access下的分页方案（仿sql存储过程）

使用系统；使用 System.Collections.Generic；使用系统文本；使用系统数据；使用 System.Data.OleDb；使用系统.Web； /**//// summary /// 名称：access下的分页方案（仿sql存储过程） /// 作者：cncxz(虫虫) /// blog： http://cncxz.cn

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.OleDb;
using System.Web;

/**////

/// 名称：access下的分页方案（仿sql存储过程）
/// 作者：cncxz(虫虫)
/// 博客：

http://cncxz.cnblogs.com
///
公共类 AdoPager
{
protected string m_ConnString;
    protected OleDbConnection m_Conn;

    public AdoPager()
    {
        CreateConn(string.Empty);
    }
    public AdoPager(string dbPath)
    {
        CreateConn(dbPath) );
    }

    private void CreateConn(string dbPath)
    {
        if (string.IsNullOrEmpty(dbPath))
        {
            string str = System.Configuration.ConfigurationManager.AppSettings[ "dbPath"] as string;
            if (string.IsNullOrEmpty(str))
                str = "~/App_Data/db.mdb";
            m_ConnString = string.Format(@"Provider=Microsoft.Jet .OLEDB.4.0;数据源={0}", HttpContext.Current.Server.MapPath(str));
        }
        else
            m_ConnString = string.Format(@"Provider=Microsoft.Jet. OLEDB.4.0;数据源={0}", dbPath);

        m_Conn = new OleDbConnection(m_ConnString);
    }
    /**////

    /// 打开连接
    ///

    public void ConnOpen()
    {
        if (m_Conn.State != ConnectionState .Open)
            m_Conn.Open();
    }
    /**////

    /// 关闭连接
///

    public void ConnClose()
    {
        if (m_Conn.State != ConnectionState.Closed)
            m_Conn.Close();
    }

    private string recordID(string query, int passCount)
    {
        OleDbCommand cmd = new OleDbCommand(query, m_Conn);
        string result = string.Empty;
using (IDataReader dr = cmd.ExecuteReader())
        {
            while (dr.Read())
            {
                if (passCount
                 {
                    结果 = " ," dr.GetInt32(0);
                }
               passCount--;
            }
        }
        返回结果.Substring(1);
    }

    /**////

    /// 获取当前页应该显示的记录，注意：查询中必须包含名为ID的自动编号列，若不符合你的要求，就修改一下源码吧 :)
    ///

    /// 当前页码
    /// 分页容量
    /// 显示的字段
    /// 查询字符串，支持联合查询
    /// 查询条件，若有条件限制则必须以where 开头
    /// 排序规则
    /// 传出参数：总页数统计
    /// 传出参数：总记录统计
    /// 装载记录的DataTable
    public DataTable ExecutePager(int pageIndex, int pageSize, string showString, string queryString, string whereString, string orderString, out int pageCount, out int recordCount)
    {
        if (pageIndex < 1) pageIndex = 1;
        if (pageSize < 1) pageSize = 10;
        if (string.IsNullOrEmpty(showString)) showString = "*";
        if (string.IsNullOrEmpty(orderString)) orderString = "ID desc";
        ConnOpen();
        string myVw = string.Format(" ( {0} ) tempVw ", queryString);
        OleDbCommand cmdCount = new OleDbCommand(string.Format(" select count(0) as recordCount from {0} {1}", myVw, whereString), m_Conn);

        recordCount = Convert.ToInt32(cmdCount.ExecuteScalar());

        if ((recordCount % pageSize) > 0)
            pageCount = recordCount / pageSize 1;
        else
            pageCount = recordCount / pageSize;
        OleDbCommand cmdRecord;
        if (pageIndex == 1)//第一页
        {
            cmdRecord = new OleDbCommand(string.Format("select top {0} {1} from {2} {3} order by {4} ", pageSize, showString, myVw, whereString, orderString), m_Conn);
        }
        else if (pageIndex > pageCount)//超出总页数
        {
            cmdRecord = new OleDbCommand(string.Format("select top {0} {1} from {2} {3} order by {4} ", pageSize, showString, myVw, "where 1=2", orderString), m_Conn);
        }
        else
        {
            int pageLowerBound = pageSize * pageIndex;
            int pageUpperBound = pageLowerBound - pageSize;
            string recordIDs = recordID(string.Format("select top {0} {1} from {2} {3} order by {4} ", pageLowerBound, "ID", myVw, whereString, orderString), pageUpperBound);
            cmdRecord = new OleDbCommand(string.Format("select {0} from {1} where id in ({2}) order by {3} ", showString, myVw, recordIDs, orderString), m_Conn);

        }
        OleDbDataAdapter dataAdapter = new OleDbDataAdapter(cmdRecord);
        DataTable dt=new DataTable();
        dataAdapter.Fill(dt);
        ConnClose();
        return dt;
    }
}

还有调用示例：html代码

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

http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

   


   

   

       

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代码隐藏代码示例

使用 System；
使用 System.Data；
使用 System.Configuration；
使用 System.Web；
使用 System.Web.Security；
使用System.Web.UI;
使用 System.Web.UI.WebControls;
使用 System.Web.UI.WebControls.WebParts;
使用 System.Web.UI.HtmlControls;
使用 System.集合.通用;

公共部分类 _Default : System.Web.UI.Page
{
    private AdoPager mm_Pager;
    protected AdoPager m_Pager
    {
        get{
if (mm_Pager == null)
               mm_Pager = new AdoPager();
            return mm_Pager;
        }
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        if(!IsPostBack)
            LoadData();
    }
    private int pageIndex = 1;
    private int pageSize = 20;
    private int pageCount = -1;
    private int记录计数 = -1;

    private void LoadData()
    {
        string strQuery = "从 tableTest 中选择 a.*,b.KindText a left join tableKind b on a.KindCode=b.KindCode ";
        string strShow = "ID,主题,KindCode,KindText";    
       
        DataTable dt = m_Pager.ExecutePager(pageIndex, pageSize, strShow, strQuery, "", "ID desc", out pageCount, out recordCount);
        GridView1.DataSource = dt;
        GridView1. DataBind();
        Label1.Text = string.Format("共{0}条记录，每页{1}条，页次{2}/{3}",recordCount,pageSize,pageIndex,pageCount);
    }
   
  
    protected void btnJump_Click(object sender, EventArgs e)
    {
        int.TryParse(txtPageSize.Text, out pageIndex);
        LoadData();
    }
}