用于存储库和工作模式单元的DI

Previously I have had parameterless repositories being injected into my MVC controllers:

以前，我曾将无参数存储库注入到我的MVC控制器中:

ProjectRepository implementation:

ProjectRepository实现:

public class ProjectRepository : EntityFrameworkRepository<Project>, IProjectRepository
{
    public ProjectRepository()
    { }
}

UnityConfig.cs dependency resolution:

UnityConfig。cs依赖分辨率:

container.RegisterType<IProjectRepository, ProjectRepository>();

MVC Controller:

MVC控制器:

private IProjectRepository _projectRepository { get; set; }

public ProjectController(IProjectRepository projectRepository)
{
    _projectRepository = projectRepository;
}

This worked great.

这个伟大的工作。

Now I have implemented a Unit of Work pattern into my repository classes so that I can commit transactional changes to data (especially when changes are being made to more than one repository).

现在我已经在我的存储库类中实现了一个工作模式单元，这样我就可以向数据提交事务更改(特别是在对多个存储库进行更改时)。

The new ProjectRepository implementation accepts a IUnitOfWork in its constructor:

新的ProjectRepository实现在其构造器中接受IUnitOfWork:

public class ProjectRepository : EntityFrameworkRepository<Project>, IProjectRepository
{
    public ProjectRepository(IUnitOfWork unitOfWork): base(unitOfWork)
    { }
}

This means that multiple repositories can share the same IUnitOfWork and changes can be collectively committed using UnitOfWork.SaveChanges().

这意味着多个存储库可以共享相同的IUnitOfWork，可以使用UnitOfWork.SaveChanges()集体提交更改。

QUESTION:

问题:

How do I now use dependency injection to instantiate the repository with an instance of IUnitOfWork?

我现在如何使用依赖项注入用IUnitOfWork实例实例实例化存储库?

public ProjectController(IProjectRepository projectRepository, IUnitOfWork unitOfWork)
{
    _projectRepository = projectRepository;
    _unitOfWork = unitOfWork;
}

There could also be more than one repository injected into the controller. How can these all be instantiated with the same IUnitOfWork?

还可以向控制器注入多个存储库。如何用相同的IUnitOfWork实例化这些?

1 个解决方案

#1

When you register your IUnitOfWork instance, use PerResolveLifetimeManager, this will ensure every dependency of IUnitOfWork within a single IUnityContainer.Resolve gets provided the same instance.

当您注册IUnitOfWork实例时，使用PerResolveLifetimeManager，这将确保在单个IUnityContainer中对IUnitOfWork的每个依赖。Resolve获得相同的实例。

For example:

例如:

public class SomeDependency
{

}

public class Service
{
    public Service(SomeDependency someDependency, SomeDependency someDependency2)
    {
        Console.WriteLine(someDependency == someDependency2); 
    }
}

public static void Main()
{
    using(var container = new UnityContainer())
    {
        container.RegisterType<SomeDependency>(new PerResolveLifetimeManager());
        container.Resolve<Service>();
    }
}

This will output True to the Console.

这将输出True到控制台。

See the page for Understanding Lifetime Managers for further details.

有关更详细的信息，请参阅了解生命周期管理器的页面。

#1