Oracle存储过程分页

1.创建package

CREATE OR REPLACE PACKAGE pkg_query AS TYPE cur_query IS REF CURSOR;
END pkg_query;

2.创建存储过程

create or replace procedure Sp_GetPageList
       (p_tableName        in  varchar2,   --表名
        p_strWhere         in  varchar2,   --查询条件
        p_orderColumn      in  varchar2,   --排序的列
        p_orderStyle       in  varchar2,   --排序方式
        p_curPage          in out Number,  --当前页
        p_pageSize         in out Number,  --每页显示记录条数
        p_totalRecords     out Number,     --总记录数
        p_totalPages       out Number,     --总页数
        v_cur              out pkg_query.cur_query)   --返回的结果集

is
   v_sql VARCHAR2(3000) := '';      --sql语句
   v_startRecord Number(4);         --开始显示的记录条数
   v_endRecord Number(4);           --结束显示的记录条数
BEGIN
   --记录中总记录条数
   v_sql := 'SELECT TO_NUMBER(COUNT(*)) FROM ' || p_tableName || ' WHERE 1=1';
   IF p_strWhere IS NOT NULL or p_strWhere <> '' THEN
       v_sql := v_sql || p_strWhere;
   END IF;
   EXECUTE IMMEDIATE v_sql INTO p_totalRecords;

   --验证页面记录大小
   IF p_pageSize < 0 THEN
       p_pageSize := 0;
   END IF;

   --根据页大小计算总页数
   IF MOD(p_totalRecords,p_pageSize) = 0 THEN
       p_totalPages := p_totalRecords / p_pageSize;
   ELSE
       p_totalPages := p_totalRecords / p_pageSize + 1;
   END IF;

   --验证页号
   IF p_curPage < 1 THEN
       p_curPage := 1;
   END IF;
   IF p_curPage > p_totalPages THEN
       p_curPage := p_totalPages;
   END IF;

   --实现分页查询
   v_startRecord := (p_curPage - 1) * p_pageSize + 1;
   v_endRecord := p_curPage * p_pageSize;
   v_sql := 'SELECT * FROM (SELECT A.*, rownum r FROM ' ||
            '(SELECT * FROM ' || p_tableName;
   IF p_strWhere IS NOT NULL or p_strWhere <> '' THEN
       v_sql := v_sql || ' WHERE 1=1' || p_strWhere;
   END IF;
   IF p_orderColumn IS NOT NULL or p_orderColumn <> '' THEN
       v_sql := v_sql || ' ORDER BY ' || p_orderColumn || ' ' || p_orderStyle;
   END IF;
   v_sql := v_sql || ') A WHERE rownum <= ' || v_endRecord || ') B WHERE r >= '
            || v_startRecord;
   DBMS_OUTPUT.put_line(v_sql);
   OPEN v_cur FOR v_sql;
END  Sp_GetPageList;

3.c#调用存储过程

DbHelperOra类中添加RunProcedure函数

        /// <summary>
        /// 执行存储过程
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="TableName">表名</param>
        /// <param name="strWhere">查询条件</param>
        /// <param name="orderColumn">排序的列</param>
        /// <param name="orderStyle">排序方式</param>
        /// <param name="pageIndex">当前页</param>
        /// <param name="pageSize">每页显示记录条数</param>
        /// <param name="rowCount">总记录数</param>
        /// <param name="pageCount">总页数</param>
        /// <returns></returns>
        public static DataSet RunProcedure(string storedProcName, string TableName, string strWhere, string orderColumn, string orderStyle, int pageIndex, int pageSize, out int rowCount, out int pageCount)
        {
            using (OracleConnection connection = new OracleConnection(connectionString))
            {
                DataSet dataSet = new DataSet();
                connection.Open();
                OracleDataAdapter sqlDA = new OracleDataAdapter(storedProcName, connection);
                rowCount = 0;
                pageCount = 0;
                OracleParameter[] paras ={
                                new OracleParameter("p_tableName",TableName),
                                new OracleParameter("p_strWhere",strWhere),
                                new OracleParameter("p_orderColumn",orderColumn),
                                new OracleParameter("p_orderStyle",orderStyle),
                                new OracleParameter("p_curPage",pageIndex),
                                new OracleParameter("p_pageSize",pageSize),
                                new OracleParameter("p_totalRecords",rowCount),
                                new OracleParameter("p_totalPages",pageCount),
                                new OracleParameter("v_cur", OracleType.Cursor) //返回的游标
                 
                                        };

                paras[6].Direction = ParameterDirection.Output;
                paras[7].Direction = ParameterDirection.Output;
                paras[8].Direction = ParameterDirection.Output;
                sqlDA.SelectCommand.Parameters.AddRange(paras);
                sqlDA.SelectCommand.CommandType = CommandType.StoredProcedure;//设置 使用存储过程
                sqlDA.Fill(dataSet);
                connection.Close();

                rowCount = Convert.ToInt32(paras[6].Value);
                pageCount = Convert.ToInt32(paras[7].Value);
                
                return dataSet;
            }
        }

调用RunProcedure函数 

   /// <summary>
        /// 通用数据分页
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="TableName">表名</param>
        /// <param name="strWhere">查询条件</param>
        /// <param name="orderColumn">排序的列</param>
        /// <param name="orderStyle">排序方式</param>
        /// <param name="pageIndex">当前页</param>
        /// <param name="pageSize">每页显示记录条数</param>
        /// <param name="rowCount">总记录数</param>
        /// <param name="pageCount">总页数</param>

        public DataTable GetPageList(string strWhere, string TableName, string orderColumn, string orderStyle, int curPage, int pageSize, out int totalRecords, out int totalPages)
        {
            DataSet ds = DbHelperOra.RunProcedure("Sp_GetPageList", TableName, strWhere, orderColumn, orderStyle, curPage, pageSize, out totalRecords, out totalPages);
            DataTable dt = new DataTable();
            if (ds != null && ds.Tables.Count > 0)
            {
                dt = ds.Tables[0];
            }
            return dt;
        }