Problem when getting attribute value.. pls respnd

Question

Hi friends,
I have a table with one field drop down. I created a node and subnode(for dropdown, and assinged a supplyfunction), and binded the table.
When WDA loads, the data is populating correctly.
When i click ADD new ROW, i am reading the current(row of table) values and storing in a table.
to read dropdown, im using the below code:
node_serv_prod = wd_context->get_child_node( name = wd_this->wdctx_serv_prod ).(main node)
  node_prod = node_serv_prod->get_child_node( name = wd_this->wdctx_prod ).(subnode).
  node_prod->get_static_attributes(
  EXPORTING
    index  = prev_line
    IMPORTING
      static_attributes = stru_prod )
WHen the control goes to get_static_attribute, and when i hit F5 in debuggin, it is going to supplyfunction of subnode dropdown. which i dont want. because it is not giving the current row's value of drop down.
Basically i want to read the current row's drop down value, when i click add new row button.
Kindly pls tell me how can i do this.
pls respnd.
thanks in advance.. friends
Niraja.

Answer 1

Hi Niraja,
Am not clear as to why you have created a subnode just for populating some values for your dropdown. You could have just created a normal attribute under the same node which you are binding to your table. You could have then typed this attribute with a domain having your desired values as its fixed values or else you could have coded within the WDDOINIT method like something shown below:
data: lr_node_info type ref to if_wd_context_node_info,
        wa_value_set type wdr_context_attr_value,
        lt_value_set type table of wdr_context_attr_value.
  lr_node = wd_context->get_child_node( name = 'NODE' ).
  lr_node_info = lr_node->get_node_info( ).
  wa_value_set-value = '1'.
  wa_value_set-text  = 'One'.
  insert wa_value_set into table lt_value_set.
  wa_value_set-value = '2'.
  wa_value_set-text  = 'Two'.
  insert wa_value_set into table lt_value_set.
  wa_value_set-value = '3'.
  wa_value_set-text  = 'Three'.
  insert wa_value_set into table lt_value_set.
  lr_node_info->set_attribute_value_set( name      = 'TEMP'
                                         value_set = lt_value_set ).
Your control does rightly enter into the supply function. When you are trying to add a new row you are basically trying to add a new blank entry to your internal table which is bound to your table. Now for this dropdown you have bound it to a subnode & this node has a supply function attached to it. You should keep it in mind that the supply function does get automatically triggered when:
1) The node collection is initial.
2) The lead selection in the parent node collection is changed.
3) The node collection is invalidated programmatically.
If you had used the approach of binding your dropdowns to an attribute created directly under the same node which you are using to bind to your table then even any newly added rows would automatically get the set of values populated inside them.
Regards,
Uday