ASP.NET的Web网页如何进行分页操作(Demo举例)
大概说一下思路,可以利用sql的 Offset/Fetch Next分页,点击这里
这里的Demo利用LINQ的写好的方法
//这里是某个表的列表 skip是跳过前面的多少条数据 take这是跳过前面的数据后显示多少条数据
db.Albums.ToList().Skip((pageNumber - 1) * pageSize).Take(pageSize).ToList();
我们是四个按钮一个首页,上一页,下一页,尾页,点击跳转
有不明白的,或者小编描述错误的模糊的欢迎评论私信
这个页面的前台页面
<%@ Page Title="" Language="C#" MasterPageFile="~/Admin/AdminSite.Master" AutoEventWireup="true" CodeBehind="MusicManager.aspx.cs" Inherits="WebApplication1.Admin.MusicManager1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
<link href="../Assets/css/input.css" rel="stylesheet" />
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<div class="pure-form">
<fieldset>
<%--genres表--%>
<legend>后台管理<i class="fa fa-angle-double-right"></i>音乐管理
<asp:Button ID="Button1" runat="server" CssClass="button-default pure-button-primary tools-button" Text="添加音乐" OnClick="Button1_Click" />
</legend>
</fieldset>
</div>
<table class="pure-table">
<thead>
<tr>
<th>#</th>
<th>音乐名称</th>
<th>歌手名称</th>
<th>标题</th>
<th>单价</th>
<th>图片</th>
<th>编辑</th>
</tr>
</thead>
<tbody>
<asp:Repeater ID="Repeater1" runat="server" OnItemCommand="Repeater1_ItemCommand">
<ItemTemplate>
<tr>
<td><%# Eval("AlbumId") %></td>
<td><%# Eval("Genres.Name") %></td>
<td><%# Eval("Artists.Name") %></td>
<td><%# Eval("Title") %></td>
<td><%# Eval("Price") %></td>
<td><%# Eval("AlbumArtUrl") %><asp:Image ID="Image1" ImageUrl='<%# "~"+Eval("AlbumArtUrl") %>' runat="server" Width="40px" Height="40px" /></td>
<td>
<asp:LinkButton ID="LinkButton1" CssClass="button-default pure-button-primary" runat="server" CommandArgument='<%#Eval("AlbumId") %>' CommandName="Edit">编辑</asp:LinkButton>
<asp:LinkButton ID="LinkButton2" CssClass="button-default button-error" runat="server" CommandArgument='<%#Eval("AlbumId") %>' CommandName="Delete">删除</asp:LinkButton></td>
</tr>
</ItemTemplate>
</asp:Repeater>
<tr>
<td colspan="6">
<asp:Label ID="Label1" runat="server"></asp:Label>
<asp:Button ID="btnFirst" runat="server" Text="首页" OnClick="btnFirst_Click" />
<asp:Button ID="btnPrev" runat="server" Text="上页" OnClick="btnPrev_Click" />
<asp:Button ID="btnNext" runat="server" Text="下页" OnClick="btnNext_Click" />
<asp:Button ID="btnLast" runat="server" Text="尾页" OnClick="btnLast_Click" />
</td>
</tr>
</tbody>
</table>
</asp:Content>
这个页面的后台页面
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using WebApplication1.BLL;
using WebApplication1.DAL;
namespace WebApplication1.Admin
{
public partial class MusicManager1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
LoadData();
}
protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e)
{
string str = e.CommandName.ToString();
//这里获取id,我的id是刚才我赋值的时候CommandArgument是赋值的id
int id = Convert.ToInt32(e.CommandArgument.ToString());
//using (OLMSDBEntities oLMSDB = new OLMSDBEntities())
//{
// var gener = oLMSDB.Genres.FirstOrDefault(t => t.GenreId == id);
if (str == "Delete")
{
//后面是对数据库的操作,可以忽略
// oLMSDB.Genres.Remove(gener);
bool flag_deleteMussicType = BLL.MusicManager.deleteMusicManager(id);
if (flag_deleteMussicType)
{
string strUrl = "<script>alert('删除成功');window.location.href='MusicManager.aspx'</script>";
Response.Write(strUrl);
}
else
{
string strUrl = "<script>alert('删除失败');</script>";
Response.Write(strUrl);
}
}
else if (str == "Edit")
{
Response.Redirect($"Edit_MusicManager.aspx?id={id}");
}
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("Add_MusicManager.aspx");
}
//分页的具体代码
//页码
public int pageNumber
{
//取值的话,如果里面没有就说明第一次进入,然后给它赋值,下面在取值
get
{
if (ViewState["page"] == null)
{
return 1;
}
else
{
return Convert.ToInt32(ViewState["page"]);
}
}
set
{
ViewState["page"] = value;
}
}
//每页的记录数
public int pageSize
{
get
{
return 5;
}
}
//总页数
public int pageCount
{
get
{
if (ViewState["count"] == null)
{
return 1;
}
else
{
return Convert.ToInt32(ViewState["count"]);
}
}
set
{
ViewState["count"] = value;
}
}
public void LoadData()
{
using (OLMSDBEntities oLMSDB = new OLMSDBEntities())
{ //这里是某个表的列表 skip是跳过前面的多少条数据 take这是跳过前面的数据后显示多少条数据
// //这里是我需要显示第三页的数据,我们要跳过二页的数据,所以是(3-1)*一页的数据量
Repeater1.DataSource = oLMSDB.Albums.ToList().Skip((pageNumber - 1) * pageSize).Take(pageSize).ToList();
Repeater1.DataBind();
pageCount = oLMSDB.Albums.ToList().Count;
Label1.Text = $"每页{pageSize}条,共{pageCount}条 ";
//我们最后剩下一行数据也要在加一页,如果有余数就要加一页
pageCount = pageCount % pageSize == 0 ? pageCount / pageSize : pageCount / pageSize + 1;
}
Label1.Text += "当前页数为" + pageNumber + "/" + pageCount;
}
//首页
protected void btnFirst_Click(object sender, EventArgs e)
{
pageNumber = 1;
LoadData();
}
//上一页
protected void btnPrev_Click(object sender, EventArgs e)
{
//防止到0页,如果到0页的话,我们就是到1页
pageNumber = pageNumber - 1 < 1 ? pageNumber = 1 : pageNumber - 1;
LoadData();
}
//下一页
protected void btnNext_Click(object sender, EventArgs e)
{
//防止超出所有的页面总数,超出的话,就赋值页面总数
pageNumber = pageNumber + 1 > pageCount ? pageNumber = pageCount : pageNumber + 1;
LoadData();
}
//尾页
protected void btnLast_Click(object sender, EventArgs e)
{
pageNumber = pageCount;
LoadData();
}
}
}
效果图