U can use the below code to get the value of check box in the ALV
*----------------------------------------------------------------------*
* CLASS lcl_event_handler IMPLEMENTATION
*----------------------------------------------------------------------*
CLASS ty_event_handler IMPLEMENTATION .
*
METHOD m_on_link_click.
DATA lwa_alv TYPE ty_output.
* Get the value of the checkbox and set the value accordingly
* Refersh the table
READ TABLE i_alv INTO lwa_alv INDEX row.
IF sy-subrc IS INITIAL.
IF lwa_alv-chk IS INITIAL.
lwa_alv-chk = 'X'.
MODIFY i_alv FROM lwa_alv INDEX row TRANSPORTING chk.
CLEAR lwa_alv.
ELSEIF lwa_alv-chk = 'X'.
CLEAR lwa_alv-chk.
MODIFY i_alv FROM lwa_alv INDEX row TRANSPORTING chk.
CLEAR lwa_alv.
ENDIF.
ENDIF.
ENDMETHOD. "on_link_click
*
ENDCLASS. "cl_event_handler IMPLEMENTATION
Regards,
Manasa.
