Default value is not setting up

Hi All,

I am trying to set default value for NUMBER_PARENT attribute in BTADMINI in BT116QIT_SRVQ component at the line item level...

I have written my code in DO_PREPARE _OUTPUT as shown below..but it is setting up default value for the first line item not for all the line items..

Can we use the set_property method inside while..?  Could you please let me know what is the best way to set default value for all the line items..

I appreciate your help in advance..

data:

        it_item_data    TYPE TABLE OF crmst_admini_btil,

         ls_item_data    TYPE crmst_admini_btil.

lr_item_data ?= me->typed_context->btadmini->get_collection_wrapper( ).

     CHECK lr_item_data IS BOUND.

     lr_item_entity ?= lr_item_data->get_first( ).

     WHILE lr_item_entity IS BOUND.

       lr_item_entity->get_properties( IMPORTING es_attributes = ls_item_data ).

              lr_item_entity->set_property(

                       iv_attr_name = 'NUMBER_PARENT'                 "#EC NOTEXT

                       iv_value     = '0000000010' ).

       APPEND ls_item_data TO it_item_data.

       lr_item_entity ?= lr_item_data->get_next( ).

     ENDWHILE.

Thanks,

Susan