分頁(以汽車表爲例)

時間  2019-11-12
標籤 分頁 汽車 表爲 简体版
原文   原文鏈接

【法一】2015.8.9html

aspx界面：後端

<body>spa

<asp:Repeater ID="Repeater1" runat="server">orm

<div>server

<HeaderTemplate>htm

<ul>ip

</HeaderTemplate>ci

<ItemTemplate>input

<li><%#Eval("Name")%>(<%#("Price")%>)</li>it

</ItemTemplate>

<FooterTemplate>

</ul>

</FooterTemplate>

</div>

後端代碼：

private MyDBDataContext_Context=new MyDBDataContext();

private const int PAGESIZE=3;

public List<Car>GetPagedCar(int pageNO)

{

     var query=_Context.Car.Skip(PAGESIZE*(pageNO-1)).Take(PAGESIZE);

     return query.ToList();

}

public int GetPageCount()

{

    int rowsCount=_Context.Car.Count;//得到總行數

    int pageCount=(int)Math.Ceiling(1.0*(rowsCount/PAGESIZE));//計算總頁數

    return pageCount;

}

protected void Page_Load(object sender,EventArgs e)

{

     int nowPage=1;//頁數從1開始

     if(Request["pageno"]!=null)

    {

          nowPage=Convert.ToInt32(Request["pageno"]);

    }

     List<Car>list=GetPagedCar(nowPage);

     ---List<Car>list=GetPagedCar(1);顯示第一頁數據List<Car>list=GetPagedCar(2);顯示第二頁數據

     //給Repeater數據

     Repeater1.DataSourse=list;

     Repeater1.DataBind();   

    //給上一頁、下一頁數據---加入超連接HyperLink實現翻頁功能

    int pageCount=GetPageCount();

   //控制下一頁連接

    if(pageCount==nowPage)

   {

        linkNext.Enabled=false;

   }

    else

   {

       linkNext.Enabled=true;

       linkNext.NavigateUrl="Default.aspx?pageno="+(nowPage+1).ToString(); 

   }

   //控制上一頁連接

    if(nowPage==1)

   {

       linkPrev.Enabled=false;

   }

    else

    {

        linkPrev.Enabled=true;

        linkPrev.NavigateUrl="Default.aspx?pageno="+(nowPage-1).ToString();---注意：pageno等號先後不能加空格

    }

       //控制首頁連接

       linkFirst.NavigateUrl="Default.aspx?pageno=1"

       //控制尾頁連接

       linkLast.NavigateUrl="Default.aspx?pageno="+pageCount;

}

      //跳轉到某一頁

protected btnGo_Click(object sender,EventArgs e)

{

       int goNo=Convert.ToInt32(txtPageNo.Text);

       if(goNo<1)

       {

              Response.Redirect("Default.aspx")

       }

        else if(goNo<GetPageCount())

        {

               Response.Redirect("Default.aspx?pageno="+GetPageCount());

        }

        else

        {

               Response.Redirect("Default.aspx?pageno="+goNo);

        }

}

【法二】2015.8.18

 part1---不加標註

aspx代碼：

  <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Repeater ID="Repeater1" runat="server">
            <HeaderTemplate><ul></HeaderTemplate>
            <FooterTemplate></ul></FooterTemplate>
            <ItemTemplate>
                <li><%# Eval("Name") %></li>
            </ItemTemplate>
        </asp:Repeater>
    </div>
        <a href="Default.aspx" runat="server" id="lnkPrev">
            <input id="Button1" type="button" value="上一頁" /></a>
        <a href="Default.aspx" runat="server" id="lnkNext">
            <input id="Button2" type="button" value="下一頁" /></a>
</form>
</body>

VS代碼：

public partial class _Default : System.Web.UI.Page
{
    private MyDBDataContext _Context = new MyDBDataContext();
    private const int PAGESIZE = 3;
    private int _PageNo = 1;  //當前的頁號
    //獲取總頁數
    public int GetPageCount()
    {
        //取總行數
        int rowsCount = _Context.Car.Count();
        //算出總頁數
        int pageCount = (int)Math.Ceiling( 1.0*rowsCount / PAGESIZE);

        return pageCount;
    }
    public List<Car> GetPagedCar()
    {
        var query = _Context.Car.Skip(PAGESIZE*(_PageNo-1)).Take(PAGESIZE);
        return query.ToList();
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            if (Request["pn"] != null)
            {
                _PageNo = Convert.ToInt32(Request["pn"]);
            }
            Repeater1.DataSource = GetPagedCar();
            Repeater1.DataBind();

            if (_PageNo == 1)
            {
                lnkPrev.HRef = "Default.aspx?pn=1";
            }
            else
            {
                lnkPrev.HRef = "Default.aspx?pn=" + (_PageNo - 1).ToString();
            }
            if (_PageNo == GetPageCount())
            {
                lnkNext.HRef = "Default.aspx?pn=" + GetPageCount().ToString();
            }
            else
            {
                lnkNext.HRef = "Default.aspx?pn=" + (_PageNo + 1).ToString();
            }

        }
    }
}

part2---加標註

aspx代碼：

<title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
     <asp:Repeater ID="Repeater1" runat="server">
            <HeaderTemplate><ul></HeaderTemplate>
            <FooterTemplate></ul></FooterTemplate>
            <ItemTemplate>
                <li><%# Eval("Name") %></li>
            </ItemTemplate>
        </asp:Repeater>
    </div>
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="上一頁" />
        <asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="下一頁" />
        <asp:DropDownList ID="PageList" runat="server" AutoPostBack="True" OnSelectedIndexChanged="PageList_SelectedIndexChanged">
        </asp:DropDownList>
    &nbsp;一共<asp:Label ID="lblAll" runat="server" Font-Bold="True" ForeColor="Red"></asp:Label>
        頁，當前是第<asp:Label ID="lblNow" runat="server" Font-Bold="True" ForeColor="Red"></asp:Label>
        頁</form>
</body>

VS代碼：

public partial class Default2 : System.Web.UI.Page
{
    private MyDBDataContext _Context = new MyDBDataContext();
    private const int PAGESIZE = 3;
    private int _PageNo = 1;  //當前的頁號
    //獲取總頁數
    public int GetPageCount()
    {
        //取總行數
        int rowsCount = _Context.Car.Count();
        //算出總頁數
        int pageCount = (int)Math.Ceiling(1.0 * rowsCount / PAGESIZE);

        return pageCount;
    }
    public List<Car> GetPagedCar()
    {
        _PageNo = Convert.ToInt32( PageList.SelectedValue);
        var query = _Context.Car.Skip(PAGESIZE * (_PageNo - 1)).Take(PAGESIZE);
        return query.ToList();
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            FillPageList();
            ShowCars();
        }
    }

    private void ShowCars()
    {
        Repeater1.DataSource = GetPagedCar();
        Repeater1.DataBind();

        //給當前頁和一共幾頁賦值
        lblNow.Text = PageList.SelectedValue;
        lblAll.Text = PageList.Items.Count.ToString();
    }

    private void FillPageList()
    {
        PageList.Items.Clear();

        int pageCount = GetPageCount();
        for (int i = 1; i <= pageCount; i++)
        {
            ListItem li = new ListItem(i.ToString(), i.ToString());
            PageList.Items.Add(li);
        }
    }
    protected void PageList_SelectedIndexChanged(object sender, EventArgs e)
    {
        ShowCars();
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (PageList.SelectedIndex == 0)
        {
            return;
        }
        PageList.SelectedIndex--;
        ShowCars();
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        if (PageList.SelectedIndex == GetPageCount() - 1)
        {
            return;
        }

        PageList.SelectedIndex++;
        ShowCars();
    }
}

2015.9.9

汽車表信息分頁

【Home控制器代碼】---添加引用using MvcApplication1.Models;

namespace MvcApplication1.Controllers
{
    public class HomeController : Controller
    {
        private const int PAGESIZE = 5;

        public ActionResult Index(int? id)
        {
            if (id == null)
            {
                id = 1;
            }
            List<Car> list = new CarBF().Select(PAGESIZE,id.Value);//獲取當前頁數據(id表明當前頁頁號)
            int pageCount = new CarBF().GetPageCount(PAGESIZE);//獲取總頁數
            int nextPageNo = id.Value>pageCount?pageCount:id.Value + 1;//計算下一頁頁號
            int prevPageNo = id.Value==1?1:id.Value - 1;//計算上一頁頁號
            //使用ViewBag帶到視圖層去
            ViewBag.NextPageNo = nextPageNo;
            ViewBag.PrevPageNo = prevPageNo;
            ViewBag.PageCount = pageCount;//總頁數
            ViewBag.PageNo = id;//當前頁號
            //下拉列表分頁---下拉列表按鈕代碼
            List<int> listPage = new List<int>();
            for (int i = 1; i <= pageCount; i++)
            {
                listPage.Add(i);
            }
            SelectList pageList = new SelectList(listPage,id);
            ViewBag.PageList = pageList;
            return View(list);
        }
    }
}

【CarBF代碼】

namespace MvcApplication1.Models
{
    public class CarBF
    {
        private MyDBDataContext_Context=new MyDBDataContext();
        //獲取總頁數
        public int GetPageCount(int pageSize)
        {
            int rowsCount = _Context.Car.Count();
            int pageCount = (int)Math.Ceiling(1.0*(rowsCount/pageSize));
            return pageCount;
        }
        //獲取指定頁數據
        public List<Car> Select(int pageSize,int pageNo)
        {
            var query=_Context.Car.Skip(pageSize*(pageNo-1)).Take(pageSize);
            return query.ToList();
        }
    }
}

【Index視圖源】

@using MvcApplication1.Models;
@model List<Car>
@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width">
    <title>Index</title>
</head>
<body>
    <h1>分頁</h1>
    <table border="0" width="100%" cellpadding="5" cellspacing="1" bgcolor="navy">
        <tr style="color:white;text-align:center;font-weight:bold">
           <td>代號</td>
           <td>車型</td>
           <td>系列</td>
           <td>廠商</td>
           <td>價格</td>
        </tr>
        @{
        foreach(Car data in Model)
        {
        <tr bgcolor="white">
            <td>@data.Code</td>
            <td>@data.Name</td>
            <td>@data.Brand1.Brand_Name</td>
            <td>@data.Brand1.Productor.Prod_Name</td>
            <td>@data.Price</td>
        </tr>
        }
        }
    </table>
    @{
        int nowPageNo = (int)ViewBag.PageNo;
        int nextPageNo = (int)ViewBag.PageNo + 1;
        if(nowPageNo==new CarBF().GetPageCount(5))
        {
            nextPageNo = nowPageNo;
        }
        int prevPageNo = (int)ViewBag.PageNo - 1;
        if(nowPageNo==1)
        {
            prevPageNo = 1;
        }
     }
    @Html.ActionLink("首頁","Index","Home","new{id=1}")
    @Html.ActionLink("下一頁","Index","Home","{id=(int)ViewBag.NextPageNo}",null)
    @Html.ActionLink("上一頁","Index","Home","{id=(int)ViewBag.PrevPageNo}",null)
    @Html.ActionLink("尾頁","Index","Home","new{id=(int)ViewBag.PageCount")
    &nbsp;&nbsp;
    <div style="display:inline-block">
    @using(Html.BeginForm("Index","Home"))
    {
    @:轉第@Html.TextBox("id",null,new{size=2})頁<input type="submit" value="GO"/>---加GO轉頁按鈕
    }
    </div>    一共@ViewBag.PageCount頁,當前是第@ViewBag.PageNo頁---常見頁數顯示
</body>

【轉頁部分還可寫成】

<div style="display:inline-block">
@using(Html.BeginForm("Index","Home"))
{
    @:轉第@Html.DropDownList("id",(SelectList)ViewBag.PageList)頁<input type="submit" value="GO"/>---加GO轉頁按鈕
}
</div>  

或者

<div style="display:inline-block">
@using (Html.BeginForm("Index", "Home", FormMethod.Post, new {id="form2"}))
{
    @:轉第@Html.DropDownList("id",(SelectList)ViewBag.PageList,new{onchange="form2.submit()"})頁<input type="submit" value="GO"/>---加GO轉頁按鈕
}
</div>  

或者

<div style="display:inline-block">@using (Html.BeginForm("Index", "Home", FormMethod.Post, new {id="form2"})){    @:轉第@Html.DropDownList("id",(SelectList)ViewBag.PageList,new{})頁<span onclick="form2.submit()"></span>}</div>  

相關文章
相關標籤/搜索
每日一句
    每一个你不满意的现在，都有一个你没有努力的曾经。
本站公眾號
   歡迎關注本站公眾號,獲取更多信息
聯繫我們 最近搜索 最新文章 沪ICP备13005482号-10 MyBatis教程 SQL 教程 MySQL教程 Java 教程 Thymeleaf 教程 Hibernate教程 Spring教程 Redis教程