public Pagereference SavePartialSurvey() {
    try{
    system.debug('inside SavePartialSurvey');
    SubmitSurvey(false);
    system.debug('-------------------'+bVal);
    if (bVal == true) {
        ResultPanel = true;
        QuestionPanel = false;
        ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.Info,'Your survey has been saved successfully. Please click on the same link to complete the survey.'));

        return null;
    } else {
        return null;
    }
    }
    catch(Exception ex)
    {
        system.debug('Message+++'+ex.getMessage());
        system.debug('LineNumber+++'+ex.getLineNumber());
    }
    return null;
}