由於access資料庫內沒有儲存過程一說.
那麼實現它的分頁上效率問題一直都是麻煩事..下面一段**,相當來說算了很高效的了.
如果有什麼更好的方法,請多指教! 謝謝!
呼叫方法
string strsql = " select p.productid,p.proclassid,p.productname,p.proflag,p.datetime,p.productimage,c.proclassname,c.proclasskey,c.proclassdes from productinfo p " +
" left join proclass c on p.proclassid=c.proclassid ";
string strshow = " productid,productname,datetime,productimage,proflag,proclassname,proclasskey,proclassdes ";
return classfile.accesshelper.executepager(pageindex, pagesize, "productid", strshow, strsql, strwhere, " productid desc ", out pagecount, out recordcount);
///
/// 分頁使用
///
///
///
///
private static string recordid(string query, int passcount)
passcount--; }
}m_conn.close();
m_conn.dispose();
return result.substring(1); }
}///
/// access高效分頁
///
/// 當前頁碼
/// 分頁容量
/// 主鍵
/// 顯示的字段
/// 查詢字串，支援聯合查詢
/// 查詢條件，若有條件限制則必須以where 開頭
/// 排序規則
/// 傳出引數：總頁數統計
/// 傳出引數：總記錄統計
/// 裝載記錄的datatable
public static datatable executepager(int pageindex, int pagesize, string strkey,string showstring, string querystring, string wherestring, string orderstring, out int pagecount, out int recordcount)
) tempvw ", querystring);
oledbcommand cmdcount = new oledbcommand(string.format(" select count(*) 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)//第一頁
from order by ", pagesize, showstring, myvw, wherestring, orderstring), m_conn); }
else if (pageindex > pagecount)//超出總頁數
from order by ", pagesize, showstring, myvw, "where 1=2", orderstring), m_conn); }
else
from order by ", pagelowerbound, strkey, myvw, wherestring, orderstring), pageupperbound);
cmdrecord = new oledbcommand(string.format("select from where in () order by ", 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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由於access資料庫內沒有儲存過程一說.那麼實現它的分頁上效率問題一直都是麻煩事.下面一段 相當來說算了很高效的了.如果有什麼更好的方法,請多指教 謝謝 呼叫方法 string strsql select p.productid,p.proclassid,p.productname,p.profl...
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由於access資料庫內沒有儲存過程一說.那麼實現它的分頁上效率問題一直都是麻煩事.下面一段 相當來說算了很高效的了.如果有什麼更好的方法,請多指教 謝謝 呼叫方法 string strsql select p.productid,p.proclassid,p.productname,p.profl...
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