Question

I have the following code:

        var entityConnection = (System.Data.EntityClient.EntityConnection)c.Connection;
        DbConnection conn = entityConnection.StoreConnection;
        ConnectionState initialState = conn.State;

        List<Jobs> list = new List<Jobs>();

        int id = 0;
 try
        {
            if (initialState != ConnectionState.Open)
                conn.Open();

            using (DbCommand cmd = conn.CreateCommand())
            {
                cmd.CommandText = sql;
                reader = cmd.ExecuteReader();

                int count = 0;

                while (reader.Read())
                {
                    id = int.Parse(reader[0].ToString());

                    list.Add(db.Jobs.Where(x => x.JobId == id).First());
                    //count++;
                    //if (count == 150) break;

                    reader.NextResult();
                }
            }
        }

and i get an error saying: “system.invalidoperationexception: invalid attempt to call NextResult when reader is closed”

but the thing is i havent closed the reader, however when i remove this line:

list.Add(db.Jobs.Where(x => x.JobId == id).First());

then all works fine! But this is useless to me as I need to populate a list object from the reader which if i can’t do – then I can’t read the table in! (p.s i am avoiding sqldatareader and using dbdatareader as it is associated with me using the entity framework to make the above call)

Answer 1

You need to remove the call to NextResult. This method is used to advance to the next result set, not the next record. The reader.Read() in your while loop is enough