ALV Variant fields

Question

Wassup !
A need to create a file in same as time as a display an ALV. In selection screen there is a field that the user can load a variant. I need to create the file with the same fields displayed in ALV, How can I discover witch fields will appear in screen.
There is a table for that ?
A FM ?
Thx all.
Point will be rewards. !!

Answer 1

Wassup ...
I hope the following code helps ...
{    variante-report  = sy-repid.
     variante-variant = p_vari.
     layout-colwidth_optimize = 'X'.
     layout-zebra  = 'X'.
   IF NOT p_vari IS INITIAL.
     CALL FUNCTION 'REUSE_ALV_VARIANT_SELECT'
       EXPORTING
         i_dialog                 = ' '
         it_default_fieldcat      = t_fieldcat
         i_layout                 = layout
      IMPORTING
        ET_FIELDCAT               = t_fieldcat
      CHANGING
         cs_variant               = variante
      EXCEPTIONS
        WRONG_INPUT               = 1
        FC_NOT_COMPLETE           = 2
        NOT_FOUND                 = 3
        PROGRAM_ERROR             = 4
        OTHERS                    = 5.
   ELSE.
     LOOP AT t_fieldcat assigning <fs_fieldcat>.
          CLEAR: <fs_fieldcat>-no_out.
     ENDLOOP.
  ENDIF.
     CALL FUNCTION 'GET_COMPONENT_LIST'
     EXPORTING
       program          = sy-repid
       fieldname        = 'T_LISTA'
     tables
       components       = tl_comp.
  CLEAR: vl_file.
First u get the variant with 'REUSE_ALV_VARIANT_SELECT. After that u discovery with fields will be shown with that variant.