inversion-of-control

问题 I've been trying to get assembly scanning working in my .NET core 2.0 project. The exception I am getting Autofac.Core.Registration.ComponentNotRegisteredException HResult=0x80131500 Message=The requested service 'Microsoft.AspNetCore.Hosting.Internal.WebHostOptions' has not been registered. To avoid this exception, either register a component to provide the service, check for service registration using IsRegistered(), or use the ResolveOptional() method to resolve an optional dependency.

问题 Especially in unittests we use this "design pattern" I call "get class from class level" framworktest.py: class FrameWorkHttpClient(object): .... class FrameWorkTestCase(unittest.TestCase): # Subclass can control the class which gets used in get_response() HttpClient=FrameWorkHttpClient def get_response(self, url): client=self.HttpClient() return client.get(url) mytest.py: class MyHttpClient(FrameWorkHttpClient): .... class MyTestCase(FrameWorkTestCase): HttpClient=MyHttpClient def test

问题 Especially in unittests we use this "design pattern" I call "get class from class level" framworktest.py: class FrameWorkHttpClient(object): .... class FrameWorkTestCase(unittest.TestCase): # Subclass can control the class which gets used in get_response() HttpClient=FrameWorkHttpClient def get_response(self, url): client=self.HttpClient() return client.get(url) mytest.py: class MyHttpClient(FrameWorkHttpClient): .... class MyTestCase(FrameWorkTestCase): HttpClient=MyHttpClient def test

问题 I'm used to using Spring to do my dependency injection like so: <context:component-scan base-package="org.emmerich.myapp" /> and then annotating my dependent classes with Autowired like so: public class DependentClass { @Autowired private Dependency dependency; } However, with the changes in Hibernate 4.0, we're now advised to use the new Integrator interface for service discovery. This includes adding event listeners for triggers such as postUpdate , postDelete etc. Unfortunately, this doesn

问题 I'm used to using Spring to do my dependency injection like so: <context:component-scan base-package="org.emmerich.myapp" /> and then annotating my dependent classes with Autowired like so: public class DependentClass { @Autowired private Dependency dependency; } However, with the changes in Hibernate 4.0, we're now advised to use the new Integrator interface for service discovery. This includes adding event listeners for triggers such as postUpdate , postDelete etc. Unfortunately, this doesn

问题 My question based on InventorySampleApp by Microsoft. The ServiceLocator contains method Configure() that register Services and ViewModels. With method GetService<T>() we can get it. For example, ProductView.cs : ViewModel = ServiceLocator.Current.GetService<ProductDetailsViewModel>(); Each *ViewModel contains constructor with interface, for example: public ProductDetailsViewModel(IProductService productService, IFilePickerService filePickerService, ICommonServices commonServices) I can't

问题 I'm confused about the patterns: ViewModelLocator , ServiceLocator , Dependency Injection . The latest conclusion are as follows: ViewModelLocator . The place to connect View and ViewModel . public ViewModelLocator() { SimpleIoc.Default.Register<MainViewModel>(); SimpleIoc.Default.Register<SettingViewModel>(); } public MainViewModel MainViewModel => SimpleIoc.Default.GetInstance<MainViewModel>(); public SettingViewModel SettingViewModel => SimpleIoc.Default.GetInstance<SettingViewModel>(); //

问题 I've spent a lot of time reading these articles (along with many others): Mark Seemann - Pure DI Mark Seemann - When to use a DI Container Mark Seemann - Compose object graphs with confidence Mark Seemann - Don't call the container; it'll call you Mark Seemann - Understanding the Composition Root and I'm still trying to wrap my head around DI and the concept of "wiring up the dependencies" and the "auto wiring" functionality of an IoC container. I think I understand the theory of Dependency

问题 I'm trying to figure out how to use Simple Injector, I've used it around the project with no problems registering simple services and their components. However, I wanted to use dependency injector when having a component with more than two constructors that implements an interface. public DAL: IDAL { private Logger logger; string _dbInstance; public DAL() { logger = new Logger(); } public DAL(string databaseInstance) { logger = new Logger(); _dbInstance = databaseInstance; } } Here is how I'm

问题 The following is an approximation of the problem I'm facing. Think we have a password validator with some rules. public interface RuleChecker{ //Checks for a password strenght, returns 10 //for strong or 0 for soft password. int check(String pass); } And then we have several implementations, our service will only accept the password if it is over 8 score. public class NoCheck implements RuleChecker { public int check(String pass){return 10;} } public class LengthCheck implements RuleChecker{