How can I merge two lists when they have different types?

Question

var orderedStudents = students.OrderBy(x => x.FacultyNumber).ToList();
var orderedWorkers = workers.OrderByDescending(x => x.moneyPerHour).ToList();

Those are the two lists that I want to merge, but I can't figure out how since they have different types.

Why would you want to merge them? What manipulation or data extraction do you want to do on them? — ErikE
– ErikE, Commented Nov 24, 2015 at 20:44
Those are two classes with name, lastName and few more properties. I need to put them in one list and sort them by NAME. — Денислав Ангелов
– Денислав Ангелов, Commented Nov 24, 2015 at 20:45
Since the main point of contention is that they are different types, you should update the question to at least show the types of the things. — Evan Trimboli
– Evan Trimboli, Commented Nov 24, 2015 at 20:50

steavy · Accepted Answer · 2015-11-24 20:46:30Z

5

Either derive them from common base class and then you would use sth like

var humanBeings = orderedStudents.Cast<Human>().Concat(orderedWorkers.Cast<Human>()).ToList();

or .. cast them to common base class :) object

answered Nov 24, 2015 at 20:46

steavy

1,5866 gold badges20 silver badges46 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

KiwiPiet · Accepted Answer · 2015-11-24 20:49:48Z

-1

Another option : Create a class that contains the common properties

class Person {
    public string Name { get; set; }
    public string Lastname { get; set; }
}

var orderedStudents = students.OrderBy(x => x.FacultyNumber).Select(x => new Person { Name = x.Name, Lastname = x.Lastname});
var orderedWorkers = workers.OrderByDescending(x => x.moneyPerHour).Select(x => new Person { Name = x.Name, Lastname = x.Lastname});
var mergedList = orderedStudents.Concat(orderedWorkers).ToList();

answered Nov 24, 2015 at 20:49

KiwiPiet

1,33414 silver badges21 bronze badges

3 Comments

steavy Over a year ago

Probably would be better to use base class instead of manual copying.(if possible, ofc) More OOP-ish I would say.

KiwiPiet Over a year ago

As with most things in software development, it depends. If you have a base class or interface with the required properties, or you can add it then yes. If not then this is just another option ;)

steavy Over a year ago

Yes, sure. Sometimes even adding a single field is a huge pain :) Not even speaking about changing model hierarchy

Collectives™ on Stack Overflow

How can I merge two lists when they have different types?

2 Answers 2

Comments

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related