oracle 返回结果集的存储过程

/*  oracle 返回结果集的存储过程
      1、先创建一个包
        create or replace testpaceage as
        type test_cursor is ref cursor;
        end testpaceage;
     2、创建存储过程，获取结果集
        create or replace procedure sp_pro9
       (spNo in number,p_cursor out testpaceage.test_cursor)
       is
       begin
       open p_cursor for select * from emp where deptno=spno;
       end
   */

 

//C#代码

  OracleDataAdapter sdr = new OracleDataAdapter();

        OracleCommand cmd = new OracleCommand();
        OracleParameter[] parameters ={
                                 new OracleParameter("spno",OracleType.Number),
                                 new OracleParameter("p_cursor",OracleType.Cursor),
        };
        parameters[0].Value =30;
        parameters[1].Direction = ParameterDirection.Output;
     
        cmd.Connection = conn;
        cmd.CommandText ="sp_pro9";
        cmd.CommandType = CommandType.StoredProcedure;
        foreach (OracleParameter parameter in parameters)
        {
            cmd.Parameters.Add(parameter);
        }
        sdr.SelectCommand = cmd;
        DataSet ds = new DataSet();
        sdr.Fill(ds);
        GridView1.DataSource = ds;
        GridView1.DataBind();