Smartform Preview Disabled when PDF download is implemented

Question

Dear All
I incoproated the PDF download option in the smartform.  It is working as expected,  However it disables the Preview Option.  I ddid not know where I am missing.  I like to have both Preview option as well as PDF download.
Very much helpful if someone throw light on it.
Regards,
Venkat

Answer 1

after useing the above code then write pdf download i.e
*&      Form  DISPLAY_PDF_OUTPUT
form display_pdf_output  using    f_sf_formname
                                       f_sf_fmname.
  call function 'SSF_GET_DEVICE_TYPE'
    EXPORTING
      i_language             = v_language
      i_application          = 'SAPDEFAULT'
    IMPORTING
      e_devtype              = v_e_devtype
    EXCEPTIONS
      no_language            = 1
      language_not_installed = 2
      no_devtype_found       = 3
      system_error           = 4
      others                 = 5.
  if sy-subrc <> 0.
  endif.
  st_output_options-tdprinter = v_e_devtype.
  st_control_parameters-no_dialog = 'X'.
  st_control_parameters-getotf = 'X'.
  call function 'SSF_FUNCTION_MODULE_NAME'
          exporting
            formname                 = f_sf_formname
          importing
            fm_name                  =  f_sf_fmname
         exceptions
           no_form                  = 1
           no_function_module       = 2
           others                   = 3            .
  if sy-subrc <> 0.
  endif.
  call function f_sf_fmname
   exporting
*   ARCHIVE_INDEX              =
     control_parameters         =  st_control_parameters
*   MAIL_APPL_OBJ              =
     output_options             = st_output_options
*   USER_SETTINGS              = 'X'
   importing
     document_output_info       = st_document_output_info
     job_output_info            = st_job_output_info
    job_output_options         =  st_job_output_options
    tables
      it_output                  = it_output
      it_final                   = it_final
* EXCEPTIONS
*   OTHERS                     = 5
  if sy-subrc <> 0.
  endif.
*Conveting to PDF
  call function 'CONVERT_OTF_2_PDF'
* EXPORTING
*   USE_OTF_MC_CMD               = 'X'
*   ARCHIVE_INDEX                =
     importing
       bin_filesize                 = v_bin_filesize
     tables
       otf                          = st_job_output_info-otfdata
       doctab_archive               = it_docs
       lines                        = it_lines
     exceptions
       err_conv_not_possible        = 1
       err_otf_mc_noendmarker       = 2
       others                       = 3
  if sy-subrc <> 0.
    message id sy-msgid type sy-msgty number sy-msgno
            with sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  endif.
*........................GET THE FILE NAME TO STORE....................*
  concatenate 'Tax_Invoice' '- ALL' sy-datum '.pdf' into v_name.
  create object v_guiobj.
  call method v_guiobj->file_save_dialog
    EXPORTING
      default_extension = 'pdf'
      default_file_name = v_name
      file_filter       = v_filter
    CHANGING
      filename          = v_name
      path              = v_path
      fullpath          = v_fullpath
      user_action       = v_uact.
  if v_uact = v_guiobj->action_cancel.
    exit.
  endif.
*..................................DOWNLOAD AS FILE....................*
  move v_fullpath to v_filename.
  call function 'GUI_DOWNLOAD'
    exporting
      bin_filesize                    = v_bin_filesize
      filename                        = v_filename
      filetype                        = 'BIN'
*     APPEND                          = ' '
*     WRITE_FIELD_SEPARATOR           = ' '
*   IMPORTING
*     FILELENGTH                      =
    tables
      data_tab                        = it_lines
*     FIELDNAMES                      =
    exceptions
      file_write_error                = 1
      no_batch                        = 2
      gui_refuse_filetransfer         = 3
      invalid_type                    = 4
      no_authority                    = 5
      unknown_error                   = 6
      header_not_allowed              = 7
      separator_not_allowed           = 8
      filesize_not_allowed            = 9
      header_too_long                 = 10
      dp_error_create                 = 11
      dp_error_send                   = 12
      dp_error_write                  = 13
      unknown_dp_error                = 14
      access_denied                   = 15
      dp_out_of_memory                = 16
      disk_full                       = 17
      dp_timeout                      = 18
      file_not_found                  = 19
      dataprovider_exception          = 20
      control_flush_error             = 21
      others                          = 22
  if sy-subrc <> 0.
    message id sy-msgid type sy-msgty number sy-msgno
            with sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  endif.
endform.                    " DISPLAY_