如何在F＃中对查询进行排序？

Question

So I have a query like this one

let query = 
    query {
        for person in people do
        select person
    }

And I'd like to have it sequenced .

let sequence : seq<Person> = query

But I can't find any information on how to do it, maybe I've become bad at using search engines.

I'm getting unexpected type compiling expections using things like |> seq.ofList and ToList() .

The expression was expected to have the type seq<Person> but here has the type Generic.List<Person> .

Answer 1

The result of a query expression has type IQueryable<_> , which is a subtype of IEnumerable<_> (for which seq<_> is a synonym), so you can simply change the type:

let mySeq : seq<_> = myQuery

Or, if you want to avoid a type annotation, use the built-in seq function , which does the same thing:

let mySeq = seq myQuery