difference between normal FM AND A CLASS FM

[Former Member]

Hi all,

what is the difference if i call a FM gui_upload directly from pattern using CALL FUNCTION

or if i call it USING CLASS

I MEAN TO SAY WHAT IS THE DIFFERENCE BETWEEN BELOW TWO CODES.

1)

CALL METHOD cl_gui_frontend_services=>gui_upload

EXPORTING

filename =

• FILETYPE = 'ASC'

• HAS_FIELD_SEPARATOR = SPACE

• HEADER_LENGTH = 0

• IMPORTING

• FILELENGTH =

• HEADER =

changing

data_tab =

• EXCEPTIONS

• FILE_OPEN_ERROR = 1

• FILE_READ_ERROR = 2

• NO_BATCH = 3

• GUI_REFUSE_FILETRANSFER = 4

• INVALID_TYPE = 5

• NO_AUTHORITY = 6

• UNKNOWN_ERROR = 7

• BAD_DATA_FORMAT = 8

• HEADER_NOT_ALLOWED = 9

• SEPARATOR_NOT_ALLOWED = 10

• HEADER_TOO_LONG = 11

• UNKNOWN_DP_ERROR = 12

• ACCESS_DENIED = 13

• DP_OUT_OF_MEMORY = 14

• DISK_FULL = 15

• DP_TIMEOUT = 16

• others = 17

.

IF sy-subrc <> 0.

• MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO

• WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.

ENDIF.

2)CALL FUNCTION 'GUI_UPLOAD'

EXPORTING

filename =

• FILETYPE = 'ASC'

• HAS_FIELD_SEPARATOR = ' '

• HEADER_LENGTH = 0

• READ_BY_LINE = 'X'

• IMPORTING

• FILELENGTH =

• HEADER =

tables

data_tab =

• EXCEPTIONS

• FILE_OPEN_ERROR = 1

• FILE_READ_ERROR = 2

• NO_BATCH = 3

• GUI_REFUSE_FILETRANSFER = 4

• INVALID_TYPE = 5

• NO_AUTHORITY = 6

• UNKNOWN_ERROR = 7

• BAD_DATA_FORMAT = 8

• HEADER_NOT_ALLOWED = 9

• SEPARATOR_NOT_ALLOWED = 10

• HEADER_TOO_LONG = 11

• UNKNOWN_DP_ERROR = 12

• ACCESS_DENIED = 13

• DP_OUT_OF_MEMORY = 14

• DISK_FULL = 15

• DP_TIMEOUT = 16

• OTHERS = 17

.

IF sy-subrc <> 0.

• MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO

• WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.

ENDIF.

CAN ANYONE TELL WHAT 'S THE DIFFERENCE BETWEEN THE ABOVE TWO METHODS OF CALLING

Thanks

kajol

[Former Member]

Hi,

I believe both are same..

If you check the class method code..The FM GUI_UPLOAD FM will be called..

Thanks,

Naren

[Former Member]

I think theres no difference as the class itself uses FM 'GUI_UPLOAD'.

It is suggested to use CLASS method however.

Thanks,

Santosh

[Former Member]

Hi Kajol,

The cl_gui_frontend_services is developed for envelop the exists functions, to meet the OO develop requirement.

Both does the same job. If you look at the code inside the method cl_gui_frontend_services=>gui_upload, it would be calling GUI_UPLOAD function.

In terms of performance efficiency, there will be a very negligible difference and call function will be slightly better in my opinion.

Regards,

Ferry Lianto