changing the header text in the alv displayed in web dynpro abap

DATA lo_value TYPE REF TO cl_salv_wd_config_table.

lo_value = lo_interfacecontroller->get_model( ).

DATA: lr_field TYPE REF TO cl_salv_wd_field.

lr_field = lo_value->if_salv_wd_field_settings~get_field(

'FNAME' ).

• change the label of the report.

DATA: lr_weeknum TYPE REF TO cl_salv_wd_column.

CALL METHOD lo_value->if_salv_wd_column_settings~get_column

EXPORTING

id = 'FNAME'

RECEIVING

value = lr_weeknum.

• SET THE LABEL OF THE COLUMN

DATA: hr_weeknum TYPE REF TO cl_salv_wd_column_header.

CALL METHOD lr_weeknum->get_header

RECEIVING

value = hr_weeknum.

CALL METHOD lr_weeknum->set_resizable

EXPORTING

value = abap_false.

hr_weeknum->set_prop_ddic_binding_field(

property = if_salv_wd_c_ddic_binding=>bind_prop_text

value = if_salv_wd_c_ddic_binding=>ddic_bind_none ).

• • set the text of the column

CALL METHOD hr_weeknum->set_text

EXPORTING

value = 'Characteristic Value'.