发送网格附件不起作用，

Below code is provided, it sends file as an attachment, but file is empty i.e file does not have any data. Only I can see file name in email as an attachment, file have data which is saved, but in email it is empty.

$basePath = Yii::app()->basePath;

Data come from database table and here .xls file is created and saved in local folder

file_put_contents($basePath.'/../reports/excelreport.xls', $data);

$htmlbody = 'Content goes here';

Saved file path, which to send in email as an attachment.

$path = Yii::app()->basePath . '/../reports/excelreport.xls';
$message = Yii::app()->sendgrid->createEmail();

$message->setHtml($htmlbody)
                ->setSubject('Reports Alert')
                ->addTo($email)
                ->setFrom('account@simplifyvms.net')
            ->setAttachment($path);
            Yii::app()->sendgrid->send($message);
?>