Asp.net 自定义分页功能

1、新建一个MyPage类

 

代码 
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/// <summary>
/// Summary description for Page
/// </summary>
public class MyPage
{
    public MyPage()
    {
        //
        // TODO: Add constructor logic here
        //
    }


    /// </summary>
    /// <param name="total">总记录数</param>
    /// <param name="per">每页记录数</param>
    /// <param name="page">当前页数</param>
    /// <param name="query_string">Url参数</param>
    /// <param name="ID">参数</param>
    /// <param name="currentpage">当前页</param>
    /// <param name="PageSize">每页分页大小</param>
    public static string pagination(int total, int per, int page, string query_string, int ID, int currentpage, int PageSize)
    {
        int allpage = 0;
        int next = 0;
        int pre = 0;
        int startcount = 0;
        int endcount = 0;
        string pagestr = "";
        if (page < 1) { page = 1; }
        //计算总页数
        if (per != 0)
        {
            allpage = (total / per);
            allpage = ((total % per) != 0 ? allpage + 1 : allpage);
            allpage = (allpage == 0 ? 1 : allpage);
        }
        next = page + 1;
        pre = page - 1;
        startcount = (page + 5) > allpage ? allpage - 9 : page - 4;//中间页起始序号
        //中间页终止序号
        endcount = page < 5 ? 10 : page + 5;
        if (startcount < 1) { startcount = 1; } //为了避免输出的时候产生负数，设置如果小于1就从序号1开始
        if (allpage < endcount) { endcount = allpage; }//页码+5的可能性就会产生最终输出序号大于总页码，那么就要将其控制在页码数之内
        pagestr = "共<font color=\"#ff000\">" + allpage + "</font>页&nbsp;共有<font color=\"#ff0000\">" + total + "</font>条记录&nbsp;当前页<font color=\"#ff0000\">" + currentpage + "</font>/" + allpage + "&nbsp;每页<font color=\"ff0000\">" + PageSize + "</font>条&nbsp;";

        pagestr += page > 1 ? "<a href=\"" + query_string + "&page=1\">首&nbsp页</a>&nbsp;&nbsp;<a href=\"" + query_string + "&page=" + pre + "\">上一页</a>" : "首&nbsp页 上一页";
        //中间页处理，这个增加时间复杂度，减小空间复杂度
        for (int i = startcount; i <= endcount; i++)
        {
            pagestr += page == i ? "&nbsp;&nbsp;<font color=\"#ff0000\">" + i + "</font>" : "&nbsp;&nbsp;<a href=\"" + query_string + "&page=" + i + "\">" + i + "</a>";
        }
        pagestr += page != allpage ? "&nbsp;&nbsp;<a href=\"" + query_string + "&page=" + next + "\">下一页</a>&nbsp;&nbsp;<a href=\"" + query_string + "&page=" + allpage + "\">尾&nbsp页</a>" : " 下一页 尾&nbsp页";

        return pagestr;
    }


}

 

2、建一个TestPageDB.aspx页面；

页面代码如下：

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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
    <style type="text/css">
    body{font-size: 12px;}
    a  {font-size: 12px; text-decoration: none; color: #2F3586;}
    a:hover {background: #dedede; color: ff0000;  }
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <%--HTML代码主体部分--%>

<TABLE cellSpacing=0 cellPadding=0 width=1004 align=center border=0>
   <TBODY>
   <TR>
     <TD vAlign=top width=107></TD>
     <TD width=26 vAlign=top background="image/line1.jpg" style="background-repeat: repeat;">&nbsp;</TD>
     <TD vAlign=top>
         <table width="99%">
             <tr>
                 <td colspan="3" align="center"><%--数据绑定--%>
                      <asp:DataList ID="detail" runat="server" Width="99%">
                       <HeaderTemplate><TABLE cellSpacing=0 cellPadding=0 width="100%" border=0><TBODY></HeaderTemplate>
                       <ItemTemplate><tr>
                             <td width=12 height=8><IMG height="5" src="image/main_but_09_1.gif" width="6"><%#Eval("ID") %></td>
                             <td><A href="news_type.aspx?ID=<%#Eval("ID") %>"><%#Eval("username") %></A>&nbsp;&nbsp;<font color="666666"><%#Eval("loginname")%></font></TD>
                           </tr>
                           <tr>
                             <td colspan="2" background="image/skim.gif" height="1"></td>
                             </tr></ItemTemplate>
                       <FooterTemplate></TBODY></TABLE></FooterTemplate>
                       </asp:DataList><%--数据绑定--%>
                     </td>
             </tr>
             <tr>
                 <td colspan="3" style="width: 715px" align="right"><div align="center">
                     <%--分页代码--%><asp:Label ID="pagelist" runat="server"></asp:Label><%--分页代码--%></td>
             </tr>
         </table>
     </TD></TR></TBODY></TABLE>

    </div>
    </form>
</body>
</html>

 

后台代码：

 

代码 
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class Report_TestPageDB : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        String sql = "select * from userinfo";
        int totalcount;//总记录数
        int currentpage;//当前页
        int PageSize = 4;//分页大小
        int totalpage;//记录总页数

        ///总记录数
        totalcount = getTotalcount("select count(id) from userinfo");
        //当前页
        //计算总页数;totalpage
        if (totalcount / PageSize == 0)
        {
            totalpage = totalcount / PageSize;
        }
        else
        {
            totalpage = totalcount / PageSize + 1;
        }

        if (Request.QueryString["page"] == null)///指地址栏中没有PAGE字符
        {
            currentpage = 1;
        }
        if (Request.QueryString["page"] != null)
        {
            // 判断是否为数值
            if (querystring.isNumber(Request.QueryString["page"]) == false)
            {
                currentpage = 1;
            }
            else///是数值
            {
                if (Request.QueryString["page"].Length > 10 || Request.QueryString["page"].Length < 1)///防止Convert.ToInt32抛出异常或者防止地址栏所得到的page=这样的值
                {
                    currentpage = 1;
                    //Response.End();
                }
                else
                {
                    if (Convert.ToInt32(Request.QueryString["page"]) > totalpage)///是否大于总页数
                    {
                        currentpage = totalpage;
                    }
                    else
                    {
                        if (Convert.ToInt32(Request.QueryString["page"]) <= 1)///是否小于页数1
                        {
                            currentpage = 1;
                        }
                        else
                        {
                            currentpage = Convert.ToInt32(Request.QueryString["page"]);
                        }
                    }
                }
            }
        }
        else
        {
            currentpage = 1;
        }
        detail.DataSource = myDataBind(sql, currentpage, PageSize,"userinfo");//填充数据
        detail.DataBind();
        pagelist.Text = MyPage.pagination(totalcount, PageSize, currentpage, "TestPageDB.aspx?id=0", 0, currentpage, PageSize).ToString();//分页/
    }

    /// <summary>
    /// 查找结果集
    /// </summary>
    /// <param name="sqls">sql查询语句</param>
    /// <param name="currentpage">当前页</param>
    /// <param name="pagesize">每页大小</param>
    /// <param name="table">数据库表名</param>
    /// <returns>DataView</returns>
    public DataView myDataBind(string sqls, int currentpage, int pagesize, string table)
    {
        int startcount;
        if (currentpage < 1)
        {
            startcount = currentpage * pagesize;
        }
        else
        {
            startcount = (currentpage - 1) * pagesize;
        }
        SqlConnection conn = new SqlConnection("Data Source=.;Initial Catalog=testDB;Persist Security Info=True;User ID=sa;password=sa");
        conn.Open();
        SqlDataAdapter da = new SqlDataAdapter(sqls, conn);
        DataSet ds = new DataSet();
        da.Fill(ds, startcount, pagesize, table.ToString());
        conn.Close();
        return ds.Tables[0].DefaultView;

    }


    /// <summary>
    /// 获得总记录数
    /// </summary>
    /// <param name="sql">sql查询语句</param>
    /// <returns>int 总记录数</returns>
    public int getTotalcount(String sql)
    {
        int i = 0;
        SqlConnection conn = null;
        try
        {
            conn = new SqlConnection("Data Source=.;Initial Catalog=testDB;Persist Security Info=True;User ID=sa;password=sa");
            conn.Open();
            SqlCommand cmd = new SqlCommand(sql,conn);
            i = Convert.ToInt32(cmd.ExecuteScalar());
        }
        catch (Exception)
        {
            
            throw;
        }
        conn.Close();
        return i;
    }



}

3、建一个测试数据库testDB

建一张userinfo表，字段为id、 username 和loginname即可，插入一些测试数据。

 

posted @ 2010-03-03 15:44  why520crazy  阅读(154)  评论(0)  编辑  收藏  举报