i am trying this sample about Creating a dependent dropdown i created form in provinceCity/_form and copy actionDynamiccities to ProvinceCityController.php but when i change dropDown list i have not any change ? i think i must to enable ajax but i do not how i do it?
<?php echo CHtml::dropDownList('country_id','', array(1=>'USA',2=>'France',3=>'Japan'),
array(
'ajax' => array(
'type'=>'POST', //request type
'url'=>CController::createUrl('ProvinceController/dynamiccities'), //url to call.
//Style: CController::createUrl('ProvinceCity/methodToCall')
'update'=>'#city_id', //selector to update
//'data'=>'js:javascript statement'
//leave out the data key to pass all form values through
)));
//empty since it will be filled by the other dropdown
echo CHtml::dropDownList('city_id','', array()); ?>