Adding layout variant to selection screen

Question

Hi all,
         Currently I am working on report program, where I have to allow user to select his own output pattern. i.e layout variant is to be added to selection screen. The report uses object oriented ALV for display purpose. [set_table_for_first_display]
I made following steps,
1.     Declared one parameter of type disvariant.
2.     At selection-screen on value-request I called function REUSE_ALV_VARIANT_F4.
3.     Passed internal table to method set_table_for_first_display.
Now I am able to create save new variant, on selection screen I can select the variant that I have created, but output shows the all the fields though
Only few are selected. Please tell me any modification so as to reflect the changes in output.
I  am searching for a function which maintains fieldcat according to user defined variant.
Regards,
Nilesh kulkarni.

Answer 1

U have to use REUSE_ALV_VARIANT_EXISTENCE inorder to use the layout u have selected
After ur code of REUSE_ALV_VARIANT_F4.
try this way
AT SELECTION-SCREEN.
   PERFORM PAI_OF_SELECTION_SCREEN.
G_REPID = SY-REPID.
G_SAVE = 'A'.
FORM PAI_OF_SELECTION_SCREEN .
  IF NOT P_LAYOUT IS INITIAL.
    MOVE G_VARIANT TO GX_VARIANT.
    MOVE P_LAYOUT TO GX_VARIANT-VARIANT.
    CALL FUNCTION 'REUSE_ALV_VARIANT_EXISTENCE'
         EXPORTING
              I_SAVE     = G_SAVE
         CHANGING
              CS_VARIANT = GX_VARIANT.
    G_VARIANT = GX_VARIANT.
  ELSE.
    PERFORM VARIANT_INIT.
  ENDIF.
ENDFORM.                    " PAI_OF_SELECTION_SCREEN
FORM variant_init .
  CLEAR G_VARIANT.
  G_VARIANT-REPORT = G_REPID.
ENDFORM.                    " variant_init
Then when u call ALV for display, pass ur display variant, in this case  = g_variant
Reward if useful
Cheers
~Arun
Message was edited by:
        Arun Shekhar