// GET: MassCollection
        public ActionResult Index(int?page, string MemberId = null, int BillID = 0, string sDate = null, string eDate = null, string currentMemerid = "", int currentBillID = 0, string CurrsDate = "", string curreDate = "")
        {
            if (MemberId != null)
            {
                page = 1;
            }
            else
            {
                MemberId = currentMemerid;
            }
            if (sDate != null)
            {
                page = 1;
            }
            else
            {
                sDate = CurrsDate;
            }
            if (eDate != null)
            {
                page = 1;
            }
            else
            {
                eDate = curreDate;
            }
            ViewBag.CurrsDate      = sDate;
            ViewBag.curreDate      = eDate;
            ViewBag.currentBillID  = BillID;
            ViewBag.currentMemerid = MemberId;


            var billRegisters = db.BillRegisters.Include(b => b.MemeberCompanyInfo).Where(s => s.paid == "N");

            if (!String.IsNullOrEmpty(MemberId))
            {
                List <string> memid = new List <string>();
                string[]      str   = MemberId.Split(',');
                foreach (string s in str)
                {
                    memid.Add(s);
                }


                billRegisters = from c in billRegisters
                                where memid.Contains(c.MemeberCompanyInfo.mid)
                                select c;
            }
            if (!String.IsNullOrEmpty(sDate) && !String.IsNullOrEmpty(eDate))
            {
                DateTime dtfrom = Convert.ToDateTime(sDate);
                DateTime dtTo   = Convert.ToDateTime(eDate);
                billRegisters = billRegisters.Where(s => s.BillDate >= dtfrom && s.BillDate <= dtTo);
            }



            billRegisters = billRegisters.OrderBy(s => s.BillID);
            int pageNumber = (page ?? 1);

            return(View(billRegisters.ToPagedList(pageNumber, 100)));
        }