【Asp.Net WebFrom】分页

Asp.Net WebForm 分页

一、前言

Asp.Net WebForm 内置的DataPager让人十分蛋疼

本文使用的分页控件是第三方分页控件 AspNetPager，下载地址：

链接: http://pan.baidu.com/s/1eQJ2HR8 密码: aost

相关属性及其效果图：

二、使用第三方分页控件 AspNetPager

第一步：显示未分页时的数据

　　前端代码：

　　　　注意：将ListView控件的EnableViewState=”False”。说明即使是EnableViewState=”False”，不影响分页的实现。

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ListView分页AspNetPager第三方控件.aspx.cs" Inherits="Focus.Asp.WebForm.Czbk.Focus.ListView.ListView分页AspNetPager第三方控件" %><!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:ListView ID="ListView1" runat="server" EnableViewState="False">
                <%--asp.net 3.5的LayoutTemplate是必须的，asp.net 4.0的LayoutTemplate不是必须的--%>
                <LayoutTemplate>
                    <div style="border:solid seagreen;">
                        <table>
                            <thead>
                                <tr>
                                    <th>Id</th>
                                    <th>种类</th>
                                </tr>
                            </thead>
                            <tbody>
                             <%--显示写LayoutTemplate时必须有一个占位符（可以是任意类型），
                                 但是id必须是itemPlaceholder，项占位符控件还必须指定 runat="server"。--%>
                                 <asp:PlaceHolder runat="server" ID="itemPlaceholder"></asp:PlaceHolder>
                            </tbody>
                        </table>
                    </div>
                </LayoutTemplate>
                <ItemTemplate>
                    <div>
                        <tr>
                            <td><asp:Label runat="server"><%#Eval("Id") %></asp:Label></td>
                            <td><asp:Label runat="server"><%#Eval("Kind") %></asp:Label></td>
                        </tr>
                    </div>
                </ItemTemplate>
                <AlternatingItemTemplate>
                    <div >
                        <tr>
                            <td><asp:Label runat="server"><%#Eval("Id") %></asp:Label></td>
                            <td><asp:Label runat="server"><%#Eval("Kind") %></asp:Label></td>
                        </tr>
                    </div>
                </AlternatingItemTemplate>
                <EmptyDataTemplate>
                    抱歉，没有数据
                </EmptyDataTemplate>
            </asp:ListView>    </div>
    </form>
</body>
</html>

　　后台代码绑定数据：

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                BindData();
            }
        }        private void BindData()
        {
            List<Electronics> dataSource = DataSourceTemplete.GetElectronics();            this.ListView1.DataSource = dataSource;
            this.ListView1.DataBind();        }

　　其中用静态类DataSourceTemplete来模拟数据源，数据源的结构类是Electronics，它们的代码如下：

　　DataSourceTemplete.cs:

using System;
using System.Collections.Generic;
using System.Data.Entity.Migrations.Model;
using System.Linq;
using System.Threading;
using System.Web;
using Focus.Asp.WebForm.Czbk.Focus.ValidateControl;namespace Focus.Asp.WebForm.Czbk.Focus.Helper
{
    public static class DataSourceTemplete
    {
        private static List<Electronics> electronics = new List<Electronics>()
                {
                    //new Electronics{Id = -1, Kind="--请选择--"},
                    new Electronics{Id = , Kind="电脑"},
                    new Electronics{Id = , Kind="手机"},
                    new Electronics{Id = , Kind="平板电脑"},
                    new Electronics{Id = , Kind="一体机"},
                    new Electronics{Id = , Kind="路由器"},
                    new Electronics{Id = , Kind="吹风机"},
                    new Electronics{Id = , Kind="CPU"},
                    new Electronics{Id = , Kind="散热器"},
                    new Electronics{Id = , Kind="主板"},
                    new Electronics{Id = , Kind="内存条"},                };        public static List<Electronics> GetElectronics()
        {
            return electronics;
        }        public static void Add(Electronics electronic)
        {
            electronics.Add(electronic);
        }        public static void Delete(int id)
        {
            var toDel = electronics.First(i => i.Id == id);
            electronics.Remove(toDel);
        }        public static void Edit(Electronics electronic)
        {
            var toEdit = electronics.First(i => i.Id == electronic.Id);
            toEdit.Kind = electronic.Kind;
        }        public static Electronics Get(int id)
        {
            return electronics.First(i => i.Id == id);
        }
    }
}

　　Electronics.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;namespace Focus.Asp.WebForm.Czbk.Focus.ValidateControl
{
    public class Electronics
    {
        public int Id { get; set; }
        public string Kind { get; set; }
    }
}

　　第二步：添加分页控件

　　先在项目中引入AspNetPager.dll;

　　前端代码中添加添加分页控件,

<%@ Register Assembly="AspNetPager" Namespace="Wuqi.Webdiyer" TagPrefix="aspNetPager" %>....
<form id="form1" runat="server">
    <div>
        <asp:ListView ID="ListView1" runat="server" EnableViewState="False">
        .....
            </asp:ListView>
            <div>
                <aspNetPager:AspNetPager runat="server" ID="AspNetPager1"
                    AlwaysShow="True"
                    OnPageChanged="AspNetPager1_OnPageChanged"
                    UrlPaging="True"
                    NumbericButtonCount ="5"
                    NumericButtonTextFormatString="[{0}]"
                    ShowCustomInfoSection="Right"
                    ShowPrevNext="True"
                    ShowPageIndex="True"
                    ShowFirstLast="True"
                    FirstPageText="首页"
                    LastPageText="末页"
                    PrevPageText="上一页"
                    NextPageText="下一页"
                    ShowNavigationToolTip="True"
                    TextBeforeInputBox="第"
                    ShowInputBox='Always'
                    TextAfterInputBox="页"
                    SubmitButtonText="确认">                </aspNetPager:AspNetPager>
            </div>
    </div>
    </form>

　　第三步：为分页控件添加OnPageChanged事件处理：

　　其中，第一步中BindData();也相应的添加相关代码，以实现分页相关逻辑。　　

　　后台代码：

        private int pageIndex;
        private int pageSize = Convert.ToInt32(ConfigurationManager.AppSettings["pageSize"]);
        private int totalCount;........protected void AspNetPager1_OnPageChanged(object sender, EventArgs e)
        {
            BindData();            /*设置分页控件属性*/
            this.AspNetPager1.CustomInfoHTML = "记录总数：<b>" + AspNetPager1.RecordCount.ToString() + "</b>";
            this.AspNetPager1.CustomInfoHTML += " 总页数：<b>" + AspNetPager1.PageCount.ToString() + "</b>";
            this.AspNetPager1.CustomInfoHTML += " 当前页：<font color=\"red\"><b>" + AspNetPager1.CurrentPageIndex.ToString() + "</b></font>";
        }        private void BindData()
        {
            List<Electronics> dataSource = DataSourceTemplete.GetElectronics();            pageIndex = this.AspNetPager1.CurrentPageIndex;
            totalCount = DataSourceTemplete.GetElectronics().Count;            this.ListView1.DataSource = dataSource.Skip((pageIndex-1) * pageSize)
                .Take(pageSize)
                .ToList();
            this.ListView1.DataBind();            /*设置分页控件属性*/
            this.AspNetPager1.RecordCount = totalCount;//所有数据的总数，必须设置该值。
            this.AspNetPager1.PageSize = pageSize;
        }

其中，在web.config文件中配置PageSize（每页显示多少项数据）：

<configuration>
  <appSettings>
    <add key="pageSize" value=""/>
  </appSettings>

　　并通过如下代码获取：

private int pageSize = Convert.ToInt32(ConfigurationManager.AppSettings["pageSize"]);

页面完整代码：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ListView分页AspNetPager第三方控件.aspx.cs" Inherits="Focus.Asp.WebForm.Czbk.Focus.ListView.ListView分页AspNetPager第三方控件" %>
<%@ Register Assembly="AspNetPager" Namespace="Wuqi.Webdiyer" TagPrefix="aspNetPager" %><!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:ListView ID="ListView1" runat="server" EnableViewState="False">
                <%--asp.net 3.5的LayoutTemplate是必须的，asp.net 4.0的LayoutTemplate不是必须的--%>
                <LayoutTemplate>
                    <div style="border:solid seagreen;">
                        <table>
                            <thead>
                                <tr>
                                    <th>Id</th>
                                    <th>种类</th>
                                </tr>
                            </thead>
                            <tbody>
                             <%--显示写LayoutTemplate时必须有一个占位符（可以是任意类型），
                                 但是id必须是itemPlaceholder，项占位符控件还必须指定 runat="server"。--%>
                                 <asp:PlaceHolder runat="server" ID="itemPlaceholder"></asp:PlaceHolder>
                            </tbody>
                        </table>
                    </div>
                </LayoutTemplate>
                <ItemTemplate>
                    <div>
                        <tr>
                            <td><asp:Label runat="server"><%#Eval("Id") %></asp:Label></td>
                            <td><asp:Label runat="server"><%#Eval("Kind") %></asp:Label></td>
                        </tr>
                    </div>
                </ItemTemplate>
                <AlternatingItemTemplate>
                    <div >
                        <tr>
                            <td><asp:Label runat="server"><%#Eval("Id") %></asp:Label></td>
                            <td><asp:Label runat="server"><%#Eval("Kind") %></asp:Label></td>
                        </tr>
                    </div>
                </AlternatingItemTemplate>
                <EmptyDataTemplate>
                    抱歉，没有数据
                </EmptyDataTemplate>
            </asp:ListView>
            <div>
                <aspNetPager:AspNetPager runat="server" ID="AspNetPager1"
                    AlwaysShow="True"
                    OnPageChanged="AspNetPager1_OnPageChanged"
                    UrlPaging="True"
                    NumbericButtonCount ="3"
                    NumericButtonTextFormatString="[{0}]"
                    ShowCustomInfoSection="Right"
                    ShowPrevNext="True"
                    ShowPageIndex="True"
                    ShowFirstLast="True"
                    FirstPageText="首页"
                    LastPageText="末页"
                    PrevPageText="上一页"
                    NextPageText="下一页"
                    ShowNavigationToolTip="True"
                    TextBeforeInputBox="第"
                    ShowInputBox='Always'
                    TextAfterInputBox="页"
                    SubmitButtonText="确认">                </aspNetPager:AspNetPager>
            </div>
    </div>
    </form>
</body>
</html>

后台完整代码：

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Focus.Asp.WebForm.Czbk.Focus.Helper;
using Focus.Asp.WebForm.Czbk.Focus.ValidateControl;namespace Focus.Asp.WebForm.Czbk.Focus.ListView
{
    public partial class ListView分页AspNetPager第三方控件 : System.Web.UI.Page
    {
        private int pageIndex;
        private int pageSize = Convert.ToInt32(ConfigurationManager.AppSettings["pageSize"]);
        private int totalCount;        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                BindData();
            }
        }        protected void AspNetPager1_OnPageChanged(object sender, EventArgs e)
        {
            BindData();            /*设置分页控件属性*/
            this.AspNetPager1.CustomInfoHTML = "记录总数：<b>" + AspNetPager1.RecordCount.ToString() + "</b>";
            this.AspNetPager1.CustomInfoHTML += " 总页数：<b>" + AspNetPager1.PageCount.ToString() + "</b>";
            this.AspNetPager1.CustomInfoHTML += " 当前页：<font color=\"red\"><b>" + AspNetPager1.CurrentPageIndex.ToString() + "</b></font>";
        }        private void BindData()
        {
            List<Electronics> dataSource = DataSourceTemplete.GetElectronics();            pageIndex = this.AspNetPager1.CurrentPageIndex;
            totalCount = DataSourceTemplete.GetElectronics().Count;            this.ListView1.DataSource = dataSource.Skip(pageIndex- * pageSize)
                .Take(pageSize)
                .ToList();
                ;
            this.ListView1.DataBind();            /*设置分页控件属性*/
            this.AspNetPager1.RecordCount = totalCount;//所有数据的总数，必须设置该值。
            this.AspNetPager1.PageSize = pageSize;
        }
    }
}

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