Need help for a school project

Question

I am new to Oracle/Sql and the last part of my project requires that I use a Stored Procedure to access info from an AUTHORS table. I have followed the guidelines in the assignment but for some reason the Stored procedure is not working. If someone could help I would REALLY appreciate it. Thanks.
public void fillSet(string key)
if (connect())
cmd.CommandText = "SELECT TO_CHAR(SALES.ORD_DATE), SALES.QTY, SALES.TITLE_ID, TITLES.TITLE, TITLES. PRICE FROM SALES, TITLES WHERE SALES.TITLE_ID = TITLES.TITLE_ID AND SALES.STOR_ID = :key";
parm = new OracleParameter("key", key);
cmd.Parameters.Add(parm);
reader = cmd.ExecuteReader();
while (reader.Read())
ORDER_DATE = (string)reader.GetString(0);
QUANTITY = (int)reader.GetDecimal(1);
TITLE_ID = (string)reader.GetString(2);
TITLE = (string)reader.GetString(3);
PRICE = (double)reader.GetDouble(4);
TOTAL = QUANTITY * PRICE;
AUTHORS = loadStoredProcedure(TITLE_ID);
loadDataSet();
reader.Dispose();
cmd.Dispose();
oracleConn.Close();
return;
else return;
public string loadStoredProcedure(string match)
string cmdStr2 = "ALLAUTHORSFORTITLE";
op1 = new OracleParameter();
op1.Direction = ParameterDirection.Input;
op1.Value = (object)match;
op2 = new OracleParameter();
op2.Direction = ParameterDirection.Output;
op2.Size = 100;
cmd2 = new OracleCommand();
cmd2.CommandText = cmdStr2;
cmd2.Parameters.Add(op1);
cmd2.Parameters.Add(op2);
cmd2.CommandType = CommandType.StoredProcedure;
int code = cmd2.ExecuteNonQuery();  //error here
String buildit = (string)op2.Value;
oracleConn.Close();
return buildit;
}

Answer 1

Hi,
In cases with the same problems do you have, it's recommended to post a break point before the call of the store procedure. And then test the store procedure with this values separately. If you do this you can find out where the problem is.
Also, is best if you put the output of the console log to see what it's the problem.
Regards,