public static void submitRejected(string reqListNumber, string comment)
        {
            RequisitionDAO.changeReqListStatusRejected(reqListNumber, comment);

            Employee e             = RequisitionDAO.getEmp(reqListNumber);
            string   receiverEmail = e.Email;
            string   depCode       = e.DepartmentCode;
            Employee head          = EmployeeDAO.getDepHeadEmployee(depCode);
            string   senderEmail   = head.Email;

            MailMessage m = new MailMessage(senderEmail, receiverEmail);

            m.Subject = "";
            m.Body    = "Your request has been rejected";
            SmtpClient c = new SmtpClient("lynx.iss.nus.edu.sg");

            c.Send(m);
            RequisitionDAO.changeReqListStatusApproved(reqListNumber);
        }
        public static void submitApproval(string reqListNumber, string mobileORweb)
        {
            if (mobileORweb == "web")
            {
                RequisitionDAO.changeReqListStatusApproved(reqListNumber);
            }

            else if (mobileORweb == "mobile")
            {
                Employee e             = RequisitionDAO.getEmp(reqListNumber);
                string   receiverEmail = e.Email;
                string   depCode       = e.DepartmentCode;
                Employee head          = EmployeeDAO.getDepHeadEmployee(depCode);
                string   senderEmail   = head.Email;

                MailMessage m = new MailMessage(senderEmail, receiverEmail);
                m.Subject = "";
                m.Body    = "Your request has been approved";
                SmtpClient c = new SmtpClient("lynx.iss.nus.edu.sg");
                c.Send(m);
                RequisitionDAO.changeReqListStatusApproved(reqListNumber);
            }
            //RequisitionDAO.changeReqListStatusApproved(reqListNumber);
        }