Thanks Ankur,
Still text is invisible in portal.
I have created one text view UI element with invisible protperties. and also i have binded the visible properties to newly created attribute(type WDUI_VISIBILITY).
Code:
DATA: lv_value type wdui_visibility.
wd_comp_controller->update_view = abap_true.
wd_context->get_attribute(
EXPORTING name = 'TEXT_MEALS'
IMPORTINGvalue = lv_value ).
wd_context->set_attribute( EXPORTING name = 'TEXT_MEALS'
value = '01'
).