hi to all,
i have just learned how to display saved multiple select values on update operation.
$tselected = explode(",",$model->columnname);
foreach($tselected as $single)
{
$testsel[$single] = array("selected"=>"selected");
}
from the above line columnname have id values like 1,2,3,4…
first i changed string to array. then each array i assign selected option.
echo $form->dropDownList(
$model,
'test',
$testslist,
array('multiple'=>'multiple',
'key'=>'testid', 'class'=>'multiselect','options'=>$testsel)
);
finally create option parameter and pass array values