Can I Set Property of ALV dynamically.. Instead of using MODIFYVIEW....

Question

Hi Friends,
I am new to Web Dynpro, I have question to you guys.. I dont know is it possible or not..
Ok the Question is..
My Requirement is to enable(Editable) or disable(Not editable) the column in ALV, according to so some conditions...
I have ALV table in my screen and lets assume that i have 20 column..
I know we can do this in method "WDDOMODIFYVIEW" of view . But i dont want to do this because every time when i click on the any element of the ALV on the screen it will go to method "WDDOMODIFYVIEW" and sets the attributes every single time.
Can i create a Context node with attributes of this 20 fields and bind the READ ONLY property of the ALV column to each one in context node. So that i can create a Method in Component controller and call that method every time where i disable or enable columns of ALV using a specific Action Button and change the Context node property.. Rather un nessasarily excecuting the method "WDDOMODIFYVIEW" of view every time for simply on clicking the checkbox of the ALV column or any thing .......
Hope i have made you people understand my Question..
Thanks for help in Advance.
Madhu MV.

Answer 1

Hi Lekha.. Thanks so much for the reply..
Please See the Below Code .. Let me know what i am doing wrong...
>  The column is NOT changed to Ediatble.... Please Help...
  LOOP AT lt_wo_item INTO ls_wo_item.
*--> Append Operation
    lv_op_num = ls_wo_item-z_oper_num.
    MOVE-CORRESPONDING ls_wo_item TO ls_wo_alv.
    IF lv_op_num NE lv_count_op.
      CLEAR lv_count_op.
      ADD lv_op_num TO lv_count_op.
      ls_wo_alv-z_op_count = lv_count_op.
      CLEAR lv_count.
      ADD lv_count_op TO lv_count.
      ls_wo_alv-z_item_count = lv_count.
      ls_wo_alv-readonly = abap_true.
      APPEND ls_wo_alv TO lt_wo_alv.
    ELSE.
      ls_wo_alv-z_op_count = lv_count_op.
      ADD '0.1'  TO lv_count.
      ls_wo_alv-z_item_count = lv_count.
      ls_wo_alv-readonly = abap_true.
      APPEND ls_wo_alv TO lt_wo_alv.
    ENDIF.
    LOOP AT lt_wo_services INTO ls_wo_services
      WHERE z_oper_num     = ls_wo_item-z_oper_num
        AND z_sub_oper_num = ls_wo_item-z_sub_oper_num.
*--Append Services.
      MOVE-CORRESPONDING ls_wo_services TO ls_wo_alv.
      ls_wo_alv-z_op_count = lv_count_op.
      ADD '0.1' TO lv_count.
      ls_wo_alv-z_item_count = lv_count.
      ls_wo_alv-readonly = abap_true.
      APPEND ls_wo_alv TO lt_wo_alv.
    ENDLOOP.
  ENDLOOP.
  DATA lo_nd_cn_alv TYPE REF TO if_wd_context_node.
  DATA lo_el_cn_alv TYPE REF TO if_wd_context_element.
  DATA ls_cn_alv TYPE wd_this->element_cn_alv.
  navigate from <CONTEXT> to <CN_ALV> via lead selection
  lo_nd_cn_alv = wd_context->get_child_node( name = wd_this->wdctx_cn_alv ).
  lo_nd_cn_alv->bind_table( lt_wo_alv ).
  DATA lo_cmp_usage TYPE REF TO if_wd_component_usage.
  lo_cmp_usage =   wd_this->wd_cpuse_alv_table( ).
  IF lo_cmp_usage->has_active_component( ) IS INITIAL.
    lo_cmp_usage->create_component( ).
  ENDIF.
  DATA lo_interfacecontroller TYPE REF TO iwci_salv_wd_table .
  lo_interfacecontroller =   wd_this->wd_cpifc_alv_table( ).
  DATA lo_value TYPE REF TO cl_salv_wd_config_table.
  lo_value = lo_interfacecontroller->get_model(
  DATA: lr_column   TYPE REF TO cl_salv_wd_column.
  DATA: lr_input TYPE REF TO cl_salv_wd_uie_input_field.
  DATA : lr_column_settings TYPE REF TO if_salv_wd_column_settings,
         lt_columns TYPE salv_wd_t_column_ref,
         ls_column TYPE salv_wd_s_column_ref.
  lr_column_settings ?= lo_value.
  lt_columns = lr_column_settings->get_columns( ).
  LOOP AT lt_columns INTO ls_column.
    CASE ls_column-id.
      WHEN 'Z_PRODUCT'.
        CREATE OBJECT lr_input
          EXPORTING
            value_fieldname = 'Z_PRODUCT'.
        CALL METHOD ls_column-r_column->set_cell_editor
          EXPORTING
            value = lr_input.
        CALL METHOD lr_input->set_read_only_fieldname
          EXPORTING
            value = 'READ_ONLY'.
    ENDCASE.
  ENDLOOP.