Transfer internal table data into PC file using class CL_GUI_FRONTEND_SERVICES

Scenario: Need to tansfer internal table data into  PC file or desktop file using class CL_GUI_FRONTEND_SERVICES in ABAP

Solution: check the code below

tables: lfa1.

types: begin of ty_lfa1,
       lifnr(10) type c,
       name1(35) type C,
       land1(2) type c,
       end of ty_lfa1.


Data: it_data type standard table of ty_lfa1.
data: wa_data type ty_lfa1.
data: v_filename type string,
      v_path     type string,
      v_fullpath type string,
      v_action   type I.
select-options: s_lfa1 for lfa1-lifnr.

select lifnr name1 land1 from lfa1 into corresponding fields of table it_data where lifnr in s_lfa1.

** calling window to enter file name and path
call method CL_GUI_FRONTEND_SERVICES=>FILE_SAVE_DIALOG
            exporting
              window_title      = 'Testing GUI'
              default_extension = 'txt'
              default_file_name  = 'Test file'
            changing
              filename          = v_filename
              path              = v_path
              fullpath          = v_fullpath
              user_action       = v_action.
if v_action = 0.

** Downloading data into specified file.

call method CL_GUI_FRONTEND_SERVICES=>GUI_DOWNLOAD
            exporting
              FILENAME   = v_filename
            changing
              data_tab   = it_data.
else.
  write: 'No'.
endif.

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