Datalist in asp.net USES the implementation method of digital paging
- 2020-05-12 02:26:55
- OfStack
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test(Datalist Digital paging ).aspx.cs" Inherits="Test_Datalist Digital paging _" %>
<!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> No title page </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 code:
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 Digital paging _ : 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;
/// <summary>
///PageNums Summary of
/// </summary>
public class PageNums
{
/// </summary>
/// <param name="ds">DataSet The instance </param>
/// <param name="datalistname">DataList The name of the </param>
/// <param name="pagesize"> Page size </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; }
// Total page count
if (pagesize != 0)
{
allpage = (total / pagesize);// Total page count
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;// Start of middle page
// Middle page termination sequence number
endcount = page < 5 ? 10 : page + 5;
if (startcount < 1) { startcount = 1; } // To avoid negative Numbers in the output, set if less than 1 From the serial number 1 start
if (allpage < endcount) { endcount = allpage; } // The page number +5 The possibility that the final output sequence number will be greater than the total page number will be controlled within the page number
pagestr = " A total of " + allpage + " page ";
pagestr += page > 1 ? "<a href=\"" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=1\"> Home page </a>;<a href=\"" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=" + pre + "\"> on 1 page </a>" : " Home page on 1 page ";
// Middle page processing, which increases the time complexity and decreases the space complexity
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 + "\"> Under the 1 page </a><a href=\"" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=" + allpage + "\"> At the end of the page </a>" : " Under the 1 page At the end of the page ";
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);
// Total page count
if (pagesize != 0)
{
allpage = (total / pagesize);// Total page count
allpage = ((total % pagesize) != 0 ? allpage + 1 : allpage);
allpage = (allpage == 0 ? 1 : allpage);
}
next = page + 1;
pre = page - 1;
startcount = page / 5 * 5;// Start of middle page
// Middle page termination sequence number
endcount = startcount+5;
if (startcount < 1) { startcount = 1; } // To avoid negative Numbers in the output, set if less than 1 From the serial number 1 start
if (allpage < endcount) { endcount = allpage; } // The page number +5 The possibility that the final output sequence number will be greater than the total page number will be controlled within the page number
pagestr = "<a>"+page + "/" + allpage + " page </a>";
pagestr += page > 1 ? "<a href=\"" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=1\"> Home page </a><a href=\"" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=" + pre + "\"> on 1 page </a>" : " Home page on 1 page ";
// Middle page processing, which increases the time complexity and decreases the space complexity
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 + "\"> Under the 1 page </a><a href=\"" + HttpContext.Current.Request.CurrentExecutionFilePath + "?page=" + allpage + "\"> At the end of the page </a>" : " Under the 1 page At the end of the page ";
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;
}
}
Stored procedure pagesql
CREATE PROCEDURE pagesql
@sqlSelect varchar(800) --SELECT behind FROM In front of the the field Don't have to include SELECT
,@sqlFrom varchar(800) --FROM behind the field contains FROM
,@countPerPage int -- Number of data rows per page
,@toPage int -- Page number to go to
AS
BEGIN
-- Based on the number of rows per page and Page number to go to get Data start and stop point
Declare @start int
Declare @end int
set @end = @countPerPage * @toPage
set @start = @countPerPage * (@toPage - 1) + 1
-- Temporary table name Random naming
Declare @tmpTable varchar(10)
SET @tmpTable ='#tmp'
Declare @sqlStr varchar(800)
-- Create the data source to the temporary table
SELECT @sqlStr = 'SELECT Identity(int,1,1) AS RowIndex,'
SELECT @sqlStr = @sqlStr + rtrim(@sqlSelect) + ' INTO '+ @tmpTable
SELECT @sqlStr = @sqlStr + rtrim(@sqlFrom)
-- Query temporary table Get the data you need
SELECT @sqlStr = @sqlStr + ' '+'SELECT '+ rtrim(@sqlSelect) +' FROM ' + @tmpTable
SELECT @sqlStr = @sqlStr + ' WHERE RowIndex BETWEEN ' + Convert(char,@start) + " AND " + Convert(char,@end)
-- Delete temporary table
SELECT @sqlStr = @sqlStr + ' '+'DROP TABLE '+@tmpTable
EXEC (@sqlStr)
END
GO