Entity framework-calling stored Proc to return one param returns ORA-6550

Question

Hi There,
I am new to the VS2010/MVC3 game with ODP.net, so no abuse please .......
I have successfully inserted a record into a table via the controller/entity framework, but only by currently hard coding the id. The next logical step is to attempt to obtain the id from the Oracle DB via a stored procedure. Here is the body of the PL/SQL procedure on the Oracle side:-
create or replace package body dotnetcommon as
PROCEDURE getnextpoid ( p_to_id OUT NUMBER ) IS
BEGIN
     SELECT pord_seq.nextval INTO p_to_id FROM dual;
END getnextpoid;
end dotnetcommon;
show error
I have then added this procedure to my Entity Framework Model within VS2010 , and from within the Model Browser, I now have a stored procedure of "DOTNETCOMMON_GETNEXTPOID" under my Model.Store. This has an out type parameter named p_to_id, which is a type of number.
I then added a function import, so I have a function by the name of "GETNEXTPOID" under the Function Imports folder, with a collection property of 'None'.
This function has a parameter P_TO_ID with a type of "Decimal".
From within my controller, I have the following code:-
[HttpPost]
public string Create(PURCHASEORDER po)
TasEntities tmprep = new TasEntities();
ObjectParameter poid = new ObjectParameter("poId", typeof(Int16));
var result = tmprep.GETNEXTPOID(poid);
return "Next PO Id is " + result;
Thus, on pressing the Save from my view, i am hoping to return the next logical sequence number into the poid objectparameter. However, I am presented with the following error:-
Inner Exception of:-
{"ORA-06550: line 1, column 8:\nPLS-00306: wrong number or types of arguments in call to 'GETNEXTPOID'\nORA-06550: line 1, column 8:\nPL/SQL: Statement ignored"}
It falls over , taking me to the Model.Designer.cs at :-
public int GETNEXTPOID(ObjectParameter p_TO_ID)
return base.ExecuteFunction("GETNEXTPOID", p_TO_ID);
I am assuming it is to do with the decimal/int/number conversion, but I do not have the nouse to fix it ? Does anybody know what is wrong with what I have attempted to do above ?
Please please get back to me if you need any more information, I am wanting to move on but cannot.
I have seen posts regarding setting the sequence in a before insert trigger on the table, but this is not ideal. Can the above not work instead ?
Many thanks in advance for any help you can provide.
Graeme
Edited by: user4487499 on 05-Apr-2011 08:18

Answer 1

I have now raised this in the odp.net forum, as on looking at other posts it seems to be the best place for it.
Cheers,
Graeme
Edited by: user4487499 on 05-Apr-2011 08:18
Edited by: user4487499 on 05-Apr-2011 13:00