How to get changed data in ALV in Web Dynpro for ABAP

Question

METHOD on_data_check .
DATA:
    node_spfli                          TYPE REF TO if_wd_context_node,
    node_sflight                        TYPE REF TO if_wd_context_node,
    itab_sflight2                        TYPE if_display_view=>elements_sflight.
  node_spfli = wd_context->get_child_node( name = if_display_view=>wdctx_spfli ).
  node_sflight = node_spfli->get_child_node( name = if_display_view=>wdctx_sflight ).
  CALL METHOD node_sflight->get_static_attributes_table
    IMPORTING
      table = itab_sflight2.
this code is ..get all data(changed and not changed)
but i want get changed data only, not all data.
how to get changed data?
Edited by: Ki-Joon Seo on Dec 27, 2007 6:04 AM

Answer 1

Hi,
To get only the changed data in the ALV grid of a WD, you need to capture the "ON_DATA_CHECK" of the ALV grid.
To this please do the following in the ALV initialization of the ALV table settings :
    lr_table_settings->set_data_check(
            IF_SALV_WD_C_TABLE_SETTINGS=>DATA_CHECK_ON_CELL_EVENT ).
You may also do this:
    lr_table_settings->set_data_check(            IF_SALV_WD_C_TABLE_SETTINGS=>DATA_CHECK_ON_CHECK_EVENT)
The above two ways would depend on when do you need to check for the changed data. If you want to check the data as soon as it is entered, then use the first method. Else, use the second method.
You need to register an EVENT HANDLER for this event.(You may do this in your VIEW or Component Controller).
In this Event handler, you would find an importing parameter R_PARAM which is a ref type of      IF_SALV_WD_TABLE_DATA_CHECK.
The attribute T_MODIFIED_CELLS of this interface IF_SALV_WD_TABLE_DATA_CHECK will contain the modified cells of the ALV with the old & new values.