MYSQL- 分页存储过程

CREATE PROCEDURE `sp_hj_splitpage`(
 in _pagecurrent int,/*当前页*/
 in _pagesize int,/*每页的记录数*/
 in _ifelse varchar(1000),/*显示字段*/
 in _where varchar(1000),/*条件*/
 in _order varchar(1000)/*排序*/
)
COMMENT ‘分页存储过程‘
BEGIN
 if _pagesize<=1 then 
  set _pagesize=20;
 end if;
 if _pagecurrent < 1 then 
  set _pagecurrent = 1; 
 end if;
 
 set @strsql = concat(‘select ‘,_ifelse,‘ from ‘,_where,‘ ‘,_order,‘ limit ‘,_pagecurrent*_pagesize-_pagesize,‘,‘,_pagesize); 
 prepare stmtsql from @strsql; 
 execute stmtsql; 
 deallocate prepare stmtsql; 

 set @strsqlcount=concat(‘select count(1) as count from ‘,_where);/*count(1) 这个字段最好是主键*/
 prepare stmtsqlcount from @strsqlcount; 
 execute stmtsqlcount; 
 deallocate prepare stmtsqlcount; 
END

call sp_hj_splitpage(1,3,‘*‘,‘hj_shangpin_cbj where 1=1‘,‘order by id desc‘);

#region 分页存储过程

        /// <summary>
        /// 分页存储过程
        /// </summary>
        /// <param name="table">表,可以关联：如 A left join B on A.id=B.Aid </param>
        /// <param name="fileds">字段值，获取全部字段用"*"</param>
        /// <param name="order">按什么字段排序</param>
        /// <param name="orderType">排序的方式 有ASC和DESC两种</param>
        /// <param name="pageIndex">页索引</param>
        /// <param name="pageSize">页大小</param>
        /// <param name="strWhere">查询条件,如不查可空 ""</param>
        /// <returns>返回一个DataTable</returns>
        public static DataTable GetSplitPageList(string table, string fileds, string order, string orderType, int pageSize, int pageIndex, string strWhere)
        {
            using (MySqlConnection conn = new MySqlConnection(connectionString))
            {
                string strCmd = string.Format("call sp_hj_splitpage({0},{1},‘{2}‘,‘{3} where {4}‘,‘order by {5} {6}‘);", pageIndex, pageSize , fileds, table, strWhere, order, orderType);
                conn.Open();
                MySqlCommand cmd = new MySqlCommand(strCmd, conn);
                DataTable dt = new DataTable();
                MySqlDataReader dr = cmd.ExecuteReader();
                dt.Load(dr);
                return dt;
            }
        }

        /// <summary>
        /// 获得分页总数
        /// </summary>
        /// <param name="table"></param>
        /// <param name="strWhere"></param>
        /// <returns></returns>
        public static int GetSplitPageListCount(string table, string strWhere)
        {
            using (MySqlConnection conn = new MySqlConnection(connectionString))
            {
                conn.Open();
                string strSql = "select count(*) from " + table + " where " + strWhere;
                MySqlCommand cmd = new MySqlCommand(strSql, conn);

                return int.Parse(cmd.ExecuteScalar().ToString());
            }
        }
        #endregion