/** * Determines whether the current request is a postback. * This method should only be used by framework developers. */ public function determinePostBackMode() { if (!is_null($this->masterPage)) { $this->masterPage->determinePostBackMode(); } $this->isPostBack = isset($_REQUEST[self::INPUT_VIEWSTATE]); if ($this->isPostBack) { if (isset($_REQUEST[self::INPUT_EVENTPARAMETER])) { $this->postBackParameter = $_REQUEST[self::INPUT_EVENTPARAMETER]; } if (isset($_REQUEST[self::INPUT_EVENTTARGET])) { $this->postBackTarget = $_REQUEST[self::INPUT_EVENTTARGET]; } } }