How to delete a row in table control(accepts only input)?

Question

Hi All,
I have an empty table control which is only use for data input(this data will then be use to store information to a custom table). I have two buttons, Create Entry and Delete Entry.
In my screenPainter for the table control, I have the checkbox w/SelColumn ticked and assign variable T_DATA-MARK on it.
Please see the actual screenshots and code below:
The aim of the table control is just to accept inputs, so the internal table in the PBO is always empty.
Table Control Screen Painter ScreenShot and Actual SAP Output:
http://img710.imageshack.us/img710/4751/tablecontrolrowdelete.jpg
PBO
PROCESS BEFORE OUTPUT.
  LOOP WITH CONTROL TC_ID.
    MODULE LOAD_TABLECTRL.
  ENDLOOP.
module LOAD_TABLECTRL output.
  READ TABLE T_ID_CHECK INTO WA_ID_CHECK INDEX TC_ID-current_line.
  IF SY-SUBRC EQ 0.
    MOVE-CORRESPONDING T_ID_CHECK TO TC_ID.
  ELSE.
      "EXIT FROM STEP-LOOP.
      CLEAR ZQID_CHECK.
  ENDIF.
PAI
PROCESS AFTER INPUT.
   LOOP WITH CONTROL TC_ID.
     CHAIN.
      MODULE CHECK_ENTRIES     ON CHAIN-INPUT.     
      MODULE MODIFY_T_ID_CHECK ON CHAIN-INPUT.
      MODULE DELETE_ROW        ON CHAIN-INPUT
     ENDCHAIN.
   ENDLOOP.
module CHECK_ENTRIES input.
  CASE ok_code.
    WHEN 'DEL'.
        PERFORM F_FILL_ITABCREATE USING ZQID_CHECK-MATNR
                                        ZQID_CHECK-LICHA
                                        ZQID_CHECK-LIFNR.
  ENDCASE.
endmodule.    
form F_FILL_ITABCREATE  using    us_zqid_check_matnr LIKE MARA-MATNR
                                 us_zqid_check_licha LIKE MCHA-LICHA
                                 us_zqid_check_lifnr LIKE LFA1-LIFNR.
  MOVE: us_zqid_check_matnr TO WA_ID_CHECK-MATNR,
        us_zqid_check_licha TO WA_ID_CHECK-LICHA,
        us_zqid_check_lifnr TO WA_ID_CHECK-LIFNR.
  APPEND WA_ID_CHECK TO T_ID_CHECK.
  CLEAR WA_ID_CHECK.
endform.
module MODIFY_T_ID_CHECK input.
DATA W_TEMPMARK(1) TYPE C.
  MOVE: T_ID_CHECK-MARK TO W_TEMPMARK,
        W_TEMPMARK TO T_ID_CHECK-MARK.
MODIFY T_ID_CHECK INDEX SY-TABIX TRANSPORTING MARK.
endmodule.
module DELETE_ROW input.
  LOOP AT T_ID_CHECK WHERE MARK EQ 'X'.
    DELETE T_ID_CHECK.
  ENDLOOP.
endmodule.   
Edited by: Jaime Cabanban on Jan 7, 2010 8:46 PM

Answer 1

Debugging the PBO part after deletion will help you know why the rows are getting deleted
This is the sap doc answer for you question regarding LINE.
Controls the scroll bar of the table control. At LOOP without internal table, LINES has the initial value zero and must be set in the program so that the scroll bar can be used. At LOOP AT <itab> the system sets this component to the number of rows of the internal table, whenever the table control is processed for the first time. The initialization event of a table control is not determined uniquely. If the corresponding internal table is not fully created at this event, then the LINES variable receives an incorrect value. If LINES in the LOOP loop is smaller as the number of rows of the internal table, then the table control contains blank rows at the end.
Therefore you should always set the LINES component explicitly in the ABAP program, including at LOOP AT <itab>. In this way you have full control over the dimensions of the vertical scroll bar and so can control the number of rows that are ready for input. Initialization should usually occur at PBO directly before the LOOP statement for the table control.