F4 para seleccionar archivo ABAP (F4 for filename )

PARAMETERS: pa_file type LOCALFILE.

Proceso:

at selection-screen on value-request for pa_file.
*----------------------------------------------------------------------
  perform get_file_name using 'Filename to download to'(011)
    changing pa_file.

Rutina:

*----------------------------------------------------------------------
*  Form  get_file_name
*----------------------------------------------------------------------
*  F4 help for file name
*----------------------------------------------------------------------
form get_file_name using lo_text
                   changing lo_file.

  data: lt_files type standard table of sdokpath,
        lw_file type sdokpath.

  call function 'TMP_GUI_FILE_OPEN_DIALOG'
       EXPORTING
            window_title = lo_text
       TABLES
            file_table   = lt_files
       EXCEPTIONS
            others       = 4.
  if sy-subrc = 4.
    message 'GUI error: please contact the helpdesk' type 'E'. 
  endif.

  read table lt_files index 1 into lw_file.
  lo_file = lw_file-pathname.

endform.                    " get_file_name

Alternativa

Class CL_RSAN_UT_FILES method F4 :

AT SELECTION-SCREEN ON VALUE-REQUEST FOR pa_mfile.
  CL_RSAN_UT_FILES=>F4(
    exporting i_applserv = space
              i_gui_extension = space
              i_gui_ext_filter = space
              i_title = 'Choose file to UPLOAD from'
    changing  c_file_name = pa_mfile ).

Para buscar directorio --> TMP_GUI_BROWSE_FOR_FOLDER.

Fuente:

http://abapcadabra.com/index.php/reporting/the-selection-screen/147-selscreen-f4-filename

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