.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;