How do I get all types that implementing a specific open generic type?
For instance:
public interface IUserRepository : IRepository<User>
Find all types that implement IRepository<>
.
public static IEnumerable<Type> GetAllTypesImplementingOpenGenericType(Type openGenericType, Assembly assembly)
{
...
}
This will return all types that inherit a generic base class. Not all types that inherit a generic interface.
var AllTypesOfIRepository = from x in Assembly.GetAssembly(typeof(AnyTypeInTargetAssembly)).GetTypes()
let y = x.BaseType
where !x.IsAbstract && !x.IsInterface &&
y != null && y.IsGenericType &&
y.GetGenericTypeDefinition() == typeof(IRepository<>)
select x;
This will return all types, including interfaces, abstracts, and concrete types that have the open generic type in its inheritance chain.
public static IEnumerable<Type> GetAllTypesImplementingOpenGenericType(Type openGenericType, Assembly assembly)
{
return from x in assembly.GetTypes()
from z in x.GetInterfaces()
let y = x.BaseType
where
(y != null && y.IsGenericType &&
openGenericType.IsAssignableFrom(y.GetGenericTypeDefinition())) ||
(z.IsGenericType &&
openGenericType.IsAssignableFrom(z.GetGenericTypeDefinition()))
select x;
}
This second method will find ConcreteUserRepo and IUserRepository in this example:
public class ConcreteUserRepo : IUserRepository
{}
public interface IUserRepository : IRepository<User>
{}
public interface IRepository<User>
{}
public class User
{}