Question

I have two different lists where one is a bunch of ID’s as in a List<int> idsList, the other however is a list of objects like List<MyObject> myObjectList where the object looks like this:

class MyObject{
    private List<int> ids;

     public MyObject(List<int> ids){
      this.ids = ids;
     }

     public List<int> Ids{
       get{
          return ids;
       }
     }
}

As you can see each object can contain one or multiple IDs (never zero or null ids). So what I need at the end is to know what objects in myObjectList have any id(s) from my idsList.
So far if I do:

var ids = from g in onScreen where g.Ids.Contains(myIntVariable) select g;

it would give me a list of the object(s) that contain myIntVariable. What I do not know how to do is to match the content of the idsList with the list in MyObject.
Thanks!

Answer 1

One way to go:

var listOfMyObjectsContainingAnIdFromIdsList = myObjectList.Where(myObject => myObject.Ids.Any(id => idsList.Contains(id)));