MVC 分页查询

LINQ 表结构

Models

public class CarBF
    {
        private MyDbDataContext Context = new MyDbDataContext();

        //每一页
        public List<Car> Select(int PageSize,int PageNo)
        {
            //分页查询
            //select top 条数 *from student where sno not in (select top 条数*(第几页-1) sno from student)
            //比如每页显示两行，第一页直接取前两行，第二页的就是2*(2-1)屏蔽掉，取剩下的前两行，以此类推
            var query = Context.Car.Skip(PageSize*(PageNo-1)).Take(PageSize);
            return query.ToList();
        }

        //总共多少页
        public int Page(int PageSize)
        {
            int rowsCount = Context.Car.Count();
            int Pages = (int)Math.Ceiling( 1.0* rowsCount / PageSize);
            return Pages;
        }
    }

HomeController

 public class HomeController : Controller
    {
        //
        // GET: /Home/

        //声明默认显示每页行数是3
        public const int PageSize = 3;

        public ActionResult Index(int id)//参数为第几页
        {
            //当前页数
            ViewBag.PageNo = id;
            //查询第几页显示的数据
            List<Car> listCar = new CarBF().Select(PageSize,id);
            //总共的页数
            int GetPages = new CarBF().Page(PageSize);
            ViewBag.Pages = GetPages;

            //为下拉列表造SelectList
            List<int> listint = new List<int>();
            for (int i = 1; i <= GetPages; i++)
            {
                listint.Add(i);
            }
            SelectList selectlist = new SelectList(listint,id);
            ViewBag.selectli = selectlist;

            return View(listCar);
        }

    }

Index

@using MvcApplication2.Models;
@model List<Car>
@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
    <style>
        .tb {
        text-align:center;
        background-color:#ffffcc;
        }
    </style>
    <script type="text/javascript">
        function change()
        {
            var s = document.getElementById("page").value;
            window.location.href = "/Home/Index/"+ s;
        }
    </script>
</head>
<body>
    <div>
        <table class="tb" width="100%" cellspacing="1" cellpadding="4" border="0">
            @{
                foreach (Car c in Model)
                {
                <tr>
                    <td>@c.Name</td>
                </tr>
                }
            }
            <tr>
                <td>
                    @{
                        int Pages = (int)ViewBag.Pages;
                        int NextPage=(int)ViewBag.PageNo+1;
                        int PrePage=(int)ViewBag.PageNo-1;
                        
                        @Html.ActionLink("首页", "Index", "Home", new { id=1 },null)
                        @Html.ActionLink("上一页", "Index", "Home", new { id = PrePage }, new { onclick=(PrePage<=0 ? "return false" : "return true") })
                        @Html.ActionLink("下一页", "Index", "Home", new { id = NextPage }, new { onclick=(NextPage<=Pages ? "return true" : "return false") })
                        @Html.ActionLink("尾页", "Index", "Home", new { id=Pages },null)                        
                        for (int i = 1; i <= Pages; i++)
                        {
                        <a href="~/Home/Index/@i">@i</a>

                        }
                        @Html.DropDownList("page", ViewBag.selectli as SelectList, new { onchange="change()" })                        
                    }
                </td>
            </tr>
        </table>
    </div>
</body>
</html>

运行效果

首页跳转到第一页 尾页跳转到最后一个，下拉列表页数会跟随跳转到第几页而改变

 

posted @ 2015-07-14 21:21  九省巡按  阅读(399)  评论(0)  编辑  收藏  举报