使用反射发现派生类型 [英] Discovering derived types using reflection

问题描述

使用反射，是否可以发现从给定类型派生的所有类型?

Using reflection, is it possible to discover all types that derive from a given type?

大概范围将被限制在单个程序集中.

Presumably the scope would be limited to within a single assembly.

推荐答案

与 Darin 的几乎相同，但在这里..

pretty much the same as Darin's but here you go..

    public static List<Type> FindAllDerivedTypes<T>()
    {
        return FindAllDerivedTypes<T>(Assembly.GetAssembly(typeof(T)));
    }

    public static List<Type> FindAllDerivedTypes<T>(Assembly assembly)
    {
        var derivedType = typeof(T);
        return assembly
            .GetTypes()
            .Where(t =>
                t != derivedType &&
                derivedType.IsAssignableFrom(t)
                ).ToList();

    } 

用于:

var output = FindAllDerivedTypes<System.IO.Stream>();
            foreach (var type in output)
            {
                Console.WriteLine(type.Name);
            }

输出:

NullStream
SyncStream
__ConsoleStream
BufferedStream
FileStream
MemoryStream
UnmanagedMemoryStream
PinnedBufferMemoryStream
UnmanagedMemoryStreamWrapper
IsolatedStorageFileStream
CryptoStream
TailStream

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