public static async Task <List <FeedViewModel> > GetFeedsAsync() { var feeds = (await SQLiteService.QueryAllFeeds()).Select(feedinfo => new FeedViewModel(feedinfo)).ToList(); foreach (var feedviewmodel in feeds) { await feedviewmodel.LoadArticlesFromDb(); // 如果需要加载就刷新一次,就在这里加多一个函数 } return(feeds); }