C#自定义应用程序上下文对象+IOC自己实现依赖注入

以前的好多代码都丢失了，加上最近时间空一些，于是想起整理一下以前的个人半拉子项目，试试让它们重生。自从养成了架构师视觉 搭建框架之后，越来 越看不上以前搭的框架了。先撸个上下文对象加上实现依赖注入。由于还是要依赖.net 4，所以像Autofac这样的就用不了，于是仿照着实现了。

 

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/// <summary> /// 自定义应用程序上下文对象 /// </summary> public class AppContextExt : IDisposable {     /// <summary>     /// app.config读取     /// </summary>     public Configuration AppConfig { get; set; }     /// <summary>     /// 真正的ApplicationContext对象     /// </summary>     public ApplicationContext Application_Context { get; set; }     //服务集合     public static Dictionary<Type, object> Services = new Dictionary<Type, object>();     //服务订阅事件集合     public static Dictionary<Type, IList<Action<object>>> ServiceEvents = new Dictionary<Type, IList<Action<object>>>();     //上下文对象的单例     private static AppContextExt _ServiceContext = null;     private readonly static object lockObj = new object();     /// <summary>     /// 禁止外部进行实例化     /// </summary>     private AppContextExt()     {     }     /// <summary>     /// 获取唯一实例，双锁定防止多线程并发时重复创建实例     /// </summary>     /// <returns></returns>     public static AppContextExt GetInstance()     {         if (_ServiceContext == null)         {             lock (lockObj)             {                 if (_ServiceContext == null)                 {                     _ServiceContext = new AppContextExt();                 }             }         }         return _ServiceContext;     }     /// <summary>     /// 注入Service到上下文     /// </summary>     /// <typeparam name="T">接口对象</typeparam>     /// <param name="t">Service对象</param>     /// <param name="servicesChangeEvent">服务实例更新时订阅的消息</param>     public static void RegisterService<T>(T t, Action<object> servicesChangeEvent = null) where T : class     {         if (t == null)         {             throw new Exception(string.Format("未将对象实例化，对象名：{0}.", typeof(T).Name));         }         if (!Services.ContainsKey(typeof(T)))         {             try             {                 Services.Add(typeof(T), t);                 if (servicesChangeEvent != null)                 {                     var eventList = new List<Action<object>>();                     eventList.Add(servicesChangeEvent);                     ServiceEvents.Add(typeof(T), eventList);                 }             }             catch (Exception ex)             {                 throw ex;             }         }         if (!Services.ContainsKey(typeof(T)))         {             throw new Exception(string.Format("注册Service失败，对象名：{0}.", typeof(T).Name));         }     }     /// <summary>     /// 动态注入dll中的多个服务对象     /// </summary>     /// <param name="serviceRuntime"></param>     public static void RegisterAssemblyServices(string serviceRuntime)     {         if (serviceRuntime.IndexOf(".dll") != -1 && !File.Exists(serviceRuntime))             throw new Exception(string.Format("类库{0}不存在！", serviceRuntime));         try         {             Assembly asb = Assembly.LoadFrom(serviceRuntime);             var serviceList = asb.GetTypes().Where(t => t.GetCustomAttributes(typeof(ExportAttribute), false).Any()).ToList();             if (serviceList != null && serviceList.Count > 0)             {                 foreach (var service in serviceList)                 {                     var ifc = ((ExportAttribute)service.GetCustomAttributes(typeof(ExportAttribute), false).FirstOrDefault()).ContractType;                     //使用默认的构造函数实例化                     var serviceObject = Activator.CreateInstance(service, null);                     if (serviceObject != null)                         Services.Add(ifc, serviceObject);                     else                         throw new Exception(string.Format("实例化对象{0}失败！", service));                 }             }             else             {                 throw new Exception(string.Format("类库{0}里没有Export的Service！", serviceRuntime));             }         }         catch (Exception ex)         {             throw ex;         }     }     /// <summary>     /// 获取Service的实例     /// </summary>     /// <typeparam name="T">接口对象</typeparam>     /// <returns></returns>     public static T Resolve<T>()     {         if (Services.ContainsKey(typeof(T)))             return (T)Services[typeof(T)];         return default(T);     }     /// <summary>     /// 重置Service对象,实现热更新     /// </summary>     /// <typeparam name="T">接口对象</typeparam>     /// <param name="t">新的服务对象实例</param>     public static void ReLoadService<T>(T t)     {         if (t == null)         {             throw new Exception(string.Format("未将对象实例化，对象名：{0}.", typeof(T).Name));         }         if (Services.ContainsKey(typeof(T)))         {             try             {                 Services[typeof(T)] = t;                 if (ServiceEvents.ContainsKey(typeof(T)))                 {                     var eventList = ServiceEvents[typeof(T)];                     foreach (var act in eventList)                     {                         act.Invoke(t);                     }                 }             }             catch (Exception ex)             {                 throw ex;             }         }         else if (!Services.ContainsKey(typeof(T)))         {             throw new Exception(string.Format("Service实例不存在！对象名：{0}.", typeof(T).Name));         }     }     /// <summary>     /// 激活上下文     /// </summary>     public void Start()     {         GetInstance();     }     /// <summary>     /// 激活上下文     /// </summary>     /// <param name="appContext">真正的ApplicationContext对象</param>     public void Start(ApplicationContext appContext)     {         Application_Context = appContext;         GetInstance();     }     /// <summary>     /// 激活上下文     /// </summary>     /// <param name="config">Configuration</param>     public void Start(Configuration config)     {         AppConfig = config;         GetInstance();     }     /// <summary>     /// 激活上下文     /// </summary>     /// <param name="appContext">真正的ApplicationContext对象</param>     /// <param name="config">Configuration</param>     public void Start(ApplicationContext appContext, Configuration config)     {         AppConfig = config;         Application_Context = appContext;         GetInstance();     }     /// <summary>     /// Using支持     /// </summary>     public void Dispose()     {         Services.Clear();         ServiceEvents.Clear();         if (Application_Context != null)         {             Application_Context.ExitThread();         }     } }

使用：

 AppContextExt.GetInstance().Start();
            AppContextExt.RegisterAssemblyServices(AppDomain.CurrentDomain.BaseDirectory + "ModuleService.dll");

ILogService svr = AppContextExt.Resolve<ILogService>();
            if (svr != null)
                svr.LogInfo("OK");

解决方案截图：