How can i get selected value in multiple dropdown in admin form

Question

Code:

$fieldset->addField('race', 'multiselect', array(
 'label' => Mage::helper('tuition')->__('Race'),
 'values' => Example_Tuition_Block_Adminhtml_Student_Grid::getValueArray4(),
 'name' => 'race', 
 "class" => "required-entry",
 "required" => true,
 ));

in grid.php

static public function getOptionArray4()
{
 $data_array=array(); 
 $data_array[0]='Indian';
 $data_array[1]='Chinese';
 $data_array[2]='Malay';
 $data_array[3]='Eurasian';
 $data_array[4]='Others';
 return($data_array);
}
static public function getValueArray4()
{
 $data_array=array();
 foreach(Example_Tuition_Block_Adminhtml_Tutor_Grid::getOptionArray4() as $k=>$v){
 $data_array[]=array('value'=>$k,'label'=>$v); 
 }
 return($data_array);
}

and save data like this

$post_data['race'] = implode(',',$post_data['race']); // 0,1,2,3 

Now i want to get selected value in admin form how can i do this

enter image description here

Here i want to get selected that value which is saved in database but i m getting only one selected value

• saravanavelu: What values you get in implode(',',$post_data['race']); ?
• ND17: this value 0,1,2,3
• saravanavelu: you need Indian,Chinese, Malay etc..right?
• ND17: i want that value selected
• saravanavelu: you want the label or value?

Answer 1

in form.php

Here you can set value

if (Mage::getSingleton("adminhtml/session")->getStudentData())
 {
 $data = Mage::getSingleton('adminhtml/session')->getStudentData();
 $data['race'] = isset($data['race']) ? explode(',', $data['race']) : array(); // using this you can get value of multiple dropdown selected 
 $form->setValues($data);
 Mage::getSingleton("adminhtml/session")->setStudentData(null);
 } 
 elseif(Mage::registry("student_data")) {
 $data = Mage::registry('student_data')->getData();
 $data['race'] = isset($data['race']) ? explode(',', $data['race']) : array(); // using this you can get value of multiple dropdown selected 
 $form->setValues($data);
 }