ALV Table and dynamic new column

[Former Member]

Hi,

I have a ALV table with tree in one column (reccuring context value).

I would like dynamically to add new columns. I know the method of IF_WD_CONTEXT_NODE_INFO->ADD_NEW_CHILD_NODE, but this is used in another posts/blogs where whole table is generated dynamically. I have a table already and just want to add a new column.

Is that possible?

Thank you on advance, cheers.

[thomas_jung]

Under normal circumstances you could use the Context API method ADD_ATTRIBUTE to create a dynamic attirubte:

http://help.sap.com/saphelp_nw70ehp1/helpdata/en/af/cb744176cb127de10000000a155106/frameset.htm

Unfortunately this is not compatible with the ALV. The ALV only supports static attributes. Therefore you will need to build up an entire RTTI based structure in memory and then dynamically re-create the entire context. This is a similar example:

data:
         rootnode_info type ref to if_wd_context_node_info,
         dyn_node type ref to if_wd_context_node,
         dyn_node_info type ref to if_wd_context_node_info,
         tabname_node type ref to if_wd_context_node,
         current_tablename type string,
         tablename type string,
         struct_type type ref to cl_abap_structdescr,
          table_type  type ref to cl_abap_tabledescr,
          comp_tab    type cl_abap_structdescr=>component_table,
          comp        like line of comp_tab,
          my_table    type ref to data,
          my_row      type ref to data.


    loop at field_details assigning <wa_detail>.
* build a structure description from the list of single fields
          comp-name = <wa_detail>-field_code.
          comp-type ?= cl_abap_datadescr=>describe_by_name( 'STRING' ). "Replace with your dataType
        append comp to comp_tab.
      endloop.

 struct_type = cl_abap_structdescr=>create( comp_tab ).
      dyn_node_info = rootnode_info->add_new_child_node(
         name                   = 'MDM_DATA'
         is_mandatory           = abap_false
         is_mandatory_selection = abap_false
         static_element_rtti    = struct_type
         is_multiple            = abap_true
         is_static              = abap_false ).