Preview and Download in ALV report blank

Question

Dear All,
I have a problem. When user preview and download to local save (txt, xls, etc) from report in ALV format, user get blank preview and blank file.
I use 2 FM.
1st i use FM REUSE_ALV_LIST_LAYOUT_INFO_GET to get fieldcat because user want to download after customize the layout (example default there are 5 field then user hide 2 field so only 3 field are displayed and downloaded).
2nd I use FM REUSE_ALV_GRID_DISPLAY to display as ALV format. and user can download via download button default in ALV format.
so, anyone.. could u help me ??
Thanks

Answer 1

Hi,
ok I generaeted the fieldcatalog for the above and try to execute as this as I described above
i am giving the code just check it.
type-pools SLIS.
data : lv_vbeln type vbak-vbeln.
select-options : so_vbeln for lv_vbeln.
initialization.
so_vbeln-low = '4970'.
so_vbeln-high = '4975'.
append so_vbeln.
data : lt_fcat type SLIS_T_FIELDCAT_ALV,
       ls_fcat like line of lt_fcat.
types : begin of ty_vbak,
         vbeln type vbak-vbeln,
         erdat type vbak-erdat,
         erzet type vbak-erzet,
         ernam type vbak-ernam,
       end of ty_vbak.
data : lt_vbak type standard table of ty_vbak,
       ls_vbak type ty_vbak.
data : ls_variant like DISVARIANT.
data : ls_layo type  SLIS_LAYOUT_ALV.
start-of-selection.
perform getvbak.
if sy-subrc eq 0.
perform displayvbak.
endif.
FORM GETVBAK .
select vbeln erdat erzet ernam from vbak
  into table lt_vbak
  where vbeln in so_vbeln.
ENDFORM.                    " GETVBAK
FORM DISPLAYVBAK .
clear ls_fcat.
ls_fact-fieldname = 'VBELN'.
ls_fcat-colpos = 1.
ls_fcat-seltext_m = 'Sales No'.
ls_fcat-outputlen = 10.
append ls_fcat to lt_fcat.
clear ls_fcat.
ls_fact-fieldname = 'ERDAT'.
ls_fcat-colpos = '2'.
ls_fcat-seltext_m = 'Date'.
ls_fcat-outputlen = 10.
append ls_fcat to lt_fcat.
clear ls_fcat.
ls_fact-fieldname = 'ERZET'.
ls_fcat-colpos = '3'.
ls_fcat-seltext_m = 'Time'.
ls_fcat-outputlen = 10.
append ls_fcat to lt_fcat.
clear ls_fcat.
ls_fact-fieldname = 'ERNAM'.
ls_fcat-colpos = '4'.
ls_fcat-seltext_m = 'Created By'.
ls_fcat-outputlen = 10.
append ls_fcat to lt_fcat.
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
EXPORTING
   I_CALLBACK_PROGRAM                = sy-repid
   IS_LAYOUT                         = ls_layo
   IT_FIELDCAT                       = lt_fcat[]
   I_SAVE                            = 'X'
   IS_VARIANT                        = ls_variant
  TABLES
    T_OUTTAB                          = lt_vbak[].
ENDFORM.                    " DISPLAYVBAK
Thanks & Regards,
Raghunadh K