to add selected fields from internal table using RANGES

ZRANGES.abap

* prog 27

TABLES: kna1.
TYPES: BEGIN OF t_kna1,
  v_name1 LIKE kna1-name1,
  v_name2 LIKE kna1-name2,
  v_land1 LIKE kna1-land1,
  END OF t_kna1.

SKIP 2.

SELECTION-SCREEN BEGIN OF BLOCK one WITH FRAME TITLE text-002.

PARAMETERS: asc RADIOBUTTON GROUP rad USER-COMMAND radio,
            des RADIOBUTTON GROUP rad.

PARAMETERS : de AS CHECKBOX default 'X',
             gb AS CHECKBOX,
             us AS CHECKBOX.

SELECTION-SCREEN END OF BLOCK one.


DATA: int_table TYPE STANDARD TABLE OF t_kna1,
      wa_table TYPE t_kna1.


RANGES rang FOR kna1-land1.

START-OF-SELECTION.


  rang-sign = 'I'.
  rang-option = 'EQ'.

*  IF sy-subrc = 0.



    IF de = 'X'.
      rang-low = 'DE'.
      APPEND rang.
    ENDIF.

    IF gb = 'X'.
      rang-low = 'GB'.
      APPEND rang.
    ENDIF.

    IF us = 'X'.
      rang-low = 'US'.
      APPEND rang.
    ENDIF.
*
*  ELSE.
*    MESSAGE 'invalid check option' TYPE 'E'.
*  ENDIF.

  SELECT name1 name2 land1 FROM kna1 INTO TABLE int_table where land1 in rang.



*  RADIOBUTTON CONDITION CHECK
  IF asc = 'X'.
    SORT int_table BY v_land1 ASCENDING.
  ELSE.
    SORT int_table BY v_land1 DESCENDING.
  ENDIF.


  LOOP AT int_table INTO wa_table.
    WRITE:/ wa_table-v_name1 ,wa_table-v_name2 ,wa_table-v_land1.
  ENDLOOP.


END-OF-SELECTION.