通过反射实现接口 [英] Implementations of interface through Reflection

问题描述

如何在 C# 中通过反射获取接口的所有实现?

How can I get all implementations of an interface through reflection in C#?

推荐答案

答案是这样的；它搜索整个应用程序域——即您的应用程序当前加载的每个程序集.

The answer is this; it searches through the entire application domain -- that is, every assembly currently loaded by your application.

/// <summary>
/// Returns all types in the current AppDomain implementing the interface or inheriting the type. 
/// </summary>
public static IEnumerable<Type> TypesImplementingInterface(Type desiredType)
{
    return AppDomain
           .CurrentDomain
           .GetAssemblies()
           .SelectMany(assembly => assembly.GetTypes())
           .Where(type => desiredType.IsAssignableFrom(type));
}

是这样使用的；

var disposableTypes =  TypesImplementingInterface(typeof(IDisposable));

您可能还希望此函数查找实际的具体类型——即过滤掉抽象、接口和泛型类型定义.

You may also want this function to find actual concrete types -- i.e., filtering out abstracts, interfaces, and generic type definitions.

public static bool IsRealClass(Type testType)
{
    return testType.IsAbstract == false
         && testType.IsGenericTypeDefinition == false
         && testType.IsInterface == false;
}

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