Whether ineed to put selection between txt and xl file?

hi,
my requirement is to provide to upload data from legacy to sap.in my selection screen i hav to put both presentation and application server options.
If the presentation server option is selected then user can select the file type like Text or Excel?
i want the approach to how to code for presentation server.i.e,
a)whether i need to use radiobuttons for txt and excel file.

Hi
Check this sample code:
SELECTION-SCREEN BEGIN OF BLOCK B1 WITH FRAME TITLE TEXT-001.
PARAMETERS: FLATF RADIOBUTTON GROUP RAD1 USER-COMMAND X,
            UNIXF RADIOBUTTON GROUP RAD1 .
SELECTION-SCREEN SKIP 2.
SELECTION-SCREEN SKIP 2.
parameters: P_FNAME type RLGRAP-FILENAME MODIF ID P1,"here you can give your txt or excel file
            UNIXFILE type RLGRAP-FILENAME MODIF ID P2.
SELECTION-SCREEN SKIP .
selection-screen ULINE.
SELECTION-SCREEN: BEGIN OF LINE.
SELECTION-SCREEN POSITION 20.
parameters TESTRUN AS CHECKBOX default 'X'.
SELECTION-SCREEN: END OF LINE.
SELECTION-SCREEN END OF BLOCK B1.
AT SELECTION-SCREEN ON VALUE-REQUEST FOR P_FNAME. "to give F4 functionality for the local PC file
CALL FUNCTION 'F4_FILENAME'
* EXPORTING
*   PROGRAM_NAME        = SYST-CPROG
*   DYNPRO_NUMBER       = SYST-DYNNR
*   FIELD_NAME          = ' '
     IMPORTING
       FILE_NAME           = P_FNAME.
" the following steps will let u know If the file is an txt or excel file:
data: LEN TYPE I,
        v_fname type string.
if p_fname is not initial.
    MOVE P_FNAME TO V_FNAME.
else.
    MESSAGE I000(ZP).
ENDIF.
LEN = STRLEN( V_FNAME ).
LEN = LEN - 3.
IF V_FNAME+LEN(3) = 'xls'. "here IF the file is an excel..you write the condition you want.
Endif.
Hope you are clear,
Vishwa.

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