ASP.NET

[AllowAnonymous]
        public ActionResult IndexDT(int? page, string sortOrder, string currentFilter, string searchString)
        {
            ViewBag.CurrentSort = sortOrder;
            ViewBag.NameSortParm = String.IsNullOrEmpty(sortOrder) ? "TenSanPham desc" : "";
            ViewBag.CostSortParm = sortOrder == "Gia" ? "Gia desc" : "Gia";
            if (Request.HttpMethod == "GET")
            {
                searchString = currentFilter;
            }
            else
            {
                page = 1;
            }
            ViewBag.CurrentFilter = searchString;
            int pageSize = 2;
            int pageNumber = (page ?? 1);
            return View(spBLL.ListDT(searchString, sortOrder).ToPagedList(pageNumber, pageSize));
        }

@model PagedList.IPagedList<ComputerBLL.SanPham>
@{
    ViewBag.Title = "IndexDT";
}
<script src="../../Scripts/jquery-1.7.1.js" type="text/javascript"></script>
<script src="../../Scripts/jquery-ui-1.8.20.js" type="text/javascript"></script>
<script src="../../Scripts/jquery.unobtrusive-ajax.js" type="text/javascript"></script>
<script type="text/javascript">
    $(document).ready(function () {
        $("#timKiemNangCao").click(function () {
            $("#search").after('');
        });
    });

    function TimNangCao() {
        var sanpham = new Object();
        sanpham.TenSanPham = $("#name").val();
        $.ajax({
            type: "POST",
            url: '../../SanPham/TimKiemNangCao',
            data: JSON.stringify(sanpham),
            contentType: 'application/json; charset=utf-8',
            success: function (data) {
                $(document).html(data);
            },
            error: function (xhr) {
                alert(xhr.toString());
            }
        });
    }
</script>
<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "CreateDT")
</p>

@using (Html.BeginForm())
{
    <p id="search">
        Find by name: @Html.TextBox("SearchString", ViewBag.CurrentFilter as string) &nbsp;
        <input type="submit" value="Search" />
        <a style="color:Blue; cursor:pointer" id="timKiemNangCao">Tìm kiếm nâng cao</a>
    </p>
    <table style="text-align:left">
        <tr><td><span>Tên sản phẩm</span></td><td><input type="text" id="name"/></td></tr>
        <tr><td><span>Giá</span></td><td><input type="text" style="width: 100px"/>đến
        <input type="text" style="width: 100px"/></td></tr>
        <tr><td><span>Hệ điều hành</span></td><td></td></tr>
        <tr><td><span>Nhà sản xuất</span></td></tr>
        <tr><td><input type="button" onclick="TimNangCao()" value="Tìm nâng cao"/></td></tr> 
    </table>
}


<div class="portfolio_1_4">
    <ul id="list">
        @foreach (var item in Model)
        {
            if (item.ChiTietDT != null)
            {
            <!-- START PORTFOLIO COLUMN #1 -->
            <li id="id-1" class="app"><span class="image"><a href= "@item.HinhAnh" data-rel="prettyPhoto" class="img-thumb">
                <img class="portfolio_image" src="@item.HinhAnh" alt="" /></a> </span><span class="title">@Html.ActionLink(item.TenSanPham, "Details", new { id = item.MaSanPham })</span>
                <span class="description">@Html.DisplayFor(modelItem => item.Gia)<br />
                    Đặt hàng<br />
                    @Html.ActionLink("Edit", "Edit", new { id = item.MaSanPham }) |
                    @Html.ActionLink("Details", "Details", new { id = item.MaSanPham }) |
                    @Html.ActionLink("Delete", "Delete", new { id = item.MaSanPham })
                </span><span class="clear padding15"></span></li>
            <!-- END PORTFOLIO COLUMN #1 -->
                
            }
        }
    </ul>
    <div class="clear">
    </div>
</div>

<div>
    Page @(Model.PageCount < Model.PageNumber ? 0 : Model.PageNumber)
    of @Model.PageCount
     &nbsp;
    @if (Model.HasPreviousPage)
    {
        @Html.ActionLink("<<", "IndexDT", new { page = 1, sortOrder = ViewBag.CurrentSort, currentFilter=ViewBag.CurrentFilter  })
        @Html.Raw(" ");
        @Html.ActionLink("< Prev", "IndexDT", new { page = Model.PageNumber - 1, sortOrder = ViewBag.CurrentSort, currentFilter=ViewBag.CurrentFilter  })
    }
    else
    {
        @:<<
        @Html.Raw(" ");
        @:< Prev
    }
     &nbsp;
    @if (Model.HasNextPage)
    {
        @Html.ActionLink("Next >", "IndexDT", new { page = Model.PageNumber + 1, sortOrder = ViewBag.CurrentSort, currentFilter=ViewBag.CurrentFilter  })
        @Html.Raw(" ");
        @Html.ActionLink(">>", "IndexDT", new { page = Model.PageCount, sortOrder = ViewBag.CurrentSort, currentFilter=ViewBag.CurrentFilter  })
    }
    else
    {
        @:Next >
        @Html.Raw(" ")
        @:>>
    }
</div>