EntityFramework - contains query of composite key

Question

given a list of ids, I can query all relevant rows by:

context.Table.Where(q => listOfIds.Contains(q.Id));

But how do you achieve the sa

Answer 1

You can create a collection of strings with both keys like this (I am assuming that your keys are int type):

var id1id2Strings = listOfIds.Select(p => p.Id1+ "-" + p.Id2);

Then you can just use "Contains" on your db:

using (dbEntities context = new dbEntities())
            {
                var rec = await context.Table1.Where(entity => id1id2Strings .Contains(entity.Id1+ "-" + entity.Id2));
                return rec.ToList();
            }