How to compare two types of classes which receives generics?

Asked Jul 05 '16 at 13:30

Active Jul 05 '16 at 15:31

Viewed 42 times

I am trying to see if an object is of a specified type, but that type receives a generic, and I don't know how to do this check. For example let's say I have a class:

public class MyClass<T> where T : class
{
    private T Prop { get; set; }
}

and an empty class:

public class A : Object
{
}

Instantiating an object of MyClass with given type of A and comparing this object type to MyClass but which receives a type of Object will always return false, like in the following case:

class Program
{
    static void Main(string[] args)
    {
        var test = new MyClass<A>();
        bool result = test is MyClass<Object>;
        Console.WriteLine(result.ToString());
    }
}

Here the type of A is Object, but the result will be always false.

In this case I just want to check if the object test has the type of MyClass, whatever T will be. How am I supposed to do this?

edited Jul 05 '16 at 15:31

marc_s

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asked Jul 05 '16 at 13:30

meJustAndrew

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The type of `A` is *not* `object`. `MyClass` and `MyClass – Cody Gray - on strike Jul 05 '16 at 13:33
3

`var type = test.GetType(); bool result = type.IsGenericType && type.GetGenericTypeDefinition() == typeof(MyClass<>);` – quetzalcoatl Jul 05 '16 at 13:33
try this `test is MyClass<>;` – M.kazem Akhgary Jul 05 '16 at 13:34
@M.kazemAkhgary: does not compile. – quetzalcoatl Jul 05 '16 at 13:34
@quetzalcoatl thank you! Can you turn your comment into an answer? – meJustAndrew Jul 05 '16 at 13:38
Glad to help! nah, there's already an answer in the linked post, see Nathan's answer (..or Gabe's or .. just not the accepted one :) it sometimes happens that the accepted one is actually not the best one) – quetzalcoatl Jul 05 '16 at 13:43
@quetzalcoatl , shoud I reopen the question if I need to compare a class which receives 2 generics? The code in that answer does not compile in this case – meJustAndrew Jul 05 '16 at 13:46
Just guessing - for 2+ generic parameters, it's `typeof(MyClass<,,,,,>)` - with as many commas as needed to mark all generic params - does that solve it? If so, then no, please leave it as it is. But if it's some other problem, then I'd say you should create another question about the new problem – quetzalcoatl Jul 05 '16 at 13:52
@quetzalcoatl Great! Thank you! – meJustAndrew Jul 05 '16 at 13:54

How to compare two types of classes which receives generics?

0 Answers0