webform 分页

界面：

 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

 <!DOCTYPE html>

 <html xmlns="http://www.w3.org/1999/xhtml">

 <head runat="server">

     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

     <title></title>

 </head>

 <body>

     <form id="form1" runat="server">

         <div>

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

                 <HeaderTemplate>

                     <table style="background-color: blue; width: 100%; text-align:center">

                         <thead>

                             <tr style="color: white;">

                                 <td>编号</td>

                                 <td>名称</td>

                                 <td>品牌</td>

                                 <td>上市时间</td>

                                 <td>油耗</td>

                                 <td>动力</td>

                                 <td>排量</td>

                                 <td>价格</td>

                                 <td>图片</td>

                             </tr>

                         </thead>

                         <tbody>

                 </HeaderTemplate>

                 <ItemTemplate>

                     <tr style="background-color: #808080">

                         <td><%#Eval("Code") %></td>

                         <td><%#Eval("Name") %></td>

                         <td><%#Eval("Brand") %></td>

                         <td><%#Eval("Time") %></td>

                         <td><%#Eval("Oil") %></td>

                         <td><%#Eval("Power") %></td>

                         <td><%#Eval("Exhaust") %></td>

                         <td><%#Eval("Price") %></td>

                         <td><%#Eval("Pic") %></td>

                     </tr>

                 </ItemTemplate>

                 <FooterTemplate>

                     </tbody>

             </table>

                 </FooterTemplate>

             </asp:Repeater>

             <div style="width: 50%; position: relative; float: left; height: 25px; line-height: 25px; text-indent: 20px;">

                 共

                 <asp:Label ID="Label_Sum" runat="server" Text="Label"></asp:Label>

                 条记录，共

                 <asp:Label ID="Label_Maxpage" runat="server" Text="Label"></asp:Label>

                 页，第

                 <asp:Label ID="Label_Nowpage" runat="server" Text="Label"></asp:Label>

                 页|每页

                 <asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="true" ></asp:DropDownList>

                 条记录

             </div>

             <div style="width: 30%; position: relative; float: right; height: 25px; line-height: 25px;">

                 <asp:LinkButton ID="btn_First" runat="server">首页</asp:LinkButton>&nbsp

                 <asp:LinkButton ID="btn_Prev" runat="server">上一页</asp:LinkButton>&nbsp

                 <asp:LinkButton ID="btn_Next" runat="server">下一页</asp:LinkButton>&nbsp

                 <asp:LinkButton ID="btn_Last" runat="server">尾页</asp:LinkButton>&nbsp

                 <asp:DropDownList ID="DropDownList1" runat="server"></asp:DropDownList>

                 <asp:Button ID="Button1" runat="server" Text="跳转" />

             </div>

         </div>

     </form>

 </body>

 </html>

界面Default.aspx

后台：

 using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Web;

 /// <summary>

 /// Car 的摘要说明

 /// </summary>

 public class Car

 {

     public Car()

     {

         //

         // TODO: 在此处添加构造函数逻辑

         //

     }

     public string Code { get; set; }

     public string Name { get; set; }

     public string Brand { get; set; }

     public DateTime Time { get; set; }

     public decimal Oil { get; set; }

     public int Power { get; set; }

     public decimal Exhaust { get; set; }

     public decimal Price { get; set; }

     public string Pic { get; set; }

 }

Car

 using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Web;

 using System.Data.SqlClient;

 /// <summary>

 /// CarData 的摘要说明

 /// </summary>

 public class CarData

 {

     SqlConnection conn = null;

     SqlCommand cmd = null;

     public CarData()

     {

         conn = new SqlConnection("server=.;database=mydb;user=sa;pwd=123");

         cmd = conn.CreateCommand();

     }

     public List<Car> Select()

     {

         List<Car> clist = new List<Car>();

         cmd.CommandText = "select *from Car";

         conn.Open();

         SqlDataReader dr = cmd.ExecuteReader();

         if (dr.HasRows)

         {

             while (dr.Read())

             {

                 Car c = new Car();

                 c.Code = dr[].ToString();

                 c.Name = dr[].ToString();

                 c.Brand = dr[].ToString();

                 c.Time = Convert.ToDateTime(dr[]);

                 c.Oil = Convert.ToDecimal(dr[]);

                 c.Power = Convert.ToInt32(dr[]);

                 c.Exhaust = Convert.ToInt32(dr[]);

                 c.Price = Convert.ToDecimal(dr[]);

                 c.Pic = dr[].ToString();

                 clist.Add(c);

             }

         }

         conn.Close();

         return clist;

     }

     public List<Car> Select(int count,int nowpage)

     {

         List<Car> clist = new List<Car>();

         cmd.CommandText = "select top "+count+" *from Car where Code not in (select top "+((nowpage-)*count)+" Code from Car) ";

         conn.Open();

         SqlDataReader dr = cmd.ExecuteReader();

         if (dr.HasRows)

         {

             while (dr.Read())

             {

                 Car c = new Car();

                 c.Code = dr[].ToString();

                 c.Name = dr[].ToString();

                 c.Brand = dr[].ToString();

                 c.Time = Convert.ToDateTime(dr[]);

                 c.Oil = Convert.ToDecimal(dr[]);

                 c.Power = Convert.ToInt32(dr[]);

                 c.Exhaust = Convert.ToInt32(dr[]);

                 c.Price = Convert.ToDecimal(dr[]);

                 c.Pic = dr[].ToString();

                 clist.Add(c);

             }

         }

         conn.Close();

         return clist;

     }

 }

CarData

 using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Web;

 using System.Web.UI;

 using System.Web.UI.WebControls;

 public partial class _Default : System.Web.UI.Page

 {

     protected void Page_Load(object sender, EventArgs e)

     {

         if (!IsPostBack)

         {

             DropDownList2.Items.Clear();

             for (int i = ; i <= Sum(); i++)

             {

                 DropDownList2.Items.Add(new ListItem(i.ToString(), i.ToString()));

             }

             DropDownList2.SelectedValue = "";//默认每页五条

             Change();

         }

         btn_First.Click += btn_First_Click;//首页

         btn_Prev.Click += btn_Prev_Click;//上一页

         btn_Next.Click += btn_Next_Click;//下一页

         btn_Last.Click += btn_Last_Click;//尾页

         Button1.Click += Button1_Click;//跳转按钮

         DropDownList2.SelectedIndexChanged += DropDownList2_SelectedIndexChanged;//每页数据条数发生改变

     }

     //每页数据条数发生改变时执行

     private void Change()

     {

         int count = Convert.ToInt32(DropDownList2.SelectedValue);//每页的数据条数

         Label_Sum.Text = Sum().ToString();//总数据条数

         Label_Maxpage.Text = MaxPage().ToString();//总页数

         Label_Nowpage.Text = "";//当前页

         Repeater1.DataSource = new CarData().Select(count, );

         Repeater1.DataBind();

         DropDownList1.Items.Clear();

         for (int i = ; i <= MaxPage(); i++)

         {

             DropDownList1.Items.Add(new ListItem(i.ToString(), i.ToString()));

         }

         btn_First.Enabled = false;

         btn_Prev.Enabled = false;

         btn_Next.Enabled = true;

         btn_Last.Enabled = true;

     }

     //每页数据条数发生改变

     void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)

     {

         Change();

         if (DropDownList2.SelectedValue == "")

         {

             btn_Next.Enabled = false;

             btn_Last.Enabled = false;

         }

     }

     //跳转按钮

     void Button1_Click(object sender, EventArgs e)

     {

         int count = Convert.ToInt32(DropDownList2.SelectedValue);//每页的数据条数

         //按照页数获取绑定数据

         Repeater1.DataSource = new CarData().Select(count,Convert.ToInt32( DropDownList1.SelectedValue));

         Repeater1.DataBind();

         //修改显示页数

         Label_Nowpage.Text = DropDownList1.SelectedValue;

         if (Convert.ToInt32(Label_Nowpage.Text) <= )//若为首页禁用上一页和首页按钮

         {

             btn_First.Enabled = false;

             btn_Prev.Enabled = false;

             btn_Next.Enabled = true;

             btn_Last.Enabled = true;

         }

         if (Convert.ToInt32(Label_Nowpage.Text) >= MaxPage())//若为最后一页禁用下一页和尾页按钮

         {

             btn_Next.Enabled = false;

             btn_Last.Enabled = false;

             btn_First.Enabled = true;

             btn_Prev.Enabled = true;

         }

     }

     //首页

     void btn_First_Click(object sender, EventArgs e)

     {

         int count = Convert.ToInt32(DropDownList2.SelectedValue);//每页的数据条数

         //按照页数获取绑定数据

         Repeater1.DataSource = new CarData().Select(count, );

         Repeater1.DataBind();

         //修改显示页数

         Label_Nowpage.Text = "";

         //当前为首页禁用上一页和首页按钮

         btn_First.Enabled = false;

         btn_Prev.Enabled = false;

         btn_Next.Enabled = true;

         btn_Last.Enabled = true;

     }

     //上一页

     void btn_Prev_Click(object sender, EventArgs e)

     {

         int count = Convert.ToInt32(DropDownList2.SelectedValue);//每页的数据条数

         //获取当前页，计算上一页页数

         int nextpage = Convert.ToInt32(Label_Nowpage.Text) - ;

         //按照页数获取绑定数据

         Repeater1.DataSource = new CarData().Select(count, nextpage);

         Repeater1.DataBind();

         //修改显示页数

         Label_Nowpage.Text = nextpage.ToString();

         if (nextpage <= )//若为首页禁用上一页和首页按钮

         {

             btn_First.Enabled = false;

             btn_Prev.Enabled = false;

         }

         btn_Next.Enabled = true;

         btn_Last.Enabled = true;

     }

     //下一页

     void btn_Next_Click(object sender, EventArgs e)

     {

         int count = Convert.ToInt32(DropDownList2.SelectedValue);//每页的数据条数

         //获取当前页，计算下一页页数

         int nextpage = Convert.ToInt32(Label_Nowpage.Text) + ;

         //按照页数获取绑定数据

         Repeater1.DataSource = new CarData().Select(count, nextpage);

         Repeater1.DataBind();

         //修改显示页数

         Label_Nowpage.Text = nextpage.ToString();

         if (nextpage >= MaxPage())//若为最后一页禁用下一页和尾页按钮

         {

             btn_Next.Enabled = false;

             btn_Last.Enabled = false;

         }

         btn_First.Enabled = true;

         btn_Prev.Enabled = true;

     }

     //尾页

     void btn_Last_Click(object sender, EventArgs e)

     {

         int count = Convert.ToInt32(DropDownList2.SelectedValue);//每页的数据条数

         //按照页数获取绑定数据

         Repeater1.DataSource = new CarData().Select(count, MaxPage());

         Repeater1.DataBind();

         //修改显示页数

         Label_Nowpage.Text = MaxPage().ToString();

         //若为最后一页禁用下一页和尾页按钮

         btn_Next.Enabled = false;

         btn_Last.Enabled = false;

         btn_First.Enabled = true;

         btn_Prev.Enabled = true;

     }

     //总的数据条数

     public int Sum()

     {

         List<Car> clist = new CarData().Select();

         int a = clist.Count;

         return a;

     }

     //总页数

     public int MaxPage()

     {

         int count = Convert.ToInt32(DropDownList2.SelectedValue);//每页的数据条数

         List<Car> clist = new CarData().Select();

         int a = clist.Count;

         int end = Convert.ToInt32(Math.Ceiling(a / (count * 1.0)));

         return end;

     }

 }

Default.aspx.cs

巴特西

webform 分页

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