At selection-screen on end of

Question

hi to all pls tellabt the event at selection-screen on end of  and at selection-on block
plsa give some sample coding on theese  points will be rewarded

Answer 1

Hi
You are mixing up the things
You need to know separately about At selection-screen and its events
selection-screen : begin of block b1 with frame title text-001.
select-options:s_bukrs for t001-bukrs no intervals no-extension
                                                     obligatory,
               s_vkorg for tvko-vkorg no intervals no-extension,
               s_vtweg for tvtw-vtweg no intervals no-extension,
               s_spart for tspa-spart no intervals no-extension,
               s_werks for t001w-werks no intervals no-extension,
               s_kunag for kna1-kunnr,
               s_vbeln for vbuk-vbeln,
               s_fkart for tvfk-fkart,
               s_fkdat for vbrk-fkdat obligatory.
selection-screen begin of line.
selection-screen comment 1(20) text-008.
selection-screen end   of line.
selection-screen begin of line.
parameters p_cust type c radiobutton group cust.
selection-screen comment 3(20) text-004 for field p_cust.
selection-screen end of line.
selection-screen begin of line.
parameters p_mode type c radiobutton group cust.
selection-screen comment 3(20) text-006 for field p_mode.
selection-screen end of line.
selection-screen begin of line.
parameters p_dens type c radiobutton group cust.
selection-screen comment 3(20) text-007 for field p_dens.
selection-screen end of line.
selection-screen: end of block b1.
And the Events related to Internal table like AT NEW and AT END OF
All this AT NEW, AT FIRST, AT END OF and AT LAST are called control break statements of Internal tables and are used to calculate the TOTALS based on sertain key fields in that internal table
FIrst to use these statements the ITAB has to be sorted by the key fields on whcih you need the SUM of the fields.
Some time you will get * when mopving data from this int table to other table using these commands
so you have to use
READ TABLE ITAB INDEX SY-TABIX in AT..ENDAT..if you are using other fields between them
DATA: sflight_tab TYPE SORTED TABLE OF sflight
                  WITH UNIQUE KEY carrid connid fldate,
      sflight_wa  LIKE LINE OF sflight_tab.
SELECT *
       FROM sflight
       INTO TABLE sflight_tab.
LOOP AT sflight_tab INTO sflight_wa.
  AT NEW connid.
    WRITE: / sflight_wa-carrid,
             sflight_wa-connid.
    ULINE.
  ENDAT.
  WRITE: / sflight_wa-fldate,
           sflight_wa-seatsocc.
  AT END OF connid.
    SUM.
    ULINE.
    WRITE: / 'Sum',
              sflight_wa-seatsocc UNDER sflight_wa-seatsocc.
    SKIP.
  ENDAT.
  AT END OF carrid.
    SUM.
    ULINE.
    WRITE: / 'Carrier Sum',
              sflight_wa-seatsocc UNDER sflight_wa-seatsocc.
    NEW-PAGE.
  ENDAT.
  AT LAST.
    SUM.
    WRITE: / 'Overall Sum',
              sflight_wa-seatsocc UNDER sflight_wa-seatsocc.
  ENDAT.
ENDLOOP.
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Anji