IOC容器特性注入第四篇：容器初始化

IOC容器，就是把各种服务都注入到容器里，想要什么就去拿什么，不仅解决服务类和接口类的耦合度还可以提高性能方便管理。

这里封装一个接口类和一个实现类

1.IContainerManager接口

    public interface IContainerManger : IDisposable {
        //#region AddResolvingObserver

        //void AddResolvingObserver(IResolvingObserver observer);

        //#endregion

        #region AddComponent
        void AddComponent<TService>(string key = "", ComponentLifeStyle lifeStyle = ComponentLifeStyle.Singleton);
        void AddComponent(Type type, string key = "", ComponentLifeStyle liftStyle = ComponentLifeStyle.Singleton);
        void AddComponent<TService, TImplementation>(string key = "",
            ComponentLifeStyle liftStyle = ComponentLifeStyle.Singleton);
        void AddComponent(Type service, Type implementation, string key = "",
            ComponentLifeStyle liftStyle = ComponentLifeStyle.Singleton, params  Parameter[] parameters);
        void AddComponentInstance<TService>(object instance, string key = "");
        void AddComponentInstance(object instance, string key = "");
        void AddComponentInstance(Type service, object instance, string key = "");
        #endregion

        #region Resolve
        T Resolve<T>(string key = "", params Parameter[] parameters) where T : class;
        object Resolve(Type type, string key = "", params Parameter[] parameters);
        #endregion

        #region ResolveAll
        T[] ResolveAll<T>(string key = "");
        object[] ResolveAll(Type type, string key = "");
        #endregion

        #region TryResolve
        T TryResolve<T>(string key = "", params Parameter[] parameters);
        object TryResolve(Type type, string key = "", params Parameter[] parameters);
        #endregion

        #region ResolveUnRgeistered(未注册) 
        T ResolveUnregistered<T>() where T : class;
        object ResolveUnregistered(Type type);
        #endregion
    }

也是一样，实例版本和泛型版本都写了，方便使用　

2. ContainerManager实现类

    public class ContainerManager : StandardKernel, IContainerManger {

        #region Fields
        private IKernel _container;
        #endregion

        #region .ctor
        public ContainerManager() {
            _container = new StandardKernel();
            _container.Settings.Set("InjectAttribute", typeof(DaHua.Common.Runtime.Dependency.InjectAttribute));
        }
        #endregion

        #region Properties

        public IKernel Container {
            get {
                return _container;
            }
        }
        #endregion


        #region AddComponent
        public void AddComponent<TService>(string key = "", ComponentLifeStyle lifeStyle = ComponentLifeStyle.Singleton) {
            AddComponent(typeof(TService), typeof(TService), key, lifeStyle);
        }

        public void AddComponent(Type type, string key = "", ComponentLifeStyle liftStyle = ComponentLifeStyle.Singleton) {
            AddComponent(type, type, key, liftStyle);
        }

        public void AddComponent<TService, TImplementation>(string key = "", ComponentLifeStyle liftStyle = ComponentLifeStyle.Singleton) {
            AddComponent(typeof(TService), typeof(TImplementation), key, liftStyle);
        }

        public void AddComponent(Type service, Type implementation, string key = "", ComponentLifeStyle liftStyle = ComponentLifeStyle.Singleton, params  Parameter[] parameters) {
            var binding = _container.Bind(service).To(implementation);
            if (parameters != null) {
                var ninjectParameter = ConvertParameters(parameters);
                foreach (var parameter in ninjectParameter) {
                    binding.WithParameter(parameter);
                }
            }
            binding.PerLifeStyle(liftStyle).MapKey(key).ReplaceExsting(service);
        }
        #endregion

        #region AddComponentInstance
        public void AddComponentInstance<TService>(object instance, string key = "") {
            AddComponentInstance(typeof(TService), instance, key);
        }

        public void AddComponentInstance(object instance, string key = "") {
            AddComponentInstance(instance.GetType(), instance, key);
        }

        public void AddComponentInstance(Type service, object instance, string key = "") {
            _container.Bind(service).ToConstant(instance).MapKey(key).ReplaceExsting(service);
        }
        #endregion

        #region ConvertParameters

        private static NinjectParameters.IParameter[] ConvertParameters(Parameter[] parameters) {
            if (parameters == null) {
                return null;
            }
            return
                parameters.Select(it => new NinjectParameters.ConstructorArgument(it.Name, (context) => it.valueCallback()))
                    .ToArray();
        }
        #endregion

        #region Resolve
        public virtual T Resolve<T>(string key = "", params Parameter[] parameters) where T : class {
            if (string.IsNullOrWhiteSpace(key)) {
                return _container.Get<T>(ConvertParameters(parameters));
            }
            return _container.Get<T>(key, ConvertParameters(parameters));
        }

        public virtual object Resolve(Type type, string key = "", params Common.Runtime.Parameter[] parameters) {
            if (string.IsNullOrWhiteSpace(key))
            {
                return _container.Get(type, ConvertParameters(parameters));
            }
            return _container.Get(type, key, ConvertParameters(parameters));
        }

        #endregion

        #region ResolveAll
        public virtual T[] ResolveAll<T>(string key = "") {
            if (string.IsNullOrWhiteSpace(key))
            {
                return _container.GetAll<T>().ToArray();
            }
            return _container.GetAll<T>(key).ToArray();
        }

        public virtual object[] ResolveAll(Type type, string key = "") {
            if (string.IsNullOrWhiteSpace(key))
            {
                return _container.GetAll(type).ToArray();
            }
            return _container.GetAll(type, key).ToArray();
        }
        #endregion


        #region
        public virtual T TryResolve<T>(string key = "", params Common.Runtime.Parameter[] parameters) {
            if (string.IsNullOrWhiteSpace(key))
            {
                return _container.TryGet<T>(ConvertParameters(parameters));
            }
            return _container.TryGet<T>(key, ConvertParameters(parameters));
        }
    

        public virtual object TryResolve(Type type, string key = "", params Common.Runtime.Parameter[] parameters) {
            if (string.IsNullOrWhiteSpace(key))
            {
                return _container.TryGet(type, ConvertParameters(parameters));
            }
            return _container.TryGet(type, key, ConvertParameters(parameters));
        }

        #endregion

        #region ResolveUnRegistered
        public T ResolveUnregistered<T>() where T : class
        {
            return ResolveUnregistered(typeof (T)) as T;
        }

        public object ResolveUnregistered(Type type)
        {
            var constructors = type.GetConstructors();
            foreach (var constructor in constructors)
            {
                var parameters = constructor.GetParameters();
                var parameterInstances = new List<object>();
                foreach (var parameter in parameters)
                {
                    var service = Resolve(parameter.ParameterType);
                    if(service==null)
                        parameterInstances.Add(service);
                }
                return Activator.CreateInstance(type, parameterInstances.ToArray());
            }
            throw new Exception("构造方法没有发现需要依赖的字段");
        }
        #endregion

        public void Dispose() {
            if (this._container != null && !this._container.IsDisposed)
            {
                this._container.Dispose();

            }
            this._container = null;
        }


    }

 这个类不仅实现了接口还继承Ninject官方类，是为了减少其它程序在做注入的时候减少对Ninject的依赖，有了这个类以后，未来的扩展程序集在注册组件时就不用引用Ninject，对它形成依赖。

下一篇：

IOC容器特性注入第五篇：查找(Attribute)特性注入