在Autofac中,可以使用装饰器模式来为注册的服务添加多个装饰器。下面是一个示例代码,演示了如何注册多个服务并为每个服务添加多个装饰器。
首先,我们需要定义一个接口和实现类作为服务:
public interface IService
{
void Execute();
}
public class Service : IService
{
public void Execute()
{
Console.WriteLine("Executing service...");
}
}
然后,我们定义多个装饰器,分别对服务进行装饰:
public interface IDecorator : IService
{
}
public class Decorator1 : IDecorator
{
private readonly IService _service;
public Decorator1(IService service)
{
_service = service;
}
public void Execute()
{
Console.WriteLine("Decorator1 - Before executing service...");
_service.Execute();
Console.WriteLine("Decorator1 - After executing service...");
}
}
public class Decorator2 : IDecorator
{
private readonly IService _service;
public Decorator2(IService service)
{
_service = service;
}
public void Execute()
{
Console.WriteLine("Decorator2 - Before executing service...");
_service.Execute();
Console.WriteLine("Decorator2 - After executing service...");
}
}
接下来,我们可以使用Autofac来注册服务和装饰器,并创建一个容器来解析服务:
var builder = new ContainerBuilder();
// 注册服务
builder.RegisterType().As();
// 注册装饰器
builder.RegisterDecorator();
builder.RegisterDecorator();
var container = builder.Build();
// 解析服务
var service = container.Resolve();
service.Execute();
输出结果将会是:
Decorator2 - Before executing service...
Decorator1 - Before executing service...
Executing service...
Decorator1 - After executing service...
Decorator2 - After executing service...
在这个示例中,我们先注册了一个Service
作为服务,然后使用RegisterDecorator
方法分别注册了Decorator1
和Decorator2
作为IService
的装饰器。当我们解析IService
时,Autofac会自动应用这些装饰器,并按照注册的顺序进行装饰。
请注意,Autofac的RegisterDecorator
方法是从Autofac.Extras.Decorators库中提供的扩展方法,需要安装相应的NuGet包。