.NET+Oracle 分页

http://www.cnblogs.com/Jusoc/archive/2011/08/28/2156530.html#commentform

、在oracle的sqlplus或其他工具中运行一下pl/sql块建立存储过程

------------------------------------------------------------
--分页存储过程
------------------------------------------------------------
--创建包
create or replace package testpackage as
type test_cursor is ref cursor;
end testpackage;
/

--创建过程
create or replace procedure fenye
(
       tableName in varchar2, --表名
       fields in varchar2,    --查询解果显示字段
       wherecase in varchar2, --查询条件
       pageSize in number,  --一页显示记录数
       pageNow in number,   --当前页
       orderField  varchar2, --排序字段，为空表示不排序
       orderFlag number,     --排序标识 ：正序 ：倒序
       myrows out number,   --总记录数
       myPageCount out number, --总分页
       p_cursor out testpackage.test_cursor     --返回的记录集
) is
--定义部分
--定义sql语句字符串
v_sql varchar2();
--定义两个整数
v_begin number:=(pageNow-)*pagesize+; --开始记录
v_end number:=pageNow*pageSize;         --结束记录
--排序sql
v_orderSql varchar2():='';
v_wherecase varchar2():='';
begin
  --执行部分
  --如果orderField不为空，则进行排序，如果orderFlag=0为升序，1为降序
  if orderField is not null then
    if orderFlag= then
      v_orderSql:=' order by '||orderField;
    elsif orderFlag= then
      v_orderSql:=' order by '||orderField||' desc';
    else
      null;
    end if;
  end if;
  --条件判断语句
  if wherecase is not null then
    v_wherecase:=' where '||wherecase;
  end if;
  v_sql:='select * from
          (select t1.* ,rownum rn from(select '|| fields ||' from '|| tableName|| v_wherecase ||' '||v_orderSql ||') t1 where rownum<='|| v_end ||')
          where rn>='|| v_begin;
  --把游标和sql关联
  open p_cursor for v_sql;
  --计算myrows和myPageCount
  --组织一个sql
  v_sql:='select count(*) from '|| tableName || v_wherecase || ' ' ||v_orderSql;
  --执行sql,并把返回的值赋给myrows;
  execute immediate v_sql into myrows;
  --计算myPageCount
  if mod(myrows,Pagesize)= then
    myPageCount:=myrows/Pagesize;
  else
    myPageCount:=myrows/pagesize+;
  end if;
  --关闭游标
  --close p_cursor;
end;
/

 、.net中的oracle过程调用类

/// <summary>
    /// c#调用oracle的过程进行分页/// </summary>
    public class Paging
    {
        private string _connectionString;
        private string _tableName;
        private string _fields = "*";
        private string _whercase="";
        private int _pageSize=;
        private int _pageNow=;
        private string _orderField="";
        private int _orderFlag = ;
        private int _myRows;
        private int _myPageCount;
        private DataTable _result;

        /// <summary>
        /// 数据库连接字符串
        /// </summary>
        public string ConnectionString
        {
            get { return _connectionString; }
            set { _connectionString = value; }
        }

        /// <summary>
        /// 表名
        /// </summary>
        public string TableName
        {
            get { return _tableName; }
            set { _tableName = value; }
        }
        /// <summary>
        /// 查询结果显示字段
        /// </summary>
        public string Fields
        {
            get { return _fields; }
            set { _fields = value; }
        }
        /// <summary>
        /// 查询条件
        /// </summary>
        public string Whercase
        {
            get { return _whercase; }
            set { _whercase = value; }
        }
        /// <summary>
        /// 页显示记录数
        /// </summary>
        public int PageSize
        {
            get { return _pageSize; }
            set { _pageSize = value; }
        }
        /// <summary>
        /// 当前页
        /// </summary>
        public int PageNow
        {
            get { return _pageNow; }
            set { _pageNow = value; }
        }
        /// <summary>
        /// 排序字段，为空""表示不排序
        /// </summary>
        public string OrderField
        {
            get { return _orderField; }
            set { _orderField = value; }
        }
        /// <summary>
        /// 排序标识 0：正序 1：倒序
        /// </summary>
        public int OrderFlag
        {
            get { return _orderFlag; }
            set { _orderFlag = value; }
        }
        /// <summary>
        /// 总记录数
        /// </summary>
        public int MyRows
        {
            get { return _myRows; }
        }
        /// <summary>
        /// 总分页
        /// </summary>
        public int MyPageCount
        {
            get { return _myPageCount; }
        }
        /// <summary>
        /// 返回的记录集
        /// </summary>
        public DataTable Result
        {
            get { return _result; }
        }

        public Paging()
        {
            fenye();
        }

        public Paging(string connectionString,string tableName, string fields, string wherecase, int pageSize, int pageNow, string orderField, int orderFlag, out int myRows, out int myPageCount, out DataTable result)
        {
            _connectionString = connectionString;
            _tableName = tableName;
            _fields = fields;
            _whercase = wherecase;
            _pageSize = pageSize;
            _pageNow = pageNow;
            _orderField = orderField;
            _orderFlag = orderFlag;

            fenye();
            myRows = _myRows;
            myPageCount = _myPageCount;
            result = _result;

        }

        private void fenye()
        {
            OracleConnection conn = new OracleConnection(_connectionString);
            conn.Open();

            try
            {
                OracleCommand cmd = new OracleCommand();
                cmd.Connection = conn;
                cmd.CommandType = CommandType.StoredProcedure;

                //调用存储过程查询数据
                cmd.CommandText = "fenye";
                OracleParameter[] parameters = new OracleParameter[];
                //注意这里的参数名和类型号与存储过程里面的一样
                parameters[] = new OracleParameter("tableName", OracleType.VarChar);
                parameters[] = new OracleParameter("fields", OracleType.VarChar);
                parameters[] = new OracleParameter("wherecase", OracleType.VarChar);
                parameters[] = new OracleParameter("pageSize", OracleType.Int32);
                parameters[] = new OracleParameter("pageNow", OracleType.Int32);
                parameters[] = new OracleParameter("orderField", OracleType.VarChar);
                parameters[] = new OracleParameter("orderFlag", OracleType.Int32);
                parameters[] = new OracleParameter("myrows", OracleType.Int32);
                parameters[] = new OracleParameter("myPageCount", OracleType.Int32);
                parameters[] = new OracleParameter("p_cursor", OracleType.Cursor);

                parameters[].Value = _tableName;
                parameters[].Value = _fields;
                parameters[].Value = _whercase;
                parameters[].Value = _pageSize;
                parameters[].Value = _pageNow;
                parameters[].Value = _orderField;
                parameters[].Value = _orderFlag;
                parameters[].Direction = ParameterDirection.Output;
                parameters[].Direction = ParameterDirection.Output;
                parameters[].Direction = ParameterDirection.Output;

                foreach (OracleParameter parameter in parameters)
                {
                    cmd.Parameters.Add(parameter);
                }
                //执行命令
                OracleDataAdapter oda = new OracleDataAdapter(cmd);
                DataSet ds = new DataSet();
                oda.Fill(ds);
                //得到查询结果表
                _result = ds.Tables[];

                //取出总行数
                _myRows = Convert.ToInt32(parameters[].Value);
                //取出总页数
                _myPageCount = Convert.ToInt32(parameters[].Value.ToString());

            }
            catch (Exception ex)
            {

                throw;
            }
            finally
            {
                conn.Close();
            }

        }

    }