C＃列表 <Items> 与DateTime获取过去6周的全部

Question

I have a List and Item contains a DateTime property. The list is populated with a lot of data.

I need to get the last 6 weeks items from today.

I'm thinking to do it like this:

6 weeks = 6 weeks x 7 days = 42 days

DateTime today = DateTime.Now;

DateTime startDate = today.AddDays(42);

List<Item> list = list.Where(t=>t.Created.Date >= startDate.Date && t.Created.date <= today.Date)

Is there a better way to achieve the same?

Answer 1

You can use a TimeSpan and DateTime.Subtract to achieve the same thing in an (arguably) more idiomatic form.

var sixWeeks = TimeSpan.FromDays(42);
var list = source.Where(t=>t.Created.Date >= DateTime.Now.Date.Subtract(sixWeeks));