The CL_GUI_FRONTEND_SERVICES=>FILE_OPEN_DIALOG method is the standard object-oriented way in ABAP to trigger a file selection popup on a user's local machine. It replaces older function modules like WS_FILENAME_GET.
Basic Sample Code
This example demonstrates how to call the dialog and retrieve the selected file path to populate a selection screen parameter
abap
REPORT z_file_dialog_demo.
DATA: lt_file_table TYPE filetable, " Table to store selected files
lv_rc TYPE i. " Return code
PARAMETERS: p_file TYPE localfile. " Selection screen parameter
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_file.
" Call the File Open Dialog
CALL METHOD cl_gui_frontend_services=>file_open_dialog
EXPORTING
window_title = 'Select your Excel File'
default_extension = '*.xlsx'
file_filter = 'Excel Files (*.XLSX)|*.XLSX|All Files (*.*)|*.*'
multiselection = abap_false " Set to 'X' to allow multiple files
CHANGING
file_table = lt_file_table
rc = lv_rc
EXCEPTIONS
file_open_dialog_failed = 1
cntl_error = 2
error_no_gui = 3
not_supported_by_gui = 4
OTHERS = 5.
IF sy-subrc = 0 AND lv_rc > 0.
" Retrieve the first selected file path
READ TABLE lt_file_table INTO DATA(ls_file) INDEX 1.
IF sy-subrc = 0.
p_file = ls_file-filename.
ENDIF.
ENDIF.Key Parameters Explained
window_title: The text that appears at the top of the popup window.default_extension: Sets the initial file type the dialog looks for (e.g.,.txtor.xlsx).file_filter: Controls the "Files of type" dropdown. Use the formatDescription (*.ext)|*.ext.multiselection: Set toabap_true('X') if you want the user to be able to select multiple files at once.file_table: A table of typeFILETABLEthat will hold the paths of the selected files.rc: A return code that typically indicates the number of files selected by the user.
Common Use Cases
- F4 Help: Often used within the
AT SELECTION-SCREEN ON VALUE-REQUESTevent to provide a browse button for a file path input field. - Multi-File Selection: Unlike some older function modules, this method natively supports selecting several files at once for batch processing.
- File Uploading: Typically followed by a call to
CL_GUI_FRONTEND_SERVICES=>GUI_UPLOADto bring the selected file's data into an internal SAP table
Ref:
https://community.sap.com/t5/application-development-and-automation-discussions/cl-gui-frontend-services-gt-file-open-dialog-initial-directory-ignored/td-p/416130
https://community.sap.com/t5/application-development-and-automation-discussions/file-open-dialog-no-extension/td-p/12747028
