控制器端代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MvcApplication1.Models;
namespace MvcApplication1.Controllers
{
public class PagedCarController : Controller
{
private const int PAGESIZE = 3;
public ActionResult Index(int id)
{
int pageCount =new CarBF().GetPageCount(PAGESIZE);//路由中定义了初始id=1
ViewBag.PageNo = id;
ViewBag.PageCount = pageCount;
List<int> pagelist = new List<int>();
for (int i = 1; i <= pageCount; i++)
{
pagelist.Add(i);//生成下拉列表的页码
}
SelectList selectList = new SelectList(pagelist,id);//(显示的内容，选中的内容id)
ViewBag.PageList = selectList;
List<Car> list = new CarBF().Select(PAGESIZE, id);//每页显示3条
return View(list);
}
}
}
视图端代码：
@using MvcApplication1.Models;
@model List<Car>
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
<script language="javascript">
function dochange() {
var s = document.getElementById("pageid").value;
//var str = "new {id="+s+"}";
window.location.href = ("/PagedCar/Index/" + s);//相当于执行了控制器下的Index动作，并将s当作id传入视图中
}
</script>
</head>
<body>
<div>
<ul>
@foreach( Car data in Model ){
<li>@data.Name</li>
}
</ul>
@{
int pageCount = (int)ViewBag.PageCount;
int nowPage = (int)ViewBag.PageNo;
int prevPage = nowPage - 1;
int nextPage = nowPage + 1;
}
@Html.ActionLink("首页", "Index", "PagedCar", new { id=1},null)
@Html.ActionLink("上一页", "Index", "PagedCar", new { id = prevPage }, new { onclick = (prevPage <= 0 ? "return false" : "return true") })
@Html.ActionLink("下一页", "Index", "PagedCar", new { id = nextPage }, new { onclick=(nextPage > pageCount?"return false;":"return true;" )})
@Html.ActionLink("尾页", "Index", "PagedCar", new { id = pageCount },null)
转向 @Html.DropDownList("pageid", ViewBag.PageList as SelectList, new { onchange="dochange()"}) 页
</div>
</body>
</html>
Model层方法代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace MvcApplication1.Models
{
public class CarBF
{
private MyDBDataContext _Context = new MyDBDataContext();
public List<Car> Select(int pageSize,int pageNo) //pageNo从1开始算的（初始页面），显示pageNo页
{
var query = _Context.Car.Skip(pageSize * (pageNo - 1)).Take(pageSize);//skip跳过(当前页-1)*每页显示几条(行)，再take取出当前页显示的条数
return query.ToList();
}
public int GetPageCount(int pageSize)//计算总共有多少页
{
int rowsCount = _Context.Car.Count();//计算一共有多少行
int pageCount = (int)Math.Ceiling( 1.0* rowsCount / pageSize);//总行数÷每页显示的个数pageSize为总共多少页，×1.0为防止：例如：2.4int时为2，再ceiling2.4=3
return pageCount;
}
}
}
时间： 2024-07-28 22:22:00