Out parameter cast issue - C#

Question

Hi all,
Having an issue with an older application I am supporting. The data access is CSLA .Net and there is a line that updates a newly created entity id with the value from an out parameter. This is defined in the database as NUMERIC(10,0). The code looks like this:
OracleParameter opID = new OracleParameter("P_ID", OracleDbType.Int64);
//... do some stuff and save the new entity to the db
_id = (long)opID.Value;
This used to be fine on windows XP with version 9.x of ODP .Net. On a Windows 7 box with the latest version the cast fails and the return data type Decimal. This looks to me like a bug/weird behavior in the new version. Is there a workaround or something I can do to fix the issue without, preferably without changing my code?
Thanks!
Matei
Edited by: Matei on Apr 29, 2013 4:05 PM

Answer 1

Yes for sure, thanks for the reply. Here are more details on the table schema and the proc that's being called. It's part of a package that does user related CRUD operations.
ID     NUMBER(10,0)     No
USERNAME     VARCHAR2(20 BYTE)     No
PASSWORD     VARCHAR2(20 BYTE)
FIRST_NAME     VARCHAR2(40 BYTE)
LAST_NAME     VARCHAR2(40 BYTE)
PROCEDURE insert_by_pk (
p_id OUT fact.users.ID%TYPE,
p_first_name IN fact.users.first_name%TYPE,
p_last_name IN fact.users.last_name%TYPE,
p_home_phone IN fact.users.home_phone%TYPE,
p_business_phone IN fact.users.business_phone%TYPE,
p_mobile_phone IN fact.users.mobile_phone%TYPE,
p_fax IN fact.users.fax%TYPE,
p_email IN fact.users.email%TYPE,
p_internal IN fact.users.INTERNAL%TYPE,
p_username IN fact.users.username%TYPE,
p_password IN fact.users.password%TYPE,
p_home_ext IN fact.users.home_ext%TYPE,
p_business_ext IN fact.users.business_ext%TYPE,
p_active          IN     fact.users.active%TYPE
AS
BEGIN
INSERT INTO fact.users
(ID, first_name,
last_name, home_phone, business_phone,
mobile_phone, fax, email, internal,
username, password, home_ext, business_ext, active,
                    CREATE_USER,CREATE_DATE
VALUES (FACT.users_seq.NEXTVAL, p_first_name,
p_last_name, p_home_phone, p_business_phone,
p_mobile_phone, p_fax, p_email, p_internal,
LOWER(p_username), p_password, p_home_ext, p_business_ext, p_active,
                    (select sys_context('userenv','os_user') FROM DUAL),SYSDATE
SELECT FACT.users_seq.CURRVAL
INTO p_id
FROM DUAL;
END;
And for completeness the C# code. The line that fails is the second to last one where the cast happens: _id = (long)opID.Value;
// we're not being deleted, so insert or update
                              OracleParameter opID = new OracleParameter("P_ID", OracleDbType.Int64);
                              if(this.IsNew)
                                   // we're new so insert
                                   cm.CommandText = "FACT.users_pkg.insert_by_pk";
                                   opID.Direction = ParameterDirection.Output;
                                   cm.Parameters.Add(opID);
                              else
                                   // we're not new, so update
                                   cm.CommandText = "FACT.users_pkg.update_by_pk";
                                   opID.Direction = ParameterDirection.Input;
                                   cm.Parameters.Add("p_id", _id);
                              cm.Parameters.Add("p_first_name", _firstName);
                              cm.Parameters.Add("p_last_name", _lastName);
                              cm.Parameters.Add("p_home_phone", _homePhone);
                              cm.Parameters.Add("p_bus_phone", _busPhone);
                              cm.Parameters.Add("p_mobile_phone", _mobilePhone);
                              cm.Parameters.Add("p_fax", _fax);
                              cm.Parameters.Add("p_email", _email);
                              cm.Parameters.Add("p_internal", _internal ? "Y" : "N");
                              cm.Parameters.Add("p_username", _username.ToLower());
                              cm.Parameters.Add("p_password", "password");
                              cm.Parameters.Add("p_home_ext", _homePhoneExt);
                              cm.Parameters.Add("p_business_ext", _busPhoneExt);
                              cm.Parameters.Add("p_active", _active ? "Y" : "N");
                              cm.ExecuteNonQuery();
                              if(this.IsNew)
                                   // update ID with the oracle generated sequence
                                   _id = (long)opID.Value;
Edited by: 1002325 on Apr 25, 2013 7:56 AM
Edited by: 1002325 on Apr 25, 2013 7:57 AM