How to check pc file path validity?

Hi,
In my program I have to extract so much SAP data and write in a file in the fornt-end PC. In the selection screen I will input the filepath\name to write the data.
But how should I check whether the filepath is valid or not in the 'AT SELECTION-SCREEN' event itself? so that if it is not valid path, I can give an error message before extracting all the SAP data.
Thank you!
Sunitha.

Hi Sunitha,
Please check the following sample code from other thread at selection screen value request event.
Using ABAP Objects:
PARAMETER : p_file LIKE rlgrap-filename.
AT SELECTION-SCREEN ON VALUE-REQUEST FOR path.
DATA: directory TYPE string,
 filetable TYPE filetable,
 line TYPE LINE OF filetable,
 rc TYPE i.
CALL METHOD cl_gui_frontend_services=>get_temp_directory
CHANGING
 temp_dir = directory.
CALL METHOD cl_gui_frontend_services=>file_open_dialog
EXPORTING
 window_title = 'SELECT THE FILE'
 initial_directory = directory
 file_filter = '*.XLS'
 multiselection = ' '
 CHANGING
 file_table = filetable
 rc = rc.
IF rc = 1.
READ TABLE filetable INDEX 1 INTO line.
P_FILE = line-filename.
ENDIF.
Using Normal ABAP:
DATA: P_FILE LIKE RLGRAP-FILENAME,
 DPATH LIKE RLGRAP-FILENAME,
 UPATH LIKE RLGRAP-FILENAME,
 MODE TYPE C,
 FLG_UD TYPE C.
CALL FUNCTION 'WS_ULDL_PATH'
IMPORTING
 DOWNLOAD_PATH = DPATH
 UPLOAD_PATH = UPATH.
IF FLG_UD <> 'D'.
DPATH = UPATH.
MODE = 'O'.
ELSE.
MODE = 'S'.
ENDIF.
CALL FUNCTION 'WS_FILENAME_GET'
EXPORTING
 DEF_FILENAME = '*.XLS'
 DEF_PATH = DPATH
 MASK = ',*.XLS,*.*,*.*.'
 MODE = MODE
IMPORTING
 FILENAME = P_FILE
EXCEPTIONS
 SELECTION_CANCEL = 3.
IF SY-SUBRC <> 0.
EXIT.
ENDIF.
Hope this will help.
Regards,
Ferry Lianto

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