How do you pass parameters to a Pipelined function?

Question

I am using Oracle 10G and the ODP .NET 32 bit client.
I am facing an issue trying to use variable binding with a pipeline function in Oracle. I am using ODP .NET for connecting to the database.
If you want to be familiar with PIPELINED functions, you can read [this  blog.|http://oradim.blogspot.com/2007/10/odpnet-tip-using-pipelined-functions.html]
I have very similar code with a difference. My function takes in two parameters that I need to pass to get the table. This is working in SQLPLUS without any issues.
In my C# code, however things change. My function no longer returns a recordset (data reader), if I use the standard method of assigning the parameters.
The code will work if I concat the variables in a string.
Here is the example that doesn't work.
        static OracleDataReader fetchData(OracleConnection oc, string strPONumber)
            try
                OracleCommand od = oc.CreateCommand();
                od.CommandType = System.Data.CommandType.Text;
                od.CommandText = "select * from table(pkg_fetchPOInfo.getPORowsTable(:1,:2))";
                OracleParameter op1 = new OracleParameter();
                op1.ParameterName = "1";
                op1.OracleDbType = OracleDbType.Varchar2;
                op1.Direction = System.Data.ParameterDirection.Input;
                op1.Size = 7;
                op1.Value = strPONumber;
                od.Parameters.Add(op1);
                OracleParameter op2 = new OracleParameter();
                op2.ParameterName = "2";
                op2.OracleDbType = OracleDbType.Varchar2;
                op2.Direction = System.Data.ParameterDirection.Input;
                op2.Size = 3;
                op2.Value = "US";
                od.Parameters.Add(op2);
                OracleDataReader or = od.ExecuteReader();
                return or;
            catch (Exception e)
                Console.WriteLine("Error " + e.ToString());
                return null;
        }Here is the example that does.
      static OracleDataReader fetchData(OracleConnection oc, string strPONumber)
            try
                OracleCommand od = oc.CreateCommand();
                string formSQL = "Select * from table(pkg_fetchPOInfo.getPORowsTable('"+strPONumber+"','US'))";
                od.CommandType = System.Data.CommandType.Text;
                od.CommandText = formSQL;
                OracleDataReader or = od.ExecuteReader();
                return or;
            catch (Exception e)
                Console.WriteLine("Error " + e.ToString());
                return null;
        }

Answer 1

throw it into an anonymous block and it should work for you.
--create or replace type varcharTableType as table   of varchar2 (4000);
create or replace
PACKAGE TESTP AS
  function TESTPIPE(nr in number, nr2 in number) return varchartabletype pipelined;
END TESTP;
CREATE OR REPLACE
PACKAGE BODY TESTP AS
  function TESTPIPE(nr in number, nr2 in number) return varchartabletype pipelined AS
      CURSOR TESTPIPE_cur
       IS
          SELECT (level + 1) datam
            FROM dual
          connect by level < nr;
     vtt varchartabletype ;
  BEGIN
         OPEN TESTPIPE_cur;
           LOOP
              FETCH testpipe_cur
              BULK COLLECT INTO vtt LIMIT nr2;
              FOR indx IN 1 .. vtt.COUNT
              LOOP
                  Pipe Row ( vtt( indx ) )  ;
              END LOOP;
              EXIT WHEN testpipe_cur%NOTFOUND;
           END LOOP;
  END TESTPIPE;
END TESTP;
       public static void pipeTest()
            String conString = GetConnectionString();
            OracleConnection _conn = new OracleConnection(conString);
            _conn.Open();
            OracleCommand oCmd = new OracleCommand();
            oCmd.CommandText = "begin open :crs for Select * from table(testp.testpipe(:nr,:nr2)); end;";
            oCmd.CommandType = CommandType.Text ;
            oCmd.Connection = _conn;
            OracleParameter crs = new OracleParameter();
            crs.OracleDbType = OracleDbType.RefCursor;
            crs.Direction = ParameterDirection.Output;
            crs.ParameterName = "crs";
            oCmd.Parameters.Add(crs);
            OracleParameter nr = new OracleParameter();
            nr.OracleDbType = OracleDbType.Int64;
            nr.Direction = ParameterDirection.Input ;
            nr.ParameterName = "nr";
            nr.Value = 25;
            oCmd.Parameters.Add(nr);
            OracleParameter nr2 = new OracleParameter();
            nr2.OracleDbType = OracleDbType.Int64;
            nr2.Direction = ParameterDirection.Input;
            nr2.ParameterName = "nr2";
            nr2.Value = 10;
            oCmd.Parameters.Add(nr2);
            using (OracleDataReader MyReader = oCmd.ExecuteReader())
                int ColumnCount = MyReader.FieldCount;
                // get the data and add the row
                while (MyReader.Read())
                    String s = MyReader.GetOracleValue(0).ToString();
                    Console.WriteLine(string.Format("i={0}", s));
            Console.ReadLine();
        }