[Ext.Net]GridPanel之Access数据库分页显示

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Data.OleDb;
namespace DzPlatForm.DBUtility
{
    public  class AccessPage
    {
        private string _StringConnection;

        public string StringConnection
        {
            get { return _StringConnection; }
            set { _StringConnection = value; }
        }

        /// <summary>
        /// 分页使用
        /// </summary>
        /// <param name="query"></param>
        /// <param name="passCount"></param>
        /// <returns></returns>
        private string recordID(string query, int passCount)
        {

            using (OleDbConnection m_Conn = new OleDbConnection(StringConnection))
            {
                m_Conn.Open();
                OleDbCommand cmd = new OleDbCommand(query, m_Conn);
                string result = string.Empty;
                using (OleDbDataReader dr = cmd.ExecuteReader())
                {
                    while (dr.Read())
                    {
                        if (passCount < 1)
                        {
                            result += "," + dr.GetInt32(0);
                        }
                        passCount--;
                    }
                }
                m_Conn.Close();
                m_Conn.Dispose();
                return result.Substring(1);
            }
        }
        /// <summary>
        /// ACCESS高效分页
        /// </summary>
        /// <param name="pageIndex">当前页码</param>
        /// <param name="pageSize">分页容量</param>
        /// <param name="strKey">主键</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 strKey, 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 = strKey + " asc ";
            using (OleDbConnection m_Conn = new OleDbConnection(StringConnection))
            {
                m_Conn.Open();
                string myVw = string.Format(" ( {0} ) tempVw ", queryString);
                OleDbCommand cmdCount = new OleDbCommand(string.Format(" select count(*) 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, strKey, myVw, whereString, orderString), pageUpperBound);
                    cmdRecord = new OleDbCommand(string.Format("select {0} from {1} where {2} in ({3}) order by {4} ", showString, myVw, strKey, recordIDs, orderString), m_Conn);

                }
                OleDbDataAdapter dataAdapter = new OleDbDataAdapter(cmdRecord);
                DataTable dt = new DataTable();
                dataAdapter.Fill(dt);
                m_Conn.Close();
                m_Conn.Dispose();
                return dt;
            }
        }
    }
}

数据源：

        /// 数据源刷新
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void StoreProject_RefreshData(object sender, StoreRefreshDataEventArgs e)
        {
            DateTime startdate;
            DateTime enddate;
            startdate = Convert.ToDateTime(this.dfstartdate.Text.Trim());
            enddate = Convert.ToDateTime(this.dfenddate.Text.Trim());

            int PageSize = this.PagingToolbar1.PageSize; //获取当前在页面中PagingToolBar 的PageSize的值
            int Count = 0;
            int CurPage = e.Start / PageSize + 1; //获取当前的页码是多少，也就是第几页

            StringBuilder strShow = new StringBuilder();
            strShow.Append(" ID,项目编号,[项目编号-标记号], 标记号,申请日期,产品型号,样品数量,客户品名1,客户编号,销售员,样品设计人");//,采购回复最大日
            strShow.Append(" ,预计完成时间 as 预计完成,实际完成时间 as 实际完成,客户要求交期,项目评分,客户品名2,备注,报价单号,客户类型,产品类型,产品性质");
            strShow.Append(" ,是否开模,是否收费,是否做认证,模具费用,认证费用,设计审核人,项目类别,图纸编号,样品订单号,项目说明,客户反馈,项目状态,首单时间,文件归档,产品品牌");

            StringBuilder strSql = new StringBuilder();
            strSql.Append(" select ID,项目编号,[项目编号-标记号], 标记号,申请日期,产品型号,样品数量,客户品名1,客户编号,销售员,样品设计人");//,采购回复最大日
            strSql.Append(" ,预计完成时间 ,实际完成时间 ,客户要求交期,项目评分,客户品名2,备注,报价单号,客户类型,产品类型,产品性质");
            strSql.Append(" ,是否开模,是否收费,是否做认证,模具费用,认证费用,设计审核人,项目类别,图纸编号,样品订单号,项目说明,客户反馈,项目状态,首单时间,文件归档,产品品牌");
            strSql.Append(" from 项目进度表  where  format(申请日期,'yyyy-MM-dd')>='" + string.Format("{0:yyyy-MM-dd}", startdate) + "'");
            strSql.Append("  and format(申请日期,'yyyy-MM-dd')<='" + string.Format("{0:yyyy-MM-dd}", enddate) + "'");

            StringBuilder strWhere = new StringBuilder();
            strWhere.Append("where  1=1 ");
            if (txtCustomerCode.Text.Trim() != "")
            {
                strWhere.Append(" and 客户编号 like '" + txtCustomerCode.Text.Trim() + "'");
            }
            if (this.cbxCustomerType.SelectedItem.Text.Trim() != "")
            {
                strWhere.Append(" and 客户类型 like '" + cbxCustomerType.SelectedItem.Text.Trim() + "'");
            }
            if (this.cbxProductType.SelectedItem.Text.Trim() != "")
            {
                strWhere.Append(" and 产品类型 like '" + cbxProductType.SelectedItem.Text.Trim() + "'");
            }

            if (this.cbxProjectStatus.SelectedItem.Text.Trim() != "")
            {
                strWhere.Append(" and 项目状态 like '" + cbxProjectStatus.SelectedItem.Text.Trim() + "'");
            }

            int pagecount = 0;//总共多少页=PageSize
            var store = this.GpProject.GetStore();
            DBCon db = new DBCon("ZMProject");

            AccessPage page = new AccessPage();
            page.StringConnection = db.StringConnection();
            DataTable dt = page.ExecutePager(CurPage, PageSize, "ID", strShow.ToString(), strSql.ToString(), strWhere.ToString(), " 申请日期 DESC ", out pagecount, out Count);

            e.Total = Count;
            if (Count > 0)
            {
                store.DataSource = dt;//绑定数据
                store.DataBind();
            }
            else
            {
                X.Msg.Alert("查询结果", "<font style='color:red;'>没有找到任何数据!</font>").Show();
            }
        }

显示结果: