可移植类库反射 [英] Portable Class Library Reflection

问题描述

我目前正在尝试将Xamarin.iOS应用程序库转换为PCL(配置文件78).我有无法编译的代码:

 public static void RegisterAllCommandHandlers(IEnumerable<Assembly> assemblies) {
            // Get all types that are concrete classes which implement ICommandHandler
            var commandHandlerOpenGenericType = typeof(ICommandHandler<>);
            var types = new List<Type>();
            foreach (var assembly in assemblies) {
                types.AddRange(assembly.GetTypes()
                      .Where(x => x.IsClass && !x.IsAbstract && x.GetInterfaces().Any(i => i.IsGenericType && i.GetGenericTypeDefinition() == commandHandlerOpenGenericType)));
            }
    }

以下是编译器错误的图像:

如何使用新的反射API做同样的事情?

解决方案

这是由于type/typeinfo拆分所致.请参见演进反射API .

尝试以下代码:

assembly.DefinedTypes
    .Where(x => x.IsClass && !x.IsAbstract && x.ImplementedInterfaces
        .Any(i => i.GetTypeInfo().IsGenericType && i.GetGenericTypeDefinition() == commandHandlerOpenGenericType))
    .Select(x => x.AsType())

I am currently trying to convert a Xamarin.iOS app library to a PCL (Profile 78). I have this code that will not compile:

 public static void RegisterAllCommandHandlers(IEnumerable<Assembly> assemblies) {
            // Get all types that are concrete classes which implement ICommandHandler
            var commandHandlerOpenGenericType = typeof(ICommandHandler<>);
            var types = new List<Type>();
            foreach (var assembly in assemblies) {
                types.AddRange(assembly.GetTypes()
                      .Where(x => x.IsClass && !x.IsAbstract && x.GetInterfaces().Any(i => i.IsGenericType && i.GetGenericTypeDefinition() == commandHandlerOpenGenericType)));
            }
    }

Here is an image of the compiler errors:

How can I do the same thing with the new reflection API?

解决方案

This is due to the type/typeinfo split. See Evolving the Reflection API.

Try this code:

assembly.DefinedTypes
    .Where(x => x.IsClass && !x.IsAbstract && x.ImplementedInterfaces
        .Any(i => i.GetTypeInfo().IsGenericType && i.GetGenericTypeDefinition() == commandHandlerOpenGenericType))
    .Select(x => x.AsType())

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