用AjaxPro实现无刷新翻页效果及数据库分页技术介绍

DROP   TABLE   IF   EXISTS  `zhoufoxcn`.`userlist`;
CREATE   TABLE   `zhoufoxcn`.`userlist` (
  `UserId`  int ( 10 ) unsigned  NOT   NULL  auto_increment,
  `UserName`  varchar ( 45 )  NOT   NULL ,
  `Age`  int ( 10 ) unsigned  NOT   NULL   default   ' 10 ' ,
  `Sex`  tinyint ( 3 ) unsigned  NOT   NULL   default   ' 1 ' ,
  `Tall`  int ( 10 ) unsigned  NOT   NULL ,
  `Salary`  int ( 10 ) unsigned  NOT   NULL ,
   PRIMARY   KEY   (`UserId`)
) ENGINE = InnoDB AUTO_INCREMENT = 694   DEFAULT  CHARSET = utf8;

select   *   from  userlist  order by userId limit n,m

select   top  (m - n)  *   from  userList  where  userid  not   in
( select   top   n userid  from  userList   order   by  userid)  order   by  userid

select   *   from  ( select  rownum no, *   from  userlist  where  rownum <= m)  where  no >= n; 

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

<! 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 > AjaxPro翻页效果 </ title >
     < style  type ="text/css" >
tr.items {         
    background-color :  #8FACC2 ;
    border-color : #FFFFFF ;
    line-height : 18px ;
}
tr.table {          /* 表格内容 */
    background-color :  #F1F3F5 ;
    border-color : #FFFFFF ;
    line-height : 18px ;
}
     </ style >
</ head >
< body  onload ="JumpPage(1)" >
     < form  id ="form1"  runat ="server" >
     < table  border ="0"  cellpadding ="1"  cellspacing ="1" >
     < tr >< td > 和谐小区青年居民概况表 </ td ></ tr >
     < tr >< td >
     < div  id ="memberList" >
    数据装载中，请等待.....
      </ div >
      </ td ></ tr >
      < tr >< td > 说明：本名单中不包括离退休人员、残疾智障人员和儿童。 </ td ></ tr >
      </ table >
     </ form >
     < script  language ="javascript"  type ="text/javascript"  defer ="defer" >
         var  pageSize = 20 ; // 假定每页显示20条数据
         function  JumpPage(page) // 完全服务器端分页处理方法
        {
             var  label = document.getElementById( " memberList " );
            label.innerHTML = AjaxPager.GetString(parseInt(page),parseInt(pageSize)).value;
        }
         /*
        function ShowPager()
        {
        }
        
        function JumpPageClient(page)
        {
            var label=document.getElementById("memberList");
            var data=AjaxPager.GetDataTable(parseInt(page),parseInt(pageSize)).value;
            if(data!=null)
            {
            alert(data.Rows.length);
            }
            label.innerHTML=data.Rows.length;
            
        }
         */
     </ script >
</ body >
</ html >

using  System;
using  System.Data;
using  System.Configuration;
using  System.Collections;
using  System.Web;
using  System.Web.Caching;
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.Text;
using  MySql.Data.MySqlClient;
using  MySql.Data.Types;

///   <summary>
///  说明：本文介绍如何利用AjaxPro技术实现翻页时局部刷新，同时也介绍了翻页所涉及到的数据库知识(MySQL、MS SQL和Oracle)。
///  本演示程序采用MySQL数据库，数据库中的数据是采用程序随机生成的。
///  首发地址：http://blog.csdn.net/zhoufoxcn/archive/2008/03/12/2174234.aspx
///  作者：周公
///  日期：2008-3-12
///   </summary>
public   partial   class  AjaxPager : System.Web.UI.Page
{
     protected   void  Page_Load( object  sender, EventArgs e)
    {
        AjaxPro.Utility.RegisterTypeForAjax( typeof (AjaxPager));
    }

     ///   <summary>
     ///  从数据库中指定位置读取指定数目的数据
     ///   </summary>
     ///   <param name="startIndex"> 记录的起始页位置 </param>
     ///   <param name="size"> 要读取的记录条数 </param>
     ///   <returns></returns>
    [AjaxPro.AjaxMethod]
     public  DataTable GetDataTable( int  pageIndex,  int  size)
    {
        MySqlConnection connection  =   new  MySqlConnection(ConfigurationManager.ConnectionStrings[ " MySql " ].ConnectionString);
        MySqlDataAdapter adapter  =   new  MySqlDataAdapter( " select * from userlist limit  "   +  (pageIndex - 1 )  *  size  +   " , "   +  size, connection);
        DataTable data  =   new  DataTable();
        adapter.Fill(data);
        connection.Close();
        adapter.Dispose();
         return  data;
    }
     ///   <summary>
     ///  传递div节点的html字符串
     ///   </summary>
     ///   <param name="startIndex"> 记录的起始页位置 </param>
     ///   <param name="size"> 要读取的记录条数 </param>
     ///   <returns></returns>
    [AjaxPro.AjaxMethod]
     public   string  GetString( int  pageIndex,  int  size)
    {
        StringBuilder text  =   new  StringBuilder();
        text.Append( " <table border='0' cellpadding='0' cellspacing='0' width='520px'> " );
        text.Append( " <tr class='items' align='center'> " );
        text.Append( " <td style='width:80px'>编号</td> " );
        text.Append( " <td style='width:80px'>姓名</td> " );
        text.Append( " <td style='width:80px'>年龄</td> " );
        text.Append( " <td style='width:80px'>性别</td> " );
        text.Append( " <td style='width:80px'>身高</td> " );
        text.Append( " <td style='width:80px'>工资</td> " );
        text.Append( " </tr> " );
        DataTable source  =  GetDataTable(pageIndex,size);
        DataRow row;
         for  ( int  i  =   0 ; i  <  source.Rows.Count; i ++ )
        {
            row  =  source.Rows[i];
            text.Append( " <tr class='table' align='center'> " );
             for  ( int  column  =   0 ; column  <  source.Columns.Count; column ++ )
            {    
                text.Append( " <td style='width:80px'> "   +  row[column].ToString()  +   " </td> " );
            }
            text.Append( " </tr> " );
        }
         int  pageCount = ( int )(Math.Ceiling(GetRecordCount() / ( double )size));
        text.Append( " <tr class='items' align='center'> " );
        text.Append( " <td><a href='javascript:JumpPage(1)'>首页</a></td> " );
         if  (pageIndex  <  pageCount)
        {
            text.Append( " <td><a href='javascript:JumpPage( "   +  (pageIndex + 1 )  +   " )'>下一页</a></td> " );
        }
         else
        {
            text.Append( " <td>下一页</a></td> " );
        }
         if  (pageIndex  >   1 )
        {
            text.Append( " <td><a href='javascript:JumpPage( "   +  (pageIndex - 1 ) +   " )'>上一页</a></td> " );
        }
         else
        {
            text.Append( " <td>上一页</a></td> " );
        }
        text.Append( " <td><a href='javascript:JumpPage( "   +  pageCount  +   " )'>尾页</a><td> " );
        text.Append( " <td>当前页： " + pageIndex + " / " + pageCount + " </td> " );
        text.Append( " </table> " );
         return  text.ToString();
    }
     ///   <summary>
     ///  返回记录总条数
     ///   </summary>
     ///   <returns></returns>
    [AjaxPro.AjaxMethod]
     public   int  GetRecordCount()
    {
        MySqlConnection connection  =   new  MySqlConnection(ConfigurationManager.ConnectionStrings[ " MySql " ].ConnectionString);
        MySqlCommand command  =   new  MySqlCommand( " select count(userId) from userlist " , connection);
        connection.Open();
         int  count  =   int .Parse(command.ExecuteScalar().ToString());
        connection.Close();
        command.Dispose();
         return  count;
    }
}