【BlogBook书】3、Autofac：依赖注入

整个框架已经做到了基于类库dll程序集级别的服务自动注册。

不需要自己单独做处理，只要在对应的分层中，写入.cs文件即可使用对应的服务。

一、相关的依赖注入配置

builder.Host    .UseServiceProviderFactory(new AutofacServiceProviderFactory())    .ConfigureContainer<ContainerBuilder>(builder =>    {        builder.RegisterModule(new AutofacModuleRegister());        builder.RegisterModule<AutofacPropertityModuleReg>();    })

程序集dll批量注册

var servicesDllFile = Path.Combine(basePath, "Blog.Core.Services.dll"); var repositoryDllFile = Path.Combine(basePath, "Blog.Core.Repository.dll");  builder.RegisterGeneric(typeof(BaseRepository<>)).As(typeof(IBaseRepository<>)).InstancePerDependency();//注册仓储 builder.RegisterGeneric(typeof(BaseServices<>)).As(typeof(IBaseServices<>)).InstancePerDependency();//注册服务
 // 获取 Service.dll 程序集服务，并注册 var assemblysServices = Assembly.LoadFrom(servicesDllFile); builder.RegisterAssemblyTypes(assemblysServices)     .AsImplementedInterfaces()     .InstancePerDependency()     .PropertiesAutowired()     .EnableInterfaceInterceptors()       //引用Autofac.Extras.DynamicProxy;     .InterceptedBy(cacheType.ToArray()); //允许将拦截器服务的列表分配给注册。// 获取 Repository.dll 程序集服务，并注册 var assemblysRepository = Assembly.LoadFrom(repositoryDllFile); builder.RegisterAssemblyTypes(assemblysRepository)     .AsImplementedInterfaces()     .PropertiesAutowired()     .InstancePerDependency();

二、各个分层相关代码规则

1、Repository仓储层

Repository仓储层已经被弱化，主要是有一个仓储基类和基类接口，不用再每一个仓储都写类文件了，通过泛型基类注入。

IBaseRepository<Guestbook> dal

2、在Service服务层

在Service服务层注入仓储Repository实例，服务层也同样统一了服务基类和基类接口，如果需要使用某个表数据，直接新建该表的服务类

public class DepartmentServices : BaseServices<Department>, IDepartmentServices{
}

当然，如果这个服务中，需要用其他的仓储，可以直接注册

public class GuestbookServices : BaseServices<Guestbook>, IGuestbookServices  {      private readonly IUnitOfWorkManage _unitOfWorkManage;      private readonly IBaseRepository<PasswordLib> _passwordLibRepository;
      private readonly IPasswordLibServices _passwordLibServices;
      public GuestbookServices(IUnitOfWorkManage unitOfWorkManage, IBaseRepository<Guestbook> dal, IBaseRepository<PasswordLib> passwordLibRepository, IPasswordLibServices passwordLibServices)      {          _unitOfWorkManage = unitOfWorkManage;          _passwordLibRepository = passwordLibRepository;          _passwordLibServices = passwordLibServices;  }

3、在Controller控制层注入服务Service实例

public class ModuleController : BaseApiController{    readonly IModuleServices _moduleServices;    readonly IUser _user;

    public ModuleController(IModuleServices moduleServices, IUser user)    {        _moduleServices = moduleServices;        _user = user;    }}

三、Controller层同时支持属性注入

类似与Springboot的属性注入，BlogCore也同样支持

1、相关配置

public class AutofacPropertityModuleReg : Autofac.Module {     protected override void Load(ContainerBuilder builder)     {         var controllerBaseType = typeof(ControllerBase);         builder.RegisterAssemblyTypes(typeof(Program).Assembly)             .Where(t => controllerBaseType.IsAssignableFrom(t) && t != controllerBaseType)             .PropertiesAutowired();
     } }

2、直接使用

public class BlogController : BaseApiController {     // 属性注入     public IBlogArticleServices _blogArticleServices { get; set; }          private readonly ILogger<BlogController> _logger;
     /// <summary>     /// 构造函数服务注入          /// </summary>     /// <param name="logger"></param>     ///      public BlogController(ILogger<BlogController> logger)     {         _logger = logger;     } }