.NetCore IOC容器练习

//添加Nuget包Microsoft.Extensions.DependencyInjection
var serviceCollection = new ServiceCollection();
serviceCollection.AddTransient();
serviceCollection.AddSingleton();
serviceCollection.AddScoped();

var serviceProvider = serviceCollection.BuildServiceProvider();
serviceProvider.GetService().SayHello();
foreach (var item in serviceProvider.GetServices())
{
    item.SayHello();
}
serviceProvider.GetService().SayHello();
foreach (var item in serviceProvider.GetServices())
{
    item.SayHello();
}
//仅注册过的方可拿到，此处MyClass未注册，GetService为Null，抛异常
serviceProvider.GetService().SayHello();
//仅注册过的方可拿到，此处MyClass未注册，GetRequiredService提示未注册，抛异常
serviceProvider.GetRequiredService().SayHello();

//需要添加Nuget包：Castle.Windsor.MsDependencyInjection和Castle.Core
//需要添加引用：Castle.Windsor和Castle.Windsor.MsDependencyInjection
//创建容器
Castle.Windsor.WindsorContainer container = new Castle.Windsor.WindsorContainer();
//旧版可以适用如下注册container.AddComponent();
//容器注册组件，并且管理组件的生命周期
container.Register(Component.For().ImplementedBy().LifestyleSingleton().Named("MyClass"));
container.Register(Component.For().ImplementedBy().LifestyleScoped().Named("YouClass"));
container.Register(Component.For().ImplementedBy().LifestyleTransient().Named("TheyClass"));
container.BeginScope();
//组件激活，拿到组件实例
container.Resolve("MyClass").SayHello();
//声明周期为Scoped的，必须执行BeginScoped后开始调用，在下一个BeginScope调用之前，只实例化一次
container.BeginScope();
foreach (var item in container.ResolveAll())
{
    item.SayHello();
}
container.Resolve("YouClass").SayHello();
//声明周期为Scoped的，必须执行BeginScoped后开始调用，在下一个BeginScope调用之前，只实例化一次
container.BeginScope();
foreach (var item in container.ResolveAll())
{
    item.SayHello();
}
//容器释放
container.Dispose();