.net连接VF数据库

System.Data.ODBC.ODBCConnection conn = new System.Data.ODBC.ODBCConnection();   
      string table = filename;
      string connStr = @"Driver={Microsoft Visual FoxPro Driver};SourceType=DBF;SourceDB=" + path + ";Exclusive=No;NULL=NO;Collate=Machine;BACKGROUNDFETCH=NO;DELETED=NO";
        conn.ConnectionString = connStr;
        conn.Open();
        ODBCCommand cmd = new ODBCCommand();
        cmd.Connection = conn;
        string sql = "select * from T_tdd";
        cmd.CommandText = sql;
        cmd.CommandType = CommandType.Text;