How to add in main list from sub list data..

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I have one main list:

List<object1> LIST1
object1 have properties: Id, Name
and
List<object2> LIST2
object2 with properties: Id, Name

I wanna try from linq to add from list2 data to list1 to have one flat list with both data...I try by lame way to get that but i want from linq...

What I have tried:

C#

foreach (item in list.selectmenu(a => a.list2).toList())
{
//blalballala
}

Posted 11-Jun-18 22:50pm

Member 11381811

Updated 12-Jun-18 11:57am

Maciej Los

v2

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F-ES Sitecore 12-Jun-18 5:09am

I don't really understand your question but the solution is probably AddRange and possibly SelectMany. AddRange lets you add a list of items to a list;

list1.AddRange(list2.Where(x => x.Prop = 123))

SelectMany turns a list of lists into a single list, if you can understand that :)

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OriginalGriff · Answer 1 · 2018-06-11T23:11:00

You can only do that if object2 is derived from object1 - otherwise you are trying to insert two different type objects into the same list.
You can do it quite easily if they are related:

class Fruit { }
class Apple : Fruit { }
class Banana : Fruit { }
class SampleClass
    {
    public static void Main()
        {

        List<Fruit> fruits = new List<Fruit>() { new Apple(), new Apple() };
        List<Banana> bananas = new List<Banana>() { new Banana(), new Banana() };
        fruits.AddRange(bananas);

        }
    }

But without some relationship between them, you can only combine them into a List of a class from which they both inherit.

George Swan · Answer 2 · 2018-06-12T11:58:00

You could use a Mapper. A Mapper maps one Type to another Type where the property names are the same, the other Type must have a default constructor. A popular Mapper is AutoMapper the one used here is a home-brewed version but the syntax is similar.

C#

List<Animal> animals = new List<Animal>
           {
               new Animal(){Name="Dog",Legs=4},
               new Animal(){Name="Human",Legs=2},
               new Animal(){Name="Spider",Legs=8}

           };
           List<Animal2> animals2 = new List<Animal2>
           {
              new Animal2(){Name="Insect",Legs=6},
               new Animal2(){Name="Fish",Legs=0}

           };
           //     source   target
           Mapper<Animal2, Animal> myMapper=new Mapper<Animal2, Animal>();
           var query = animals2.Select(a => myMapper.Map(a));
           animals.AddRange(query);

How to add in main list from sub list data..

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