C#: How to get a names of subclasses and put them in collection using generic method

Question

Here is a problem:

There is a parent class Class01 which has 2 subclasses: Subclass0101 and Subclass0102. Class01 and its subclasses are not instantiated yet. We need to

Enumerate all subclasses in Class01.
Put them into the list collection and output the content of that collection.
Make that as much generic as possible, using the name of the parent class (like <Class1> or so - I am not sure if the notation is correct). That is so that this method would be universal if we have Class02 with subclasses SubClass0201 and SubClass0202.

Would you be so kind to help we with the code composition as I was unable to compose the existing answers into one project? Thank you very-very much in advance!!!

Here are my intentions:

namespace Temp
{
    class Program
    {
        static void Main(string[] args)
        {

        // Not sure what to put here
        Show<Class01>

        // Not sure what to put here
        public static Show<T1>
        {
            // and here
        }
    }

    class Class01 {}

    class SubClass0101 : Class01 {}

    class SubClass0102 : Class01 { }

    class Class02 { }

    class SubClass0201 : Class02 { }

    class SubClass0202 : Class02 { }
}

so do you have a `List` or are you just trying to initialize some classes for some reason? — Sayse, Aug 15 '14 at 08:42

score 1 · Answer 1 · answered Aug 15 '14 at 08:44

1

Assuming the subclasses are in the same assembly:

public static IEnumerable<Type> GetAllSubTypesInSameAssembly(this Type type)
{
    return type.Assembly
               .GetTypes()
               .Where(t => t != type && type.IsAssignableFrom(t));
}

answered Aug 15 '14 at 08:44

Lucas Trzesniewski

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And assuming an interface is a subclass? – CodeCaster Aug 15 '14 at 08:46
This works for interfaces too. – Lucas Trzesniewski Aug 15 '14 at 08:48
That's the problem, OP didn't ask for that. – CodeCaster Aug 15 '14 at 08:48
1

Then replace `type.IsAssignableFrom(t)` with `t.IsSubclassOf(type)`. I thought the broader method would be better. – Lucas Trzesniewski Aug 15 '14 at 08:51
Thank you very much for your help!!! I have not how to resolve the task now, but I've got it has something to do with the reflection, activators and assembles!!! Thanks a lot, will work on it :) – Tracey23 Aug 15 '14 at 09:47

C#: How to get a names of subclasses and put them in collection using generic method

1 Answers1