ASP.net分页实现

  1 public partial class _Default : System.Web.UI.Page
  2 {
  3     private mydbDataContext _context = new mydbDataContext();//建立连接
  4     private const int PAGESIZE = 3;//定义每页大小为三个
  5 
  6     //取得分页信息************重要***********
  7     public List<Car> GetPageCar(int pageNo)
  8     {
  9         var query = _context.Car.Skip(PAGESIZE * (pageNo - 1)).Take(PAGESIZE);
 10         return query.ToList();
 11     }
 12 
 13     //获取总页数************重要***********
 14     public int GetPageCount()
 15     {
 16         int rowsCount = _context.Car.Count();//获得总行数
 17         int pageCount = (int)Math.Ceiling(1.0 * rowsCount / PAGESIZE);
 18         return pageCount;
 19     }
 20 
 21 
 22     protected void Page_Load(object sender, EventArgs e)
 23     {
 24         int nowPage =1;//初始页为1
 25         if (Request["pageno"]!=null)//第一次打开pageno为空,当不为空的时候就给nowpage赋值
 26         {
 27             nowPage = Convert.ToInt32(Request["pageno"]);
 28         }
 29         //显示列表中的信息
 30         ShowPageCars(nowPage);
 31 
 32         //显示上一页下一页的数据,首页和尾页
 33         ShowPrevNextLink(nowPage);
 34        
 35     }
 36 
 37     //显示上一页下一页首页尾页信息
 38     private void ShowPrevNextLink(int nowPage)
 39     {
 40         //给上一页,下一页数据
 41         int pageCount = GetPageCount();
 42         //控制下一页连接
 43         if (nowPage == pageCount)
 44         {
 45             linkNext.Enabled = false;
 46             linkLast.Enabled = false;
 47         }
 48         else
 49         {
 50             linkNext.Enabled = true;
 51             linkLast.Enabled = true;
 52             linkNext.NavigateUrl = "Default.aspx?pageno=" + (nowPage + 1).ToString();
 53             //控制尾页
 54             linkLast.NavigateUrl = "Default.aspx?pageno=" + pageCount;
 55         }
 56         //控制上一页连接
 57         if (nowPage == 1)
 58         {
 59             linkPrev.Enabled = false;
 60             linkFrist.Enabled = false;
 61         }
 62         else
 63         {
 64             linkPrev.Enabled = true;
 65             linkFrist.Enabled = true;
 66             linkPrev.NavigateUrl = "Default.aspx?pageno=" + (nowPage - 1).ToString();
 67             //控制首页连接
 68             linkFrist.NavigateUrl = "Default.aspx?pageno=1";
 69         }
 70     }
 71 
 72     //显示列表信息
 73     private void ShowPageCars(int nowPage)
 74     {
 75         List<Car> list = GetPageCar(nowPage);
 76         //给Repeater数据
 77         Repeater1.DataSource = list;
 78         Repeater1.DataBind();
 79     }
 80 
 81     //跳转
 82     protected void btnGo_Click(object sender, EventArgs e)
 83     {
 84         if (txtPageNO.Text == "")
 85         {
 86 
 87         }
 88         else
 89         {
 90             int goNo = Convert.ToInt32(txtPageNO.Text);
 91             if (goNo < 1)
 92             {
 93                 Response.Redirect("Default.aspx");
 94             }
 95             else if (goNo > GetPageCount())
 96             {
 97                 Response.Redirect("Default.aspx?pageno=" + GetPageCount());
 98             }
 99             else
100             {
101                 Response.Redirect("Default.aspx?pageno=" + goNo);
102             }
103         }
104     }
105 }