asp.net中Datalist使用数字分页的实现方法

复制代码代码如下:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test(Datalist数字分页).aspx.cs" Inherits="Test_Datalist数字分页_" %>

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

</head>

<body>

<div>

<asp:DataList ID="DataList1" runat="server">

<asp:Label ID="Label1" runat="server" Text='<%# Eval("mid") %>'></asp:Label>

</ItemTemplate>

</asp:DataList>

</div>

<br />

</form>

</body>

</html>

CS代码：

复制代码代码如下:

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

public partial class Test_Datalist数字分页_ : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

//ComFunction cf = new ComFunction();

//DataSet ds = cf.DataBind("M_dizhi");

//this.PageInfo.InnerHtml = PageNums.GetPageNum(ds, DataList1, 12);

this.PageInfo.InnerHtml = PageNums.GetPageSql("M_dizhi", DataList1, 12);

}

PageNums.cs

复制代码代码如下:

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Data.SqlClient;

/// <summary>

///PageNums 的摘要说明

/// </summary>

public class PageNums

{

/// </summary>

/// <param name="ds">DataSet实例</param>

/// <param name="datalistname">DataList名称</param>

/// <param name="pagesize">分页大小</param>

public static string GetPageNum(DataSet ds, DataList datalistname, int pagesize)

{

PagedDataSource objPds = new PagedDataSource();

objPds.DataSource = ds.Tables[0].DefaultView;

objPds.AllowPaging = true;

int total = ds.Tables[0].Rows.Count;

objPds.PageSize = pagesize;

int page;

if (HttpContext.Current.Request.QueryString["page"] != null)

page = Convert.ToInt32(HttpContext.Current.Request.QueryString["page"]);

else

page = 1;

objPds.CurrentPageIndex = page - 1;

datalistname.DataSource = objPds;

datalistname.DataBind();

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 (pagesize != 0)

{

allpage = (total / pagesize);//计算总页数

allpage = ((total % pagesize) != 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" + allpage + "页";

pagestr += page > 1 ? "<a href="" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=1">首页</a>;<a href="" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=" + pre + "">上一页</a>" : "首页上一页";

//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 ? "<font color="#ff0000">" + i + "</font>" : "<a href="" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=" + i + "">" + i + "</a>";

}

pagestr += page != allpage ? "<a href="" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=" + next + "">下一页</a><a href="" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=" + allpage + "">末页</a>" : " 下一页末页";

return pagestr;

}

public static string GetPageSql(string FileName, DataList datalistname, int pagesize)

{

int page;

int allpage = 0;

int next = 0;

int pre = 0;

int startcount = 0;

int endcount = 0;

string pagestr = "";

if (HttpContext.Current.Request.QueryString["page"] != null)

page = Convert.ToInt32(HttpContext.Current.Request.QueryString["page"]);

else

page = 1;

if (page < 1) { page = 1; }

DataSet ds = DataBindSql("EXEC pagesql '*',' FROM " + FileName + " '," + pagesize + "," + page, FileName);

datalistname.DataSource = ds;

datalistname.DataBind();

int total = DataBind(FileName);

//计算总页数

if (pagesize != 0)

{

allpage = (total / pagesize);//计算总页数

allpage = ((total % pagesize) != 0 ? allpage + 1 : allpage);

allpage = (allpage == 0 ? 1 : allpage);

}

next = page + 1;

pre = page - 1;

startcount = page / 5 * 5;//中间页起始序号

//中间页终止序号

endcount = startcount+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 = "<a>"+page + "/" + allpage + "页</a>";

pagestr += page > 1 ? "<a href="" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=1">首页</a><a href="" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=" + pre + "">上一页</a>" : "首页上一页";

//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 ? "<font color="#ff0000">" + i + "</font>" : "<a href="" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=" + i + "">" + i + "</a>";

}

return pagestr;

}

private static int DataBind(string FileName)

{

string sql = "select * from " + FileName;

DbConnection dc = new DbConnection();

SqlConnection mycon = new SqlConnection(dc.ConnectionString);

SqlDataAdapter mypter = new SqlDataAdapter(sql, mycon);

DataSet ds = new DataSet();

mycon.Open();

mypter.Fill(ds, FileName);

mycon.Close();

int total = ds.Tables[0].Rows.Count;

return total;

}

private static DataSet DataBindSql(string sql, string FileName)

{

DbConnection dc = new DbConnection();

SqlConnection mycon = new SqlConnection(dc.ConnectionString);

SqlDataAdapter mypter = new SqlDataAdapter(sql,mycon);

DataSet ds = new DataSet();

mycon.Open();

mypter.Fill(ds, FileName);

mycon.Close();

return ds;

}

存储过程pagesql

复制代码代码如下:

CREATE PROCEDURE pagesql

@sqlSelect varchar(800) --SELECT 后面 FROM 前面的字段不用包含SELECT

,@sqlFrom varchar(800) --FROM 后面的字段包含FROM

,@countPerPage int -- 每页数据行数

,@toPage int --要转到的页码

BEGIN

-- 根据每页数据行数和要转到的页码得到数据起止点

Declare @start int

Declare @end int

set @end = @countPerPage * @toPage

set @start = @countPerPage * (@toPage - 1) + 1

-- 临时表名称可随机命名

Declare @tmpTable varchar(10)

SET @tmpTable ='#tmp'

Declare @sqlStr varchar(800)

-- 创建数据源到临时表

SELECT @sqlStr = 'SELECT Identity(int,1,1) AS RowIndex,'

SELECT @sqlStr = @sqlStr + rtrim(@sqlSelect) + ' INTO '+ @tmpTable

SELECT @sqlStr = @sqlStr + rtrim(@sqlFrom)

-- 查询临时表得到所需要的数据

SELECT @sqlStr = @sqlStr + ' '+'SELECT '+ rtrim(@sqlSelect) +' FROM ' + @tmpTable

SELECT @sqlStr = @sqlStr + ' WHERE RowIndex BETWEEN ' + Convert(char,@start) + " AND " + Convert(char,@end)

-- 删除临时表

SELECT @sqlStr = @sqlStr + ' '+'DROP TABLE '+@tmpTable

EXEC (@sqlStr)

END