Datalist数字分页
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test(Datalist数字分页).aspx.cs" Inherits="Test_Datalist数字分页_" %>
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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***********************************
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;
///
///PageNums 的摘要说明
///
public class PageNums
{
///
/// DataSet实例
/// DataList名称
/// 分页大小
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 ? "首页;上一页" : "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 ? "" + i + "" : "" + i + "";
}
pagestr += page != allpage ? "下一页末页" : " 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 = ""+page + "/" + allpage + "页";
pagestr += page > 1 ? "首页上一页" : "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 ? "" + i + "" : "" + i + "";
}
pagestr += page != allpage ? "下一页末页" : " 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;
}
}
********************************存处过程pagesql*********************************
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