参考自 https://github.com/VictorTzeng/Zxw.Framework.NetCore
安装Autofac，在`project.csproj`加入
<PackageReference Include="Autofac.Configuration" Version="4.0.1" /> <PackageReference Include="Autofac.Extensions.DependencyInjection" Version="4.2.2" />
在`Startup.cs`中创建一个`public IContainer ApplicationContainer { get; private set; }`对象，并把`ConfigureServices`返回类型改为`IServiceProvider`
上下文是用内置IOC创建，**将void的返回值改为`IServiceProvide`**
控制器不能从容器中解析出来; 只是控制器构造函数参数。这意味着控制器生命周期，属性注入和其他事情不由Autofac管理 - 它们由ASP.NET Core管理。可以通过指定AddControllersAsServices()何时向服务集合注册MVC 来更改此设置`services.AddMvc().AddControllersAsServices();`。可以在填充服务之后覆盖控制器注册
`InstancePerRequest`由`InstancePerLifetimeScope`替代
public IContainer ApplicationContainer { get; private set; } public IServiceProvider ConfigureServices(IServiceCollection services) { services.AddSession(a => { a.IdleTimeout = TimeSpan.FromMinutes(20); a.Cookie.HttpOnly = true; }); services.AddDistributedRedisCache(o => o.Configuration = Configuration.GetConnectionString("Redis")); //Add controllers as services so they'll be resolved. services.AddMvc().AddControllersAsServices().AddJsonOptions(options => { //忽略循环引用 options.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore; //不使用驼峰样式的key options.SerializerSettings.ContractResolver = new DefaultContractResolver(); //设置时间格式 options.SerializerSettings.DateFormatString = "yyyy-MM-dd"; }); return InitIoC(services); }
在Startup.cs添加方法
/// <summary> /// IoC初始化 /// </summary> /// <param name="services"></param> /// <returns></returns> private IServiceProvider InitIoC(IServiceCollection services) { IocContainer.Register(Configuration);//注册配置 IocContainer.Register(typeof(BlogContext));//注册EF上下文 IocContainer.Register(Assembly.GetExecutingAssembly());//注册controller return IocContainer.Build(services); }
IocContainer自定义类
/// <summary> /// Autofac Ioc容器 /// </summary> public class IocContainer { private static ContainerBuilder _builder = new ContainerBuilder(); private static IContainer _container; private static string[] _otherAssembly; private static List<Type> _types = new List<Type>(); private static Assembly _assName; private static Dictionary<Type, Type> _dicTypes = new Dictionary<Type, Type>(); /// <summary> /// 注册程序集 /// </summary> /// <param name="assemblies">程序集名称的集合</param> public static void Register(params string[] assemblies) { _otherAssembly = assemblies; } /// <summary> /// 注册类型 /// </summary> /// <param name="types"></param> public static void Register(params Type[] types) { _types.AddRange(types.ToList()); } /// <summary> /// 注册程序集。 /// </summary> /// <param name="implementationAssemblyName"></param> /// <param name="interfaceAssemblyName"></param> public static void Register(string implementationAssemblyName, string interfaceAssemblyName) { var implementationAssembly = Assembly.Load(implementationAssemblyName); var interfaceAssembly = Assembly.Load(interfaceAssemblyName); var implementationTypes = implementationAssembly.DefinedTypes.Where(t => t.IsClass && !t.IsAbstract && !t.IsGenericType && !t.IsNested); foreach (var type in implementationTypes) { var interfaceTypeName = interfaceAssemblyName + ".I" + type.Name; var interfaceType = interfaceAssembly.GetType(interfaceTypeName); if (interfaceType.IsAssignableFrom(type)) { _dicTypes.Add(interfaceType, type); } } } /// <summary> /// 注册dal、controller /// </summary> /// <param name="ass"></param> public static void Register(Assembly ass){ _assName = ass; } /// <summary> /// 注册 /// </summary> /// <typeparam name="TInterface"></typeparam> /// <typeparam name="TImplementation"></typeparam> public static void Register<TInterface, TImplementation>() where TImplementation : TInterface { _dicTypes.Add(typeof(TInterface), typeof(TImplementation)); } /// <summary> /// 注册一个实体 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="instance"></param> public static void Register<T>(T instance) where T:class { _builder.RegisterInstance(instance).SingleInstance(); } /// <summary> /// 构建IOC容器，需在各种Register后调用。 /// </summary> public static IServiceProvider Build(IServiceCollection services) { if (_otherAssembly != null) { foreach (var item in _otherAssembly) { _builder.RegisterAssemblyTypes(Assembly.Load(item)); } } if (_types != null) { foreach (var type in _types) { _builder.RegisterType(type).InstancePerLifetimeScope(); } } if (_dicTypes != null) { foreach (var dicType in _dicTypes) { _builder.RegisterType(dicType.Value).As(dicType.Key); } } _builder.Populate(services); //you can override the controller registration after populating services. if(_assName!=null){ _builder.RegisterAssemblyTypes(_assName).Where(t => t.Name.ToLower().EndsWith("dal")).PropertiesAutowired().InstancePerLifetimeScope(); _builder.RegisterAssemblyTypes(_assName).Where(t => t.Name.ToLower().EndsWith("controller")).PropertiesAutowired().InstancePerLifetimeScope(); } _container = _builder.Build(); return new AutofacServiceProvider(_container); } /// <summary> /// Resolve an instance of the default requested type from the container /// </summary> /// <typeparam name="T">类型</typeparam> /// <returns></returns> public static T Resolve<T>() { return _container.Resolve<T>(); } }