Get elements from list whose ids are in another

Question

I'm new to C# and I ran into a problem.

I have a custom list of lists of my custom type :

items = [
    {
        id = 1,
        ...
    },
    {
        id = 2, 
        ...
    },
    ...
]

And another list that contains only ids and is a list of strings:

myIds = ["1", "2", "3", ...]

I need to get those elements from items whose ids are in myIds.

How to perform that in a good way as I tried:

var myNewList = items.Where(p => myIds.Any(p2 => myIds[p2] == p.id));

But there is error that string cannont be converted to int?

Answer 1

try this

var myNewList = items.Where(p => myIds.Contains( p.id.ToString)).ToList();

Answer 2

the issue is be because you are comparing int Type with string Type. Try this:

var myNewList = items.Where(p => myIds.Any(p2 => p2 == p.id.ToString());