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c#javareflection
Demetrio Neto
Demetrio Neto

Reputation: 101

How to do something like "Class<? extends MyClass >" in C#

I need to use reflection in C# and i know it have a Type object that let you work with reflection like Java's Class do, but i need to specify a type or subtypes like the Java code below:

public class Test{

    class Test2 extends Test { }        

    public static void doSomething(Class<? extends Test> myClass){
        //doSomething with class...
    }

    public static void main(String[] args){
        doSomething(Test2.class); //ok
        doSomething(String.class); //error
    }

}

Upvotes: 1

Views: 343

Answers (2)

vulkanino
vulkanino

Reputation: 9134

Maybe you want constraints on type parameters?

public class Student<T> where T : Person

http://msdn.microsoft.com/en-us/library/d5x73970.aspx

Upvotes: 1

Andre Loker
Andre Loker

Reputation: 8408

In the .NET framework, Type isn't generic. There's only one type Type. You can't specific that you only want a Type that describes a type derived from a given type, at least not statically.

You can of course do

public class Test
{
    public void DoSomething(Type myClass)
    {
        if(!typeof(Test).IsAssignableFrom(myClass))
        {
            throw new ArgumentException("myClass must refer to Test or a derived class", "myClass");
        }
    }
}

Upvotes: 3

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