Question

我使用Autofac进行DI和MVVM。我有一个注册的全球服务：

@PrePersist Executed before the entity manager persist operation is actually executed or cascaded. This call is synchronous with the persist operation.
@PreRemove  Executed before the entity manager remove operation is actually executed or cascaded. This call is synchronous with the remove operation.
@PostPersist    Executed after the entity manager persist operation is actually executed or cascaded. This call is invoked after the database INSERT is executed.
@PostRemove Executed after the entity manager remove operation is actually executed or cascaded. This call is synchronous with the remove operation.
@PreUpdate  Executed before the database UPDATE operation.
@PostUpdate Executed after the database UPDATE operation.
@PostLoad   Executed after an entity has been loaded into the current persistence context or an entity has been refreshed.

我还使用Autofac.Extras.NLog实现了明显的日志记录目的：

builder.RegisterType<MyGlobalService>().As<IGlobalService>().SingleInstance();

这样我可以在任何一个ViewModel中获取该服务和记录器的实例：

builder.RegisterModule<NLogModule>();

效果很好。现在我还希望在MyGlobalService中提供日志记录支持。但这一次，我想使用Property Injection，而不是Constructor Injection。

问题是：我应该以不同的方式注册这样的规则吗？

使用示例：

namespace MyNameSpace.ViewModels
{
    class MyViewModel : BindableBase
    {
        readonly IGlobalService _globalService;
        readonly ILogger _logger;

        public MyViewModel (IGlobalService globalService, ILogger logger)
        {
            _globalService = globalService;
            _logger = logger;

}}}(...)

编辑：在下面回答。

Answer 1

Property Injection无法开箱即用，您需要设置要使用属性注入的类，所以

builder.RegisterType<MyGlobalService>().As<IGlobalService>().PropertiesAutowired().SingleInstance();

应该做的伎俩。或者您可以使用OnActivating终身事件手动执行此操作。

已注册的服务中的Autofac Property Injection

1 个答案: