Datalist 数字分页 asp.net中Datalist使用数字分页的实现方法

时间:2021-03-18 人气:0

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<%@ 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"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head runat="server"> 
<title>无标题页</title> 
<link href="CSS/CSS.css" rel="stylesheet" type="text/css" /> 
</head> 
<body> 
<form id="form1" runat="server"> 
<div> 
<asp:DataList ID="DataList1" runat="server"> 
<ItemTemplate> 
<asp:Label ID="Label1" runat="server" Text='<%# Eval("mid") %>'></asp:Label> 
</ItemTemplate> 
</asp:DataList> 
</div> 
<br /> 
<div id="PageInfo" runat="server" class="LPageBar"></div> 
</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>"; 
} 
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; 
} 
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 
AS 
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 
GO 

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