We  know how to use some familiar events of ALV in Web Dynpro for ABAP like ON_DATA_CHECK,ON_CLICK,ON_LEAD_SELECT. Here  I am going to show how to use the ON_CELL_ACTION event .

When we change the data in any cell of ALV table and press enter, ON_CELL_ACTION event will trigger and will give changed value in cell.

1.Create a method in the view name it like ON_CELL_ACTION,method type is Event handler that select from drop down and select event is ON_CELL_ACTION from Interface Controller Events.

2.Now to trigger this event write the below code in WDDOMODIFYVIEW method of view.

* Data Declaration
data lo_cmp_usage type ref to if_wd_component_usage.

data lo_interfacecontroller type ref to iwci_salv_wd_table .

data lo_value type ref to cl_salv_wd_config_table.

* Instantiate ALV

lo_cmp_usage = wd_this->wd_cpuse_alv( ).

if lo_cmp_usage->has_active_component( ) is initial.

lo_cmp_usage->create_component( ).

endif.

lo_interfacecontroller = wd_this->wd_cpifc_alv( ).

* Call get_model of Interface Controller to get reference of ALV

lo_value = lo_interfacecontroller->get_model(

).

* Enable the ON_CELL_ACTION Event

call method lo_value->if_salv_wd_table_settings~set_cell_action_event_enabled

exporting

value = ABAP_TRUE .