public class DependencyAttributeRegistrator {#region Fieldsprivate readonly ITypeFinder _finder;private readonly IContainerManger _containerManger;#endregion#region .ctorpublic DependencyAttributeRegistrator(ITypeFinder finder, IContainerManger containerManger){this._finder = finder;this._containerManger = containerManger;}#endregion#region Methodspublic virtual IEnumerable<AttributeInfo<DependencyAttribute>> FindServices(){foreach (Type type in _finder.FindClassesOfType<object>()){var attributes = type.GetCustomAttributes(typeof (DependencyAttribute), false); //这句是关键 查找所有特性foreach (DependencyAttribute attribute in attributes){yield return new AttributeInfo<DependencyAttribute>{Attribute = attribute,DecorateType = type};}}}public virtual void RegisterServices() {this.RegisterServices(this.FindServices());}public virtual void RegisterServices(IEnumerable<AttributeInfo<DependencyAttribute>> services){services = services.OrderBy(it => it.Attribute.Order);foreach (var info in services){Type serviceType = info.Attribute.ServiceType ?? info.DecorateType;_containerManger.AddComponent(serviceType,info.DecorateType,info.Attribute.Key,info.Attribute.LiftStyle);}}public virtual IEnumerable<AttributeInfo<DependencyAttribute>> FilterServices(IEnumerable<AttributeInfo<DependencyAttribute>> services, params string[] configurationKeys){return services.Where(s => s.Attribute.Configuration == null || configurationKeys.Contains(s.Attribute.Configuration));}#endregion}