Question

Going nuts over this.

Simple query but its just not working.
I simply need to get the company units that are not currently assigned to any users.

IDs are GUID type.

When debugging I see that there are 2 objects in companyUnits and 1 in userCompanyUnits.
I’m trying to get that 1 companyUnit ( that doesn’t exist in userCompanyunit) to show.
Instead I get no results back.

Any idea what’s wrong with the query? Maybe i can’t compare based on guids ?

var companyUnitsList = from x in companyUnits
                       where !(from c in userCompanyUnits
                               select c.CompanyUnit.Id).Contains(x.Id)
                        select x;

Thanks in advance !

Answer 1

Here’s a way of doing it without using the Except operator, and needing a custom IEqualityComparer:

        List<Tuple<int, string>> allUnits = new List<Tuple<int, string>>();
        allUnits.Add(new Tuple<int, string>(1, "unit1"));
        allUnits.Add(new Tuple<int, string>(2, "unit2"));
        allUnits.Add(new Tuple<int, string>(3, "unit3"));

        List<Tuple<int, string>> assignedUnits = new List<Tuple<int, string>>();
        assignedUnits.Add(new Tuple<int, string>(2, "unit2"));

        var unassigned = allUnits.Where(m => !assignedUnits.Any(asgn => asgn.Item1 == m.Item1));

//Yields unit1 and unit3

• Item1 corresponds to Unit.ID