Question

我有这个标准的LINQ

var sidEvents = (from f in AppDelegate.Self.Subscription.Fred
                                          from s in f.Sid
                                          from e in s.Eve
                                          where e.date >= oneWeek
                                          select new {Title = e.type, Data = e.data, Date = e.date}).ToList();

我已经改变了一些东西，现在我得到一个Eve对象的列表，其中的where条件就像这样

var sidEvents = AppDelegate.Self.DBManager.GetListOfEvents("type", "EatingOut").Where(t => t.date >= oneWeek).ToList();

有没有办法可以扩展这个LINQ查询以包含原始LINQ查询中的select new {...}？

Answer 1

var sidEvents = AppDelegate.Self.DBManager.GetListOfEvents("type", "EatingOut")
                    .Where(t => t.date >= oneWeek)
                    .Select(e => new { Title = e.type, Data = e.data, Date = e.date }).ToList();

Answer 2

也许你正在寻找这个：

var sidEvents = AppDelegate.Self.DBManager.GetListOfEvents("type", "EatingOut")
                   .Where(t => t.date >= oneWeek)
                   .Select(e => new {...})

Answer 3

如果您更熟悉LINQ查询语法，可以

将第二个查询从方法语法转换为查询语法

var sidEvents = (from t in AppDelegate.Self.DBManager.GetListOfEvents("type", "EatingOut")
                 where t.date >= oneWeek
                 select t).ToList();

然后将select t部分替换为new表达式。

内联在LINQ中选择新的

3 个答案: