ALV DISPLAY-choose layout button

Question

Hi,
i have an alv report which displays 10 fields from an internal table, now i need to add the choose layout which must include 5 fields other than the existing 10 fields and display the report, with what has been chosen.how can i do this?

Answer 1

In addtion to Rav's reply u have to do the follwoing so taht u can save the layput
The following is where a user can enter a display variant
the no display can be used if the grid output is not to
be controlled by the users variant.
PARAMETERS p_layout LIKE disvariant-variant.
DATA:     gd_layout    type slis_layout_alv.
  w_layout-grid_title = sy-title.
  w_layout-zebra      = 'X'
  w_layout-sel_mode   = 'B'.
  w_layout-cwidth_opt = 'X'
  w_variant-handle    = p_layout.
  w_variant-report    = sy-repid.
call function 'REUSE_ALV_GRID_DISPLAY'
       exporting
            i_callback_program      = gd_repid
            i_callback_top_of_page   = 'TOP-OF-PAGE'  "see FORM
            i_callback_user_command = 'USER_COMMAND'
*            i_grid_title           = outtext
            is_layout               = gd_layout
            it_fieldcat             = fieldcatalog[]
*            it_special_groups       = gd_tabgroup
            it_events               = gt_events 
            is_print                = gd_prntparams 
            i_save                  = 'X'
            is_variant = w_variant
      tables
            t_outtab                = it_ekko
       exceptions
            program_error           = 1
            others                  = 2.
  if sy-subrc <> 0.