How to validate editable field in ALV

Question

Hi All,
I have a alv program using OOPS concept where two fields(columns) are editable in the alv output. These two columns contain table names and field names which can be edited.
I just want to validate these table and field names when we press the save button. If the edited entry is valid,i.e., the tablename is existing in the database, then it must update the entered value oftbl name to the db. else it shud give a error msg.
Please help with this code.
Thanks in Advance.

Answer 1

Hey!!!
Try using this...
CLASS lcl_event_receiver DEFINITION.
  PUBLIC SECTION.
    METHODS : handle_data_changed FOR EVENT data_changed
                                  OF  cl_gui_alv_grid
                                  IMPORTING er_data_changed.
ENDCLASS.
CLASS lcl_event_receiver IMPLEMENTATION.
  METHOD handle_data_changed.
    PERFORM data_changed USING er_data_changed.
  ENDMETHOD.   
ENDCLASS.
form DATA_CHANGED  using p_er_data_changed
                         TYPE REF TO cl_alv_changed_data_protocol.
  DATA : ls_mod_cells TYPE lvc_s_modi,
               declare a variable for your table or field name.
  LOOP AT p_er_data_changed->mt_good_cells INTO ls_mod_cells.
      CASE ls_mod_cells-fieldname.
      WHEN 'LIFNR'.
          CALL METHOD p_er_data_changed->get_cell_value
          EXPORTING
            i_row_id    = ls_mod_cells-row_id
            i_fieldname = 'LIFNR'
          IMPORTING
            e_value     = The variable you have defined.
put ur condition according to variable here, if the condition is not satisfied, then throw a message like this.
        CALL METHOD p_er_data_changed->add_protocol_entry
            EXPORTING
              i_msgid     = 'ZFI'
              i_msgno     = '999'
              i_msgty     = 'E'
              i_msgv1     = 'Employee Number Doesn''t Exist'
              i_fieldname = ls_mod_cells-fieldname
              i_row_id    = ls_mod_cells-row_id.
          EXIT.
        ENDIF.
Hope this helps.
Regrds,
Abhinab Mishra