Field Symbols in Download to excel FM

Question

Hi All,
I am trying to use something like below.
field-symbols : <gt_outtab> type any.
Here <gt_outtab> is a dynamic internal table.
It gives me an error message saying ""
i might be asking very silly question but am not able to find a solution.
Is the below code wrong...then is there any FM which supports usage of field symbols in FM to download data with field names.
another thing...is there any way to read the Component names in a field symbol...I am able to read the contents of the same using Assign component though.
CALL FUNCTION 'GUI_DOWNLOAD'
       EXPORTING
            filename   = 'C:\test1.xls'
            filetype   = 'ASC'
            append     = 'X'
       TABLES
            data_tab   = <gt_outtab>
            fieldnames = gt_fieldcat.
Any help is appreciated.
BR,
Krishna.

Answer 1

Hi Max,
thanks for that...I did get the structure and was able to create a Dynamic table using the Field catalog fieldnames.
Now I have all my values in <gt_outtab> table and the dynamic table created from the field catalog is <gt_fieldcat> .
DATA: it_create    TYPE REF TO cl_alv_table_create,
        it_dinamica     TYPE REF TO data,
        it_fieldcat_lvc TYPE lvc_t_fcat.
CALL METHOD it_create->create_dynamic_table(
              EXPORTING it_fieldcatalog = gt_save_fieldcat
          IMPORTING ep_table                = it_dinamica ).
  ASSIGN it_dinamica->* TO <fs_dinamica>.
All I want is to Move corresponding from one fieldsymbol to another.
something like      move-corresponding <gt_outtab> to <gt_fieldcat> . But it gives me an error saying its not a structure etc.
I tried another way as well.
loop at <gt_outtab> assigning <gs_outtab>.
ASSIGN COMPONENT   MY_STRUCT->COMPONENTS-NAME
OF STRUCTURE <gs_outtab> TO <fs1>.
All I have now is a fieldcatalog..a table with all values...
Move corresponding doesn't work as it says this is not a structure or an internal table.
as this is not a static structure that I am referring to it doesnt allow me to do this.
I think there is no concept of type casting a Field Symbol like another field symbol at runtime.
like : field-symbols : <fs>, <fs1> , <fs2> type itab1.
assign <fs2> to <fs> casting.  which then transforms <fs2> to structure <fs>.
for e.g :
<gt_fieldcat>  :
orderno itemno adsize date price
<gt_outtab> has below values
orderno itemno price   date               adsize
400         10       200   10.10.2010        45
500         20       150   11.09.2010        55
All i need is the same field catalog and the rows in as per the fields in the <gt_fieldcat>.
When there is something gt_sp_groups while passing into the below method, the fieldcat and the output table are in same structure but after this method if I try to read the current Field catalog using method " get_frontend_fieldcatalog" ...it gives me a different one after applying the Groups etc.,in such cases I think the ALV excel download doesnt work. I tried checking SAP Notes for the same, but could not find anything. It will be helpful if I can get any notes related to that.
e.g.
CALL METHOD gr_alvgrid->set_table_for_first_display
  EXPORTING                                        
    is_layout                     = gs_layout      
    it_special_groups             = gt_sp_groups   
    it_toolbar_excluding          = gt_exclude .    
Any one any ideas please....at the moment the only way i am trying is forcing all the fields as characters into the Excel which obvisouly limits if it is a Price columns.
Many thanks,
Krishna.
Edited by: Krishna on Nov 11, 2010 2:24 AM
Edited by: Krishna on Nov 11, 2010 5:56 PM