Generating a internal table based on the fieldcatalog

Question

hi,
i want to generate an internal table based on field catalog which will be generated after the user has selected a particular layout.
For eg. Suppose there are at present 25 fields at the ALV output and out of which user selects 10 fields using layout option and i save the layout.
Now i want an internal table with these 10 fields in my internal table not all the 25 fields.
any ideas?
regards
jignesh.

Answer 1

Hi,
Look at the sample code below.
FIELD-SYMBOLS: <outtab> TYPE ANY TABLE,
      <l_line>  TYPE ANY,
      <l_field> TYPE ANY.
DATA: new_table TYPE REF TO data.
DATA: new_line  TYPE REF TO data.
DATA: it_fieldcat TYPE lvc_t_fcat.
DATA: wa_fieldcat TYPE lvc_s_fcat.
DATA: BEGIN OF itab OCCURS 0,
      matnr TYPE matnr,
      aenam TYPE aenam,
      END OF itab.
"Fill the fieldcat here
"For example say it contains two fields MATNR AENAM
CALL METHOD cl_alv_table_create=>create_dynamic_table
        EXPORTING
          it_fieldcatalog = it_fieldcat
        IMPORTING
          ep_table        = new_table.
ASSIGN new_table->* TO <outtab>. "This is the required table
CREATE DATA new_line LIKE LINE OF <outtab>.
ASSIGN new_line->* TO <l_line> . "Work area forthe same
SELECT matnr aenam UP TO 5 ROWS
FROM mara
INTO TABLE itab.
LOOP AT itab.
  ASSIGN COMPONENT 'MATNR' OF STRUCTURE <l_line> TO <l_field>.
  <l_field> = itab-matnr.
  ASSIGN COMPONENT 'AENAM' OF STRUCTURE <l_line> TO <l_field>.
  <l_field> = itab-aenam.
  INSERT <l_line> INTO TABLE <outtab>.
ENDLOOP.
LOOP AT <outtab> ASSIGNING <l_line>.
  WRITE: / <l_line>.
ENDLOOP.
Regards,
Manoj Kumar P