Function module to create FIELD CATALOG

Question

I am displaying data through ALV using SET_TABLE_FOR_FIRST_DISPLAY method of class CL_GUI_ALV_GRID.
is there any function module available to create the field catalog for that??
the F.M. "REUSE_ALV_FIELDCATALOG_MERGE" is giving some error for that. any other function moudle  is available or not??
how to use above function module for that??

Answer 1

Hi,
There are many ways in which to build a field catalog, some of which can be found below:
Building a fieldcatalog based on a dictionary structure/table
This Method requires you to create a dictionary structure via
SE11 and pass that in the 'I_STRUCTURE_NAME' parameter.
The below example will be for all of EKKO but you could create a new
structure containing only the fields you require.
*For Function module ALV (report)
DATA: it_fieldcat  TYPE slis_t_fieldcat_alv,
          wa_fieldcat   LIKE LINE OF it_fieldcat.
CALL FUNCTION 'REUSE_ALV_FIELDCATALOG_MERGE'
    EXPORTING
      i_structure_name       = 'EKKO'
    CHANGING
      ct_fieldcat            = it_fieldcat
    EXCEPTIONS
      inconsistent_interface = 1
      program_error          = 2
      OTHERS                 = 3.
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
            WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.
*For object ALV (Screen)
DATA: gd_fieldcat2 type LVC_T_FCAT.
CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
    EXPORTING                             
       I_BUFFER_ACTIVE                =        
      I_STRUCTURE_NAME            = 'EKKO'  
      I_CLIENT_NEVER_DISPLAY   = 'X
      I_BYPASSING_BUFFER         =        
   CHANGING
      ct_fieldcat                              = gd_fieldcat2
    EXCEPTIONS
      INCONSISTENT_INTERFACE = 1
      PROGRAM_ERROR              = 2
      OTHERS                               = 3.
Regards,
Shyamala
Edited by: Shyamala S on May 25, 2009 3:21 PM