Call Ref cursors in DAAB

Question

Hi,
I have one procedure in Oracle which is returning the REF Cursor I am accessing it by using the Data access application block DAAB like the following:
OracleParameter param = new OracleParameter();
param.ParameterName = "Emp_Cursor";
param.OracleType = OracleType.Cursor;
param.Direction = ParameterDirection.Output;
param.Size = 3000;
Database db = DatabaseFactory.CreateDatabase("DBConnection");
//DbCommand cmd = db.GetSqlStringCommand("Select * from emp");
DbCommand cmd = db.GetStoredProcCommand("emppackage.select_employee");
db.AddOutParameter(cmd, param.ParameterName, param.DbType, param.Size);
DataSet ds = new DataSet();
ds = db.ExecuteDataSet(cmd);
GridView1.DataSource = ds;
GridView1.DataBind();
But iam getting this error:
ORA-06550: line 1, column 7:
PLS-00306: wrong number or types of arguments in call to 'SELECT_EMPLOYEE'
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
How to call Ref Cursors in DAAB.
Thanks in advance.

Answer 1

Hi.
I'm having the same problem. My package is as follows:
CREATE OR REPLACE PACKAGE PKG_COOPERATORS AS
TYPE T_CURSOR IS REF CURSOR;
PROCEDURE SP_FETCH_PARTY(vPARTY_ID IN NUMBER, curParty OUT T_CURSOR);
END PKG_COOPERATORS;
CREATE OR REPLACE PACKAGE BODY PKG_COOPERATORS AS
PROCEDURE SP_FETCH_PARTY (vPARTY_ID IN NUMBER, curParty OUT T_CURSOR)
AS
BEGIN
OPEN curParty FOR
SELECT *
FROM
PARTY
WHERE
PARTY_ID = vPARTY_ID
END SP_FETCH_PARTY;
END PKG_COOPERATORS;
My code is as follows:
Database db = DatabaseFactory.CreateDatabase();
using (DbCommand cm = db.GetStoredProcCommand(proc))
db.AddInParameter(cm, "vPARTY_ID", System.Data.DbType.Int64, 1);
db.AddOutParameter(cm, "curParty", System.Data.DbType.Object, 0);
SafeDataReader dr = new SafeDataReader(db.ExecuteReader(cm));
I've also used KALK's method of
System.Data.OracleClient.OracleParameter param = new System.Data.OracleClient.OracleParameter();
param.ParameterName = "curParty";
param.OracleType = System.Data.OracleClient.OracleType.Cursor;
param.Size = 3000;
db.AddOutParameter(cm, param.ParameterName , param.DbType.Object, param.Size);
and get the exact same error.
Thanks in advance,
Jamie