I am trying to call Oracle stored procedure which returns ref cursor, and i need to generate tree view from that returned data. I am new at this and i have two problems.
First problem is that i am not able to call that procedure. I am getting this error: "wrong number or types of arguments in call to 'OBJECT_HIERARCHY'"
And my second problem is that i don't understand how am i gonna get that data when this procedure returns a ref cursor value? There are more then 5000 records in that table and i am not getting that data, but a ref cursor value. Can someone please explain how can i get that data with ref cursor value. I have no experience with Oracle.
This is the procedure definition in oracle:
CREATE OR REPLACE PROCEDURE SAD.object_hierarchy
(nAppId IN NUMBER,
nParentId IN NUMBER DEFAULT -1,
o_cRefCursor OUT SYS_REFCURSOR)
IS
BEGIN
IF NOT o_cRefCursor%ISOPEN THEN
OPEN o_cRefCursor FOR
SELECT
h.PARENT_ID, h.CHILD_ID, h.H_LEVEL,
o.OBJECT_IDENTIFIER, o.OBJECT_TYPE_ID
FROM
(
SELECT
PARENT_ID, CHILD_ID, LEVEL AS H_LEVEL
FROM OBJECT_RELATIONSHIPS
START WITH PARENT_ID = nParentId --> -1 --= 60170
CONNECT BY PRIOR CHILD_ID = PARENT_ID
) h
INNER JOIN
OBJECTS o
ON
o.OBJECT_ID = h.CHILD_ID AND
O.APPLICATION_ID = nAppId;
END IF;
END object_hierarchy;
these are the table field definitions
Column Name Data Type
OBJECT_REL_ID NUMBER (14)
PARENT_ID NUMBER (14)
CHILD_ID NUMBER (14)
OBJECT_IDENTIFIER VARCHAR2 (255 Byte)
OBJECT_TYPE_ID VARCHAR2 (5 Byte)
and this is my code which returns error:
string oradb = "Data Source=(DESCRIPTION="
+ "(ADDRESS=(PROTOCOL=TCP)(HOST=tnt33)(PORT=1521))"
+ "(CONNECT_DATA=(SERVICE_NAME=ORCL)));"
+ "User Id=xxx;Password=xxxxx;";
OracleConnection con = new OracleConnection(oradb);
try
{
con.Open();
OracleCommand cmd = new OracleCommand();
cmd.Connection = con;
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.CommandText = "SAD.object_hierarchy";
cmd.Parameters.Add("nAppId", OracleDbType.Int16).Value = 1;
OracleParameter oraP = new OracleParameter();
oraP.OracleDbType = OracleDbType.RefCursor;
oraP.Direction = System.Data.ParameterDirection.Output;
cmd.Parameters.Add(oraP);
OracleDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
}
reader.Close();
}
catch (Exception ex)
{
con.Close();
}
Can someone please help me and explain to me why is my code returning this error: "wrong number or types of arguments in call to 'OBJECT_HIERARCHY'"
Example:
string connStr = "Data Source=datasource;Persist Security Info=True;User ID=user;Password=pass;Unicode=True";
DataSet dataset = new DataSet();
string connStr = ConfigurationManager.ConnectionStrings["OracleConn"].ToString();
using (OracleConnection objConn = new OracleConnection(connStr))
{
OracleCommand objCmd = new OracleCommand();
objCmd.Connection = objConn;
objCmd.CommandText = "Oracle_PkrName.Stored_Proc_Name";
objCmd.CommandType = CommandType.StoredProcedure;
objCmd.Parameters.Add("Emp_id", OracleType.Int32).Value = 3; // Input id
objCmd.Parameters.Add("Emp_out", OracleType.Cursor).Direction = ParameterDirection.Output;
try
{
objConn.Open();
objCmd.ExecuteNonQuery();
OracleDataAdapter da = new OracleDataAdapter(objCmd);
da.Fill(dataset);
}
catch (Exception ex)
{
System.Console.WriteLine("Exception: {0}", ex.ToString());
}
objConn.Close();
}
如果您要提供OUT
,则还需要提供nParentId
,因为当语句发送到服务器时,.NET不会命名这些参数。
cmd.Parameters.Add("nParentId", OracleDbType.Int16).Value = -1;
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