获取各类执行具体的开放式泛型类型 [英] Get all types implementing specific open generic type

问题描述

我如何得到实现特定开放式泛型类型所有类型

How do I get all types that implementing a specific open generic type?

例如：

public interface IUserRepository : IRepository<User>

找到实现各类 IRepository<>

public static IEnumerable<Type> GetAllTypesImplementingOpenGenericType(Type openGenericType, Assembly assembly)
{
  ...
}

推荐答案

这将返回继承的通用基础类的所有类型。没有继承的通用接口。

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;

这将返回所有类型，包括接口，摘要，并且具有开放式泛型类型的具体类型。其继承链

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;
}

这第二种方法将找到的 ConcreteUserRepo 和<强> IUserRepository 在这个例子：

This second method will find ConcreteUserRepo and IUserRepository in this example:

public interface ConcreteUserRepo : IUserRepository
{}

public interface IUserRepository : IRepository<User>
{}

public interface IRepository<User>
{}

public class User
{}

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