Question

我已尝试使用Scrutor之类的here：

   services.Scan(scan => scan.FromAssemblies(typeof(IQueryHandler<,>).Assembly)
    .AddClasses(classes => classes.AssignableTo(typeof(IQueryHandler<,>)))
        .AsImplementedInterfaces()
        .WithScopedLifetime());

并且它没有注册任何QueryHandler。但对于命令

   services.Scan(scan => scan.FromAssemblies(typeof(ICommandHandler<>).Assembly)
        .AddClasses(classes => classes.AssignableTo(typeof(ICommandHandler<>)))
            .AsImplementedInterfaces()
            .WithScopedLifetime());

它有效。我有什么不对吗？我试过跟随：

var queryTypes = typeof(IQuery<>)
        .GetTypeInfo()
        .Assembly.GetTypes()
            .Where(t => t.GetTypeInfo() != null
                && !t.GetTypeInfo().IsInterface && !t.GetTypeInfo().IsAbstract
                && t.GetTypeInfo().ImplementedInterfaces.Any(i => i.Name.Equals("IQuery`1")));

    var handlerTypes = typeof(IQueryHandler<,>)
        .GetTypeInfo()
        .Assembly.GetTypes()
            .Where(t => t.GetTypeInfo() != null && !t.GetTypeInfo().IsInterface
                && !t.GetTypeInfo().IsAbstract
                && t.GetTypeInfo().ImplementedInterfaces.Any(i => i.Name.Equals("IQueryHandler`2")));

    var closedHandlers = queryTypes.Select(t => typeof(IQueryHandler<,>).MakeGenericType(t, t.GetTypeInfo().ImplementedInterfaces.First().GenericTypeArguments[0]));

    foreach (var closedHandler in closedHandlers)
    {
        // services.AddTransient(typeof(IQueryHandler<,>), closedHandler);
        var implementation = handlerTypes.FirstOrDefault(t => t.GetTypeInfo().ImplementedInterfaces.Any(i => i.FullName.Equals(closedHandler.FullName)));
        if (implementation != null)
        {
            // services.AddTransient(typeof(IQueryHandler<,>), implementation);
            services.AddTransient(closedHandler, implementation);
        }
    }

并且在服务竞争中似乎是正确的，但解决崩溃。如果不使用某些第三方容器，这可能吗？ THX

更新＃1：

现在它可以将foreach更新为：

foreach (var closedHandler in closedHandlers)
        {
            // services.AddTransient(typeof(IQueryHandler<,>), closedHandler);
            var implementation = handlerTypes.FirstOrDefault(t => t.GetTypeInfo().ImplementedInterfaces.Any(i => i.FullName.Equals(closedHandler.FullName)));
            var imp = implementation.MakeGenericType(closedHandler.GenericTypeArguments[0], closedHandler.GenericTypeArguments[1]);
            if (implementation != null)
            {
                // services.AddTransient(typeof(IQueryHandler<,>), implementation);
                services.AddTransient(closedHandler, imp);
            }
        }

但它必须严格实现那些具有完全通用参数计数的接口。无论如何，我会尽力找到更好的方法

DI MVC 6 - 注册泛型

0 个答案: