function btnLoginClick($sender, $params)
{
    $mysqlsvr = new SQLConnection('10.10.1.27', $edUsername.Text, $edPassword.Text, 'exp_main');
    $mysqlsvr.open;

    if fails then
        WARNING
    else
        Open new page
}

$text = $this->ComponentName->Text; // Right.
$text = $ComponentName.Text; // Wrong.