At selection screen

[Former Member]

Hi all,

Out of these Two events which one triggers First ?

AT SELECTION SCREEN and AT SELECTION SCREEN OUTPUT

Thanks in advance

Mahesh...

[former_member188829]

Hi,

At Selection-screen output.

[Former Member]

Hi,

At selection screen output will trigger first.

Thanks,

Sriram Ponna.

[Former Member]

Hi KR,

The difference between both the events is given below:

AT SELECTION-SCREEN

This event is processed before leaving the Selection Screen i.e. when the selection screen has been processed (at the end of PAI once the ABAP runtime environment has passed all the input data from selection screen to the ABAP program).

This event is used to validate the input provided through selection screen. If an error message occurs in this processing block, the selection screen is redisplayed with all of its fields ready for input. This allows you to check input values for consistency.

AT SELECTION-SCREEN OUTPUT

This event gets triggered for the first time when the screen is building up and the screen is about to appear. It gets triggered again and again for every dialog step/the selection screen is refreshed/ enter key is pressed.

This event is to control the display of the screen at runtime. lilke hiding the fields, making the fields Active/Inactive, to modify the field attributes. It is a PBO Event.

<b>Kindly reward points if you found the reply helpful.</b>

Cheers,

Chaitanya.

[Former Member]

Hi KR,

The difference between both the events is given below:

AT SELECTION-SCREEN

This event is processed before leaving the Selection Screen i.e. when the selection screen has been processed (at the end of PAI once the ABAP runtime environment has passed all the input data from selection screen to the ABAP program).

This event is used to validate the input provided through selection screen. If an error message occurs in this processing block, the selection screen is redisplayed with all of its fields ready for input. This allows you to check input values for consistency.

AT SELECTION-SCREEN OUTPUT

This event gets triggered for the first time when the screen is building up and the screen is about to appear. It gets triggered again and again for every dialog step/the selection screen is refreshed/ enter key is pressed.

This event is to control the display of the screen at runtime. lilke hiding the fields, making the fields Active/Inactive, to modify the field attributes. It is a PBO Event.

<b>Kindly reward points if you found the reply helpful.</b>

Cheers,

Chaitanya.

[franciscojavier_carrillom]

You have to see it like a dynpro. So you have a PBO (AT SELECTION-SCREEN OTPUT) and you PAI (AT SELECTION SCREEN), so the PBO is triggered before you push or execute anything, and then is triggered the PAI. so the at selection screen output is triggered before.

I don´t know if i explained it as well as i wanted, but i hope help you.

[Former Member]

Hi

AT SELECTION-SCREEN OUTPUT will trigger 1st

because it almost acts like an INITIALIZATION event

this event is used for screen modifications

when ever you click on execute button INITIALIZATION event triggers at the SAME TIME AT SELECTION-SCREEN OUTPUT also triggers once and latter on the screen when ever you do some modifications this event will trigers

AT SELECTION-SCREN event triggers only when you do some action on the selection screen

see this program

&----

---

*& Report ZNNR_REPORT

*&

&----

---

*&

*&

&----

---

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*****************

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.