Ext.Net 1.x_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;            }        }    }}

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        /// 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();            }        }

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