Console.WriteLine((serviceA== serviceAAA).ToString());//scope 之外和 scope 内是不同的对象} Transient 表示每一次 ServiceProvider 都会创建新的实例. 什么时候应该使用什么呢? 参考:Stack Overflow – AddTransient, AddScoped and AddSingleton Services Differences Interface Best Practice 上面的例子中, 直接...
以订单服务类作为示例,增加接口类与实现类。 public interface IOrderService {voidAutoCancel(); } publicclassOrderService:IOrderService { publicvoidAutoCancel(){ Console.WriteLine("Order canceled!"); } } 注册到服务容器中,此处使用瞬时的生命周期。 services.AddTransient<IOrderService, OrderService>(); 构...
publicclassIndexModel:PageModel{privatereadonly IMyDependency _myDependency;publicIndexModel(IMyDependency myDependency,OperationService operationService,IOperationTransient transientOperation,IOperationScoped scopedOperation,IOperationSingleton singletonOperation,IOperationSingletonInstance singletonInstanceOperation){_myDep...
The third injection approach, the Property Injection, is not supported by the built-in IoC Container. “Discover how to leverage the built-in IoC Container in your .NET Core console application.”Tweet This Dependency Injection in a Console Application In the previous section, you implemented Depe...
Console.WriteLine( $"MyDependency.WriteMessage called. Message:{message}"); returnTask.FromResult(0); } } 一个MyDependency类被创建使WriteMessage方法对另一个类可用。 MyDependency类是IndexModel类的依赖(即IndexModel类的创建需要用到MyDependency类): ...
services.AddTransient<MyApplication>(); services.AddScoped<IBusinessLayer, BusinessLayer>(); services.AddSingleton<IDataAccessLayer, CDataAccessLayer>(); }) Initialize the Host Initialize the Host with all dependencies, 1 _host = builder.Build(); ...
namespace DependencyInjection.Example; public class MessageWriter : IMessageWriter { public void Write(string message) { Console.WriteLine($"MessageWriter.Write(message: \"{message}\")"); } } The sample code registers the IMessageWriter service with the concrete type MessageWriter. The AddSingleto...
TryAddTransient:对应AddTransient TryAddScoped:对应AddScoped TryAddSingleton:对应AddSingleton TryAddEnumerable:这个和TryAdd的区别是,TryAdd仅根据服务类型来判断是否要进行注册,而TryAddEnumerable则是根据服务...
In Dependency Injection (DI), the terms "scoped", "transient", and "singleton" are used to describe the different lifetimes or lifecycles of objects managed by the DI container. These lifetimes determine how instances of dependencies are created and managed by the container. ...
IServiceCollection also includes the AddTransient(Type serviceType, Type implementationType) and AddTransient(Type serviceType, Func<IServiceProvider, TService> implementationFactory) extension methods. These are similar to AddSingleton except they return a new instance every time they’re invoked, ensuri...