topic Re: How to validate file path in Application Development and Automation Discussions

How to validate file path

Former Member — Thu, 03 Feb 2011 05:26:55 GMT

Hi,

I have field on my selection screen to enter file path. This parameter has F4 help to choose the file path. However, I have a concern over here...

If user enters file path manually(meaning that without using F4), there is chance that he may enter file path without any extension or without any drive/or the file which doesn't exist in the system ...In this case I want to validate the file path. And I should give an error saying "Invalid file path or name".

Could you please help me out with any FM or any other go for the same?

Thanks,

Sandeep

Re: How to validate file path

madhu_vadlamani — Thu, 03 Feb 2011 05:32:27 GMT

Dear Sandeep,

Just hard code that and make as default.

Regards,

Madhu.

Re: How to validate file path

Former Member — Thu, 03 Feb 2011 05:36:08 GMT

Is it about validating in Application Server ? If yes, check the method OPEN in class CL_RSAN_UT_APPSERV_FILE_READER. Method returns sy-subrc 1 if there is an error in opening the specified file name.

If it is validation from GUI, check the methods "DIRECTORY_EXIST" and "FILE_EXIST" in class CL_GUI_FRONTEND_SERVICES.

Re: How to validate file path

Former Member — Thu, 03 Feb 2011 05:45:14 GMT

Hi Sandeep Reddy,

To validate the file path use the Function module

CV120_DOC_FILE_EXISTENCE_CHECK

It will check whether the file path you entered in the parameter PF_FILE exists or not.

Hope it helps.

Regards,

Phani Kumar M

Re: How to validate file path

Former Member — Thu, 03 Feb 2011 06:15:15 GMT

If you need to validate only the extension, you can do like the following code. Hopefully you must know the extension of the file.

filelen = strlen( filepath ).

filelen = filelen - 4 .

file_extn = filepath+filelen.

translate file_extn to upper case.

if file_extn ne '.csv'.

message 'Invalid file format.File extension should be '.CSV''.

endif.

Thanks & Regards,

Karthi

Re: How to validate file path

Former Member — Thu, 03 Feb 2011 07:17:02 GMT

If its an application server simply you can check this

open dataset d1........

if sy-subrc 0.

write:/ 'File path not found'.

endif.

If sy-subrc is zero, it means no file exists.

else you can use a function module

FILE_GET_NAME_USING_PATH

Regards,

Uttam Agrawal

http://www.abapmadeeasy.com

Edited by: uttamagrawal on Feb 22, 2011 9:22 AM

Re: How to validate file path

Former Member — Thu, 03 Feb 2011 08:19:22 GMT

Dear Sandeep,

You can try the following approach:

1. In the declaration part of the parameter in Selection-screen, hard code the directory name, say 'C:\temp\'.

PARAMETERS: p_file TYPE localfile DEFAULT 'C:\temp\'.

2. Event: AT SELECTION-SCREEN OUTPUT.

Set the parameter to input disabled (Screen-input = 0). This way the user will not be able to manually change the value.

3. Event: AT SELECTION-SCREEN ON VALUE-REQUEST FOR <parameter_name>, make use of the method 'File_open_dialog' of the class 'CL_GUI_FRONTEND_SERVICES' to read the filename. Once you have the file name, you need to update the same on the screen. So make use of this function module, DYNP_VALUES_UPDATE.

Hope you find this useful.

Cheers!!!

Amit

Edited by: Amit Kumar Singh on Feb 3, 2011 9:20 AM

Re: How to validate file path

Former Member — Thu, 03 Feb 2011 08:45:30 GMT

Hi,

Use can use the folowing approach:

1. Get the file name using

- CALL FUNCTION 'F4_FILENAME' or

- CL_GUI_FRONTEND_SERVICES->GUI_UPLOAD

2. Validate the file path - pass the file name found in step 1 above

- CALL METHOD cl_gui_frontend_services=>file_exist

EXPORTING

file = lv_file

RECEIVING

result = lv_result.

IF lv_result NE c_x.

MESSAGE e114(zzsam). " Invalid file name entered. Display error message.

endif.

Re: How to validate file path

Former Member — Thu, 03 Feb 2011 08:46:17 GMT

Hi,

Use the Method DIRECTORY_EXIST in class CL_GUI_FRONTEND_SERVICES.

After the POP UP use this method. If the sy-subrc is zero then the filepath exists other wise no.

With Regards,

Sumodh.P

Re: How to validate file path

Former Member — Thu, 03 Feb 2011 09:32:03 GMT

For the presentation server first you have to split the path entered into directory and file.You can used FM SO_SPLIT_FILE_AND_PATH for this purpose.

Now you can validate the directory and file independently using cl_gui_frontend_services=>directory_exist & cl_gui_frontend_services=>file_exist

*--FM to split File Path into Directory and File Name
  CALL FUNCTION 'SO_SPLIT_FILE_AND_PATH'
    EXPORTING
      full_name     = v_fname
    IMPORTING
      stripped_name = v_file
      file_path     = v_dir
    EXCEPTIONS
      x_error       = 1
      OTHERS        = 2.
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
            WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.

*--Method to Validate Directory
    CALL METHOD cl_gui_frontend_services=>directory_exist
      EXPORTING
        directory            = v_dir
      RECEIVING
        result               = lv_res
      EXCEPTIONS
        cntl_error           = 1
        error_no_gui         = 2
        wrong_parameter      = 3
        not_supported_by_gui = 4
        OTHERS               = 5.

    IF lv_res IS INITIAL.
      MESSAGE e000 WITH 'Directory does not exist'(010).
    ELSE.
      CLEAR lv_res.
*--Method to Validate File
      CALL METHOD cl_gui_frontend_services=>file_exist
        EXPORTING
          file                 = v_file
        RECEIVING
          result               = lv_res
        EXCEPTIONS
          cntl_error           = 1
          error_no_gui         = 2
          wrong_parameter      = 3
          not_supported_by_gui = 4
          OTHERS               = 5.

      IF lv_res IS INITIAL.
        MESSAGE e000 WITH 'File does not exist'(009).
      ENDIF.
    ENDIF.

For Application server you have to use open dataset only

OPEN DATASET v_fname FOR INPUT
                          IN TEXT MODE
                          ENCODING DEFAULT
                          IGNORING CONVERSION ERRORS.
    IF sy-subrc = 8.
      MESSAGE e000 WITH 'Invalid Directory or Filename'(015).
    ELSE.

Edited by: Rahuljn on Feb 3, 2011 3:27 PM

Re: How to validate file path

kesavadas_thekkillath — Thu, 03 Feb 2011 11:03:47 GMT

Sandeep,

Wy dont you search in SCN before posting. This has been discussed many times.