topic Re: difference between normal FM AND A CLASS FM in Application Development and Automation Discussions

difference between normal FM AND A CLASS FM

Former Member — Tue, 06 Mar 2007 21:52:58 GMT

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.

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

Re: difference between normal FM AND A CLASS FM

Former Member — Tue, 06 Mar 2007 21:55:28 GMT

Hi,

I believe both are same..

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

Thanks,

Naren

Re: difference between normal FM AND A CLASS FM

Former Member — Tue, 06 Mar 2007 22:01:53 GMT

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

It is suggested to use CLASS method however.

Thanks,

Santosh

Re: difference between normal FM AND A CLASS FM

Former Member — Tue, 06 Mar 2007 23:28:59 GMT

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