public ActionResult Index(int? page, string sortOrder)
        {
            ViewBag.NameSortParm = String.IsNullOrEmpty(sortOrder) ? "Name_desc" : "";
            ViewBag.DateSortParm = sortOrder == "Date" ? "Date_desc" : "Date";

            ViewBag.Total = ViewBag.AllCash = 0;
            db.Users.ToList().ForEach(x => ViewBag.AllCash += (x.Score * 100) + x.Cash);

            var UserHasCash = db.Users.Where(x => x.Cash != null && x.Cash > 0).Select(x => new CashViewModel
            {
                ID = x.ID,
                Name = x.Name,
                PhoneNumber = x.PhoneNumber,
                Cash = x.Cash.Value,
                Pay = false
            }).ToList();

            UserHasCash.ForEach(x => ViewBag.Total += x.Cash);

            var pageNumber = page ?? 1; // if no page was specified in the querystring, default to the first page (1)
            var onePageOfUser = UserHasCash.ToPagedList(pageNumber, 5); // will only contain 25 products max because of the pageSize

            return View(onePageOfUser);
        }

        [HttpPost]
        public async Task<ActionResult> Index(List<CashViewModel> PayList)
        {
            if (Request.Form["btnPayed"] != null)
            {
                var payedIds = PayList.Where(x => x.Pay).Select(x => x.ID).ToList();
                
                db.Users.Where(x => payedIds.Contains(x.ID)).ToList().ForEach(x => x.Cash = 0);

                List<Payed> pl = new List<Payed>();
                foreach (var item in payedIds)
                {
                    Payed p = new Payed()
                    {
                        UserID_FK = item,
                        User = db.Users.Where(x => x.ID == item).FirstOrDefault(),
                        Amount = PayList.Where(x => x.ID == item).FirstOrDefault().Cash,
                        Date = DateTime.Now
                    };
                    pl.Add(p);
                    db.Payeds.Add(p);
                }
                await db.SaveChangesAsync();

                PersianCalendar pc = new PersianCalendar();
                ExportToExcel(pl.Select(x => new {
                                    ID = x.User.ID,
                                    Name = x.User.Name,
                                    Cash = x.Amount,
                                    Date = new DateTime(pc.GetYear(x.Date), pc.GetMonth(x.Date), pc.GetDayOfMonth(x.Date)).ToString("yyyy/MM/dd").Replace("-","/")
                                }).ToList());

                PayList.RemoveAll(x => x.Pay);
            }
            return RedirectToAction("Index", new RouteValueDictionary(new {page = (int?)1, sortOrder = "" }));
            //RedirectToAction("Index", new RouteValueDictionary(new { controller = "Cash", action = "Index", page = (int?)1, sortOrder = "" }));// (PayList.ToPagedList(1,25));
        }

Veiw:

@using (Html.BeginForm("Index", "Cash", FormMethod.Post, new { @class = "form-horizontal", @style = "direction: rtl;", role = "form" }))
{
    <table class="table text-center pre-scrollable text-right" style="direction:rtl;">
        <thead>
            <tr>
                <th></th>
                <th class="text-center">
                    کد
                </th>
                <th class="text-center">
                    @Html.ActionLink("نام", "Index", new { sortOrder = ViewBag.NameSortParm })
                </th>
                <th class="text-center">
                    شماره تماس
                </th>
                <th class="text-center">
                    میزان وجه نقد(تومان)
                </th>
            </tr>
        </thead>
        @for (int i = 0; i < Model.Count; i++)
        {
            <tr class="text-center">
                <td>
                    @Html.CheckBoxFor(model => model[i].Pay)
                </td>
                <td>
                    @Html.DisplayFor(model => model[i].ID)
                    @Html.HiddenFor(model => model[i].ID)
                </td>
                <td>
                    @Html.DisplayFor(model => model[i].Name)
                    @Html.HiddenFor(model => model[i].Name)
                </td>
                <td>
                    @Html.DisplayFor(model => model[i].PhoneNumber)
                    @Html.HiddenFor(model => model[i].PhoneNumber)
                </td>
                <td>
                    @(Model[i].Cash.ToString("###,0")) تومان
                    @Html.HiddenFor(model => model[i].Cash)
                </td>
            </tr>
        }
    </table>
    <hr />
    @Html.PagedListPager(Model, page => Url.Action("index", new { page }))
    <div>جمع کل : @((ViewBag.total).ToString("###,0")) تومان</div>
    <div>هزینه کل : @((ViewBag.AllCash).ToString("###,0")) تومان</div>
    <hr />
    <input type="submit" value="پرداخت" name="btnPayed" class="btn btn-success" />
}

بعد از اینکه فرم submit  می شود فرم ریدارکت نمی شود و هیچ Error یا Exception هم نمی دهد.