ASP.NET技巧：access下的分页方案

网络编程 2024/10/15 佚名

3 2 1

具体不多说了，只贴出相关源码~

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.OleDb;
using System.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.cnblogs.com
/// </summary>
public class AdoPager
"dbPath"] as string;
            if (string.IsNullOrEmpty(str))
                str = "~/App_Data/db.mdb";
            m_ConnString = string.Format(@"Provider=Microsoft.Jet.OLEDB.4.0;Data source=", HttpContext.Current.Server.MapPath(str));
        "Provider=Microsoft.Jet.OLEDB.4.0;Data source=", dbPath);

        m_Conn = new OleDbConnection(m_ConnString);
    "," + dr.GetInt32(0);
                "pageIndex">当前页码</param>
    /// <param name="pageSize">分页容量</param>
    /// <param name="showString">显示的字段</param>
    /// <param name="queryString">查询字符串，支持联合查询</param>
    /// <param name="whereString">查询条件，若有条件限制则必须以where 开头</param>
    /// <param name="orderString">排序规则</param>
    /// <param name="pageCount">传出参数：总页数统计</param>
    /// <param name="recordCount">传出参数：总记录统计</param>
    /// <returns>装载记录的DataTable</returns>
    public DataTable ExecutePager(int pageIndex, int pageSize, string showString, string queryString, string whereString, string orderString, out int pageCount, out int recordCount)
    "*";
        if (string.IsNullOrEmpty(orderString)) orderString = "ID desc";
        ConnOpen();
        string myVw = string.Format(" ( ", queryString);
        OleDbCommand cmdCount = new OleDbCommand(string.Format(" select count(0) as recordCount from ", 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
        "select top ", pageSize, showString, myVw, whereString, orderString), m_Conn);
        "select top ", pageSize, showString, myVw, "where 1=2", orderString), m_Conn);
        "select top ", pageLowerBound, "ID", myVw, whereString, orderString), pageUpperBound);
            cmdRecord = new OleDbCommand(string.Format("select ", showString, myVw, recordIDs, orderString), m_Conn);

"C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

示例的codebehind代码

using System;
using System.Data;
using System.Configuration;
using System.Web;
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.Collections.Generic;

public partial class _Default : System.Web.UI.Page
"select a.*,b.KindText from tableTest a left join tableKind b on a.KindCode=b.KindCode ";
        string strShow = "ID,Subject,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",recordCount,pageSize,pageIndex,pageCount);
    }


    protected void btnJump_Click(object sender, EventArgs e)
    {
        int.TryParse(txtPageSize.Text, out pageIndex);
        LoadData();
    }
}