Call Selection Screen

[Former Member]

Hi,

can any one give me good links for

All variants of at selection screen..

some thing on call selection screen

Thx,

Shashi

[Former Member]

· AT SELECTION-SCREEN

You should only perform very expensive checks with AT SELECTION-SCREEN if the program is then started. Here, you can read the system field SSCRFIELDS-UCOMM (provided a statement TABLES SSCRFIELDS exists). If the field has one of the values 'ONLI' (= Execute) or 'PRIN' (= Execute and Print), the report is then started, i.e. the selection screen is closed and the processing continues with START-OF-SELECTION.

Additions:

· ... ON psel

Effect

This event is assigned to the selection screen fields corresponding to the report parameter or selection criterion psel.

If the report starts an error dialog at this point, precisely these fields become ready for input.

· ... ON END OF sel

·

For each selection criterion sel on the selection screen, you can call a further screen by pressing a pushbutton. On this screen, you can enter any number of single values and ranges for the selection criterion sel..

When this screen has been processed (i.e. at the end of PAI for this screen), the event AT SELECTION-SCREEN ON END OF sel is executed.

At this point, all the values entered are available in the internal table sel.

· ... ON VALUE-REQUEST FOR psel_low_high

Effect

In this addition, the field psel_low_high is either the name of a report parameter or of the form sel-LOW or sel-HIGH, where sel is the name of a selection criterion. The effect of this is twofold:

1. The possible entries pushbutton for F4 appears beside the appropriate field.

2. When the user activates this pushbutton or presses F4 for the field, the event is executed. You can thus implement a self-programmed possible entries routine for the input/output fields of the selection screen. If the program contains such an event and the user presses F4, the system processes this rather than displaying the check table or the fixed values of the Dictionary field.

· ... ON HELP-REQUEST FOR psel_low_high

Effect

As with the addition ON VALUE-REQUEST the field psel_low_high is either the name of a report parameter or of the form sel-LOW or sel-HIGH, where sel is the name of a selection criterion. When the user presses F1 on the relevant field, the subsequent processing block is executed. You can thus implement a self-programmed help for the input/output fields of the selection screen. If the program contains such an event and the user presses F1, the system processes this rather than displaying the documentation of the Dictionary field - even if the report parameter or the selection option with LIKE or FOR points to a Dictionary field.

· ... ON RADIOBUTTON GROUP radi

Effect

This event is assigned to the radio button groups on the selection screen defined by PARAMETERS par RADIOBUTTON GROUP radi. If the report starts at an error dialog at this point ,precisely these fields of the radio button group

radi become ready for input again.

· ... ON BLOCK block

Effect

This event is assigned to the blocks on the selection screen defined by SELECTION-SCREEN BEGIN/END OF BLOCK block. If the report starts at an error

dialog at this point, precisely these fields of the block block become ready for input again.

The events assigned to the radio button groups are executed according to the first parameter of the radio button group.

The events assigned to the blocks are executed "from the inside to the outside".

· ... OUTPUT

Effect

This event is executed at PBO of the selection screen every time the user presses ENTER - in contrast to INITIALIZATION. Therefore, this event is not suitable for setting selection screen default values. Also, since AT SELECTION-SCREEN OUTPUT is first executed after the variant is imported (if a variant is used) and after adopting any values specified under SUBMIT in the WITH clause, changing the report parameters or the selection options in AT SELECTION-SCREEN OUTPUT would destroy the specified values. Here, however, you can use LOOP AT SCREEN or MODIFY SCREEN to change the inout/output attributes of selection screen fields.

· ... ON EXIT-COMMAND

Effect

This event is executed at the exit command of the selection screen - that is, at Back, Cancel, or End,events executed after the screen is sent that do not cause the system to check the input and execute the PAI.

plz reward if useful

vivek

[Former Member]

hi,

the best linkl is

http://help.sap.com/saphelp_nw04s/helpdata/en/9f/dba66935c111d1829f0000e829fbfe/frameset.htm

[Former Member]

hi ,

Check this...

AT SELECTION-SCREEN

You should only perform very expensive checks with AT SELECTION-SCREEN if the program is then started. Here, you can read the system field SSCRFIELDS-UCOMM (provided a statement TABLES SSCRFIELDS exists). If the field has one of the values 'ONLI' (= Execute) or 'PRIN' (= Execute and Print), the report is then started, i.e. the selection screen is closed and the processing continues with START-OF-SELECTION.

Additions:

· ... ON psel

Effect

This event is assigned to the selection screen fields corresponding to the report parameter or selection criterion psel.

If the report starts an error dialog at this point, precisely these fields become ready for input.

· ... ON END OF sel

·

For each selection criterion sel on the selection screen, you can call a further screen by pressing a pushbutton. On this screen, you can enter any number of single values and ranges for the selection criterion sel..

When this screen has been processed (i.e. at the end of PAI for this screen), the event AT SELECTION-SCREEN ON END OF sel is executed.

At this point, all the values entered are available in the internal table sel.

· ... ON VALUE-REQUEST FOR psel_low_high

Effect

In this addition, the field psel_low_high is either the name of a report parameter or of the form sel-LOW or sel-HIGH, where sel is the name of a selection criterion. The effect of this is twofold:

1. The possible entries pushbutton for F4 appears beside the appropriate field.

2. When the user activates this pushbutton or presses F4 for the field, the event is executed. You can thus implement a self-programmed possible entries routine for the input/output fields of the selection screen. If the program contains such an event and the user presses F4, the system processes this rather than displaying the check table or the fixed values of the Dictionary field.

· ... ON HELP-REQUEST FOR psel_low_high

Effect

As with the addition ON VALUE-REQUEST the field psel_low_high is either the name of a report parameter or of the form sel-LOW or sel-HIGH, where sel is the name of a selection criterion. When the user presses F1 on the relevant field, the subsequent processing block is executed. You can thus implement a self-programmed help for the input/output fields of the selection screen. If the program contains such an event and the user presses F1, the system processes this rather than displaying the documentation of the Dictionary field - even if the report parameter or the selection option with LIKE or FOR points to a Dictionary field.

· ... ON RADIOBUTTON GROUP radi

Effect

This event is assigned to the radio button groups on the selection screen defined by PARAMETERS par RADIOBUTTON GROUP radi. If the report starts at an error dialog at this point ,precisely these fields of the radio button group

radi become ready for input again.

· ... ON BLOCK block

Effect

This event is assigned to the blocks on the selection screen defined by SELECTION-SCREEN BEGIN/END OF BLOCK block. If the report starts at an error

dialog at this point, precisely these fields of the block block become ready for input again.

The events assigned to the radio button groups are executed according to the first parameter of the radio button group.

The events assigned to the blocks are executed "from the inside to the outside".

· ... OUTPUT

Effect

This event is executed at PBO of the selection screen every time the user presses ENTER - in contrast to INITIALIZATION. Therefore, this event is not suitable for setting selection screen default values. Also, since AT SELECTION-SCREEN OUTPUT is first executed after the variant is imported (if a variant is used) and after adopting any values specified under SUBMIT in the WITH clause, changing the report parameters or the selection options in AT SELECTION-SCREEN OUTPUT would destroy the specified values. Here, however, you can use LOOP AT SCREEN or MODIFY SCREEN to change the inout/output attributes of selection screen fields.

· ... ON EXIT-COMMAND

Effect

This event is executed at the exit command of the selection screen - that is, at Back, Cancel, or End,events executed after the screen is sent that do not cause the system to check the input and execute the PAI.

Reward if helpful,

Gaurav J.

[Former Member]

Hi

Selection-screens are special screen defined in ABAP.

- This ABAP at run time only controls the flow logic of Selection-screens. The PBO and PAI triggers the num of. selection-screens.

The basic form of the selection screen events is the AT SELECTION-SCREEN event. This event occurs after the runtime environment has passed all input data from the selection screen to the ABAP program. The other selection screen events allow programmers to modify the selection screen before it is sent and specifically check user input.

At Selection-screen OUTPUT is trigerred in PBO of selection-screen.

- This allows you to modify the Selection-screen, before it is displayed.

At Selection-screen On Field is triggered in PAI of selection-screens.

- The input fields can b checked,in the corresponding event block. If an error message occurs within this event block, the corresponding field is made ready for input again on the selection screen.

At Selection-screen On Block is trigerred in PAI event.

- You define a block by enclosing the declarations of the elements in the block between the statements SELECTION-SCREEN BEGIN OF BLOCK block - END OF BLOCK block. You can use this event block to check the consistency of the input fields in the block.

At Selection-screen On value request.

- This event is trigerred for F4 help.

At Selection-screen On help request .

- This event is triggered when the user clicks F1 for help on fileds.