Invalid attempt to access a file before calling Read()

[mbewers1]

Hi,

I'm getting the following error when executing the SQL within this line of code.
Originally, I had coded a stored procedure within the code but this brought up the same error.

I've looked for help elsewhere on the net but can't seem to find anything specific to what I need to resolve this. And I need to use MySqlDataReader so that I can use .GetOrdinal to get the positioning of the columns correct.

Anyone else had and resolved this problem?

public DataTable GetBibtexPaperDetails(string file)
        {
            using (MySqlConnection sqlCon = new MySqlConnection(ConnectionString))
            {
                sqlCon.Open();
                MySqlCommand command = sqlCon.CreateCommand();
                command.CommandType = CommandType.StoredProcedure;
                command.CommandText = 
                    string.Format(@"SELECT * FROM PROJmb326.Paper p
                      WHERE p.Title LIKE '{0}' OR p.Keywords LIKE '{0}'
                      ORDER BY p.Title ASC", file);
 
                DataTable ds = new DataTable();
                using(MySqlDataReader dr = command.ExecuteReader())
                {
                    while (dr.Read())
                    {
                        ds.Columns.Add();
                        ds.Rows.Add(dr.GetOrdinal("Author1Firstname").ToString());
                        ds.Rows.Add(dr.GetOrdinal("Author1Surname").ToString());
                    }
                }
                return ds;
            }
        }

[ThatThatGuy]

where's the error?............................................ ..........