An SAP Consultant

REPORT ztest_download.
"&-------------------------------------------------------------*
"& Declarations
"&-------------------------------------------------------------*
TYPES: BEGIN OF ty_pa0001,
        pernr TYPE pa0001-pernr,
        bukrs TYPE pa0001-bukrs,
        werks TYPE pa0001-werks,
        persg TYPE pa0001-persg,
        ename TYPE pa0001-ename,
      END OF ty_pa0001.
DATA:it_pa0001    TYPE STANDARD TABLE OF ty_pa0001.
DATA:wa_pa0001    TYPE ty_pa0001.
DATA:it_filetable TYPE filetable.
DATA ls_filetable LIKE LINE OF it_filetable.
DATA gv_rc        TYPE i.
"&-------------------------------------------------------------*
"& Selection-screen
"&-------------------------------------------------------------*
PARAMETERS:
    p_file TYPE string.

"&-------------------------------------------------------------*
"& At Selection-Screen
"&-------------------------------------------------------------*

AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_file.

  CALL METHOD cl_gui_frontend_services=>file_open_dialog
    EXPORTING
      window_title            = 'Open file'
*    default_extension       =
*    default_filename        =
*    file_filter             =
*    with_encoding           =
*    initial_directory       =
*    multiselection          =
    CHANGING
      file_table              = it_filetable
      rc                      = gv_rc
*    user_action             =
*    file_encoding           =
*  EXCEPTIONS
*    file_open_dialog_failed = 1
*    cntl_error              = 2
*    error_no_gui            = 3
*    not_supported_by_gui    = 4
*    others                  = 5
          .
  IF sy-subrc <> 0.
* Implement suitable error handling here
  ELSE.
    READ TABLE it_filetable INTO ls_filetable INDEX 1.
    p_file = ls_filetable-filename.
  ENDIF.

  "&-------------------------------------------------------------*
  "& Start Of selection
  "&-------------------------------------------------------------*
START-OF-SELECTION.

  CALL METHOD cl_gui_frontend_services=>gui_upload
    EXPORTING
      filename                = p_file
      filetype                = 'ASC'
      has_field_separator     = 'X'
*    header_length           = 0
*    read_by_line            = 'X'
*    dat_mode                = SPACE
*    codepage                = SPACE
*    ignore_cerr             = ABAP_TRUE
*    replacement             = '#'
*    virus_scan_profile      =
*    isdownload              = SPACE
*  IMPORTING
*    filelength              =
*    header                  =
    CHANGING
      data_tab                = it_pa0001
*    isscanperformed         = SPACE
    EXCEPTIONS
      file_open_error         = 1
      file_read_error         = 2
      no_batch                = 3
      gui_refuse_filetransfer = 4
      invalid_type            = 5
      no_authority            = 6
      unknown_error           = 7
      bad_data_format         = 8
      header_not_allowed      = 9
      separator_not_allowed   = 10
      header_too_long         = 11
      unknown_dp_error        = 12
      access_denied           = 13
      dp_out_of_memory        = 14
      disk_full               = 15
      dp_timeout              = 16
      not_supported_by_gui    = 17
      error_no_gui            = 18
      OTHERS                  = 19
          .
  IF sy-subrc <> 0.
* Implement suitable error handling here
  ELSE.
    LOOP AT it_pa0001 INTO wa_pa0001.
      WRITE:/ wa_pa0001.
    ENDLOOP.
  ENDIF.