[英]Efficient linq query to return objects when you have a list of object id's
I have a List of all my peronIDs and I'd like to run a Linq query that retrieves the remaining details. 我有一个包含所有peronID的列表,我想运行一个Linq查询来检索剩余的详细信息。
This is my code, but I believe that it checks every item in my People db table against every item in my personID's list which is inefficient: 这是我的代码,但我相信它会检查我的People数据库表中的每个项目,而不是我的personID列表中的每个项目都是低效的:
List<int> personIDs = Session["PeopleList"] as List<int>;
var people = (from c in db.People
where (
from a in personIDs
where a == c.PersonID
select a
).Any()
select c);
Is there a more efficient way to run this code? 有没有更有效的方法来运行此代码?
You can do it this way: 你可以这样做:
var people = (from c in db.People
where personIDs.contains(c.id)
select c).ToList();
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