how to set session in codeigniter and access it inside methods?

Question

i want to set session in my controller and access the session data inside the methods. Can anyone tell me a way to implement this? and below is my code block

if ($data['result'] = $this->Webmanager_model->admin_login($credential)) {
    foreach ($data['result'] as $val) {
        $credentials = array(
            'adminid' => $val->admin_id,
            'name' => $val->name,
            'username' => $val->username);
    }
    $this->session->adminid = $val->admin_id;
    $this->session->name = $val->name;
    $this->session->username = $val->username;
    $this->load->view('dashboard1');
} else {
    echo "access denied";
}

this way iam set session but it shows null on the next method.

Answer 1

if($data['result'] = $this->Webmanager_model->admin_login($credential))
{
foreach ($data['result'] as $val) 
{
 $credentials=array('adminid'=>$val->admin_id,
 'name'=>$val->name,
 'username'=>$val->username);
}
// Set Session
$this->session->set_userdata("login_detail",$credentials);
$this->load->view('dashboard1');
} else {
echo "access denied";
}
// Get session;
$sessionArray=$this->session->userdata("login_detail");