Mandatory field in Editable ALV

Question

Hi everyone,
How to make a field as mandatory in an Editable ALV?
Is there any field catalog parameter avaialble??
or how can we do it.
Please give me a solution.
Regards
Hemanth

Answer 1

Hi!
I use this solution. With this code, you can manage the mandantory filels via fileld cat.
METHOD handle_data_changed.
    DATA: ls_fcat       TYPE lvc_s_fcat,
                structure     TYPE REF TO data,
                ls_modi       TYPE lvc_s_modi,
                tabix         TYPE i,
                index         TYPE sytabix,
                lr_str_desc   TYPE REF TO cl_abap_structdescr,
                ls_comp_desc  TYPE abap_compdescr,
                ls_structure  type ty_zt921_alv.
    FIELD-SYMBOLS: <itab>     TYPE ANY TABLE,
                   <struct>         TYPE ANY,
                   <fs_strukture>   TYPE ANY,
                   <fs_field>       TYPE ANY.
    IF e_onf4 IS INITIAL.
      READ TABLE er_data_changed->mt_fieldcatalog INTO ls_fcat
                                  INDEX 1.
      CREATE DATA structure TYPE (ls_fcat-ref_table).
      ASSIGN structure->* TO <struct> CASTING TYPE (ls_fcat-ref_table).
      ASSIGN er_data_changed->mp_mod_rows->* TO <itab>.
      LOOP AT <itab> ASSIGNING <struct>.
        MOVE-CORRESPONDING <struct> TO ls_structure.
        ASSIGN ls_structure TO   <fs_strukture>.
        lr_str_desc ?= cl_abap_typedescr=>describe_by_data( <fs_strukture> ).
        index = index + 1.
        LOOP AT lr_str_desc->components INTO ls_comp_desc.
          ASSIGN COMPONENT ls_comp_desc-name OF STRUCTURE <fs_strukture> TO <fs_field>.
          READ TABLE er_data_changed->mt_fieldcatalog
                      INTO ls_fcat
                      WITH KEY fieldname = ls_comp_desc-name
                               mark = 'X'.      
        IF sy-subrc = 0.
            IF <fs_field> IS INITIAL.           
            CALL METHOD er_data_changed->add_protocol_entry
              EXPORTING
                i_msgid     = 'ZH'
                i_msgno     = '044'
                i_msgty     = 'E'
*        i_msgv1     = text-m03          
                i_msgv2     = <fs_field>
*        i_msgv3     = text-m05          
                i_fieldname = ls_comp_desc-name
                i_row_id    = index.
              error_in_data = 'X'.
            ENDIF.
          ENDIF.
        ENDLOOP.
ENDLOOP.
ENDIF.
ENDMETHOD. "handle_before_user_command