL_NORMAL,
44 SY-VLINE , 45 IT_PONO-LGORT COLOR COL_NORMAL, 49 SY-VLINE..
ENDLOOP.
ENDIF.
TOP-OF-PAGE.
IF R1 EQ 'X'.
*ULINE AT /1(48).
WRITE : SY-VLINE ,2 'MATERIAL NUMBER',
21 SY-VLINE , 22 'PLANT',
27 SY-VLINE , 28 'STATUS',
43 SY-VLINE , 44 'GRUP', 48 SY-VLINE.
ULINE AT /1(48).
ENDIF.
IF R2 EQ 'X'.
WRITE : SY-VLINE , 2 'PO NUMBER',
12 SY-VLINE, 13 'ITEM',
18 SY-VLINE,19 'MATERIAL NUMBER',
37 SY-VLINE, 38 'PLANT',
44 SY-VLINE, 45 'GRUP',
49 SY-VLINE.
ULINE AT /1(50).
ENDIF.
END-OF-PAGE.
ULINE AT /1(50).
WRITE :/10 'PAGE NUMBER', SY-PAGNO.
kindly reward if helpful.
cheers,
Hema.