如果我不使用DI容器，则不必在MVC3应用程序中引用EntityFramework库，而只需引用我的DAL / Repo层的业务层即可。
您可以创建一个名为“ DependencyResolver”的单独项目。在此项目中，您必须引用所有库。
现在，UI层不需要NHibernate / EF或任何其他与UI不相关的库，除了Castle Windsor可以被引用。
如果要在UI层中隐藏Castle Windsor和DependencyResolver，则可以编写一个HttpModule来调用IoC注册表内容。
我只有一个StructureMap的例子：
public class DependencyRegistrarModule : IHttpModule
{
private static bool _dependenciesRegistered;
private static readonly object Lock = new object();
public void Init(HttpApplication context)
{
context.BeginRequest += (sender, args) => EnsureDependenciesRegistered();
}
public void Dispose() { }
private static void EnsureDependenciesRegistered()
{
if (!_dependenciesRegistered)
{
lock (Lock)
{
if (!_dependenciesRegistered)
{
ObjectFactory.ResetDefaults();
// Register all you dependencies here
ObjectFactory.Initialize(x => x.AddRegistry(new DependencyRegistry()));
new InitiailizeDefaultFactories().Configure();
_dependenciesRegistered = true;
}
}
}
}
}
public class InitiailizeDefaultFactories
{
public void Configure()
{
StructureMapControllerFactory.GetController = type => ObjectFactory.GetInstance(type);
...
}
}
DefaultControllerFactory并不直接使用IoC容器，而是将其委托给IoC容器方法。
public class StructureMapControllerFactory : DefaultControllerFactory
{
public static Func<Type, object> GetController = type =>
{
throw new InvalidOperationException("The dependency callback for the StructureMapControllerFactory is not configured!");
};
protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)
{
if (controllerType == null)
{
return base.GetControllerInstance(requestContext, controllerType);
}
return GetController(controllerType) as Controller;
}
}
的GetController代表是在StructureMap登记处（在Windsor它应该是一个安装程序）设置。
