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.net 8使用autofac以及.net core自带的注入

news 2026/5/12 19:21:28

.net 8配置Autofac

var builder = WebApplication.CreateBuilder(args);// Add services to the container.//autofac注册到builder
builder.Host.UseServiceProviderFactory(new AutofacServiceProviderFactory());//服务注册到autofac
builder.Host.ConfigureContainer<ContainerBuilder>(containerBuilder =>
{// 示例1：注册单个服务（作用域生命周期）containerBuilder.RegisterType<MyService>().As<IMyService>().InstancePerLifetimeScope();// 示例2（推荐）：批量注册程序集中所有服务containerBuilder.RegisterAssemblyTypes(typeof(Program).Assembly).Where(t => t.Name.EndsWith("Service")).AsImplementedInterfaces().InstancePerLifetimeScope();
});

2.手动批量注入

        public static void AddBusinessServicesForSQLSugar(this IServiceCollection services){var basePath = AppContext.BaseDirectory;var servicesDllFile = Path.Combine(basePath, "MedicTechService.dll");var sugarRepositoryDllFile = Path.Combine(basePath, "MedicTech.Repository.dll");// 加载程序集var serviceAssembly = Assembly.LoadFrom(servicesDllFile);var sugarRepositoryAssembly = Assembly.LoadFrom(sugarRepositoryDllFile);// 自动注册泛型 Repositoryvar baseRepositoryInterface = typeof(IBaseRepository<,>);var baseRepositoryImplementation = typeof(MedicTech.Repository.Base.BaseRepository<,>);// Fix for CS0119: Ensure the correct syntax is used for registering services in the IServiceCollection.services.AddScoped<IUnitOfWorkManage, UnitOfWorkManage>();services.AddScoped(baseRepositoryInterface, baseRepositoryImplementation);//  获取服务程序集中定义的所有接口var serviceInterfaceTypes = serviceAssembly.GetTypes().Where(t => t.IsInterface).ToDictionary(t => t.Name, t => t);var repositoryTypes = sugarRepositoryAssembly.GetTypes().Where(t => t.IsClass && !t.IsAbstract && t.Name.EndsWith("Repository") && !t.IsGenericType).ToList();foreach (var repoType in repositoryTypes){//var interfaceType = repoType.GetInterfaces()//    .FirstOrDefault(i => i.Name == $"I{repoType.Name}");var expectedInterfaceName = $"I{repoType.Name}";//if (interfaceType != null)//{//    services.AddSingleton(interfaceType, repoType);//}// 在服务程序集中查找匹配的接口if (serviceInterfaceTypes.TryGetValue(expectedInterfaceName, out var interfaceType)){// 确保实现类确实实现了该接口if (interfaceType.IsAssignableFrom(repoType)){services.AddScoped(interfaceType, repoType);}else{// 处理不匹配的情况（记录日志或抛出异常）throw new InvalidOperationException($"Repository {repoType.FullName} does not implement expected interface {interfaceType.FullName}");}}else{// 处理接口未找到的情况throw new TypeLoadException($"Could not find interface {expectedInterfaceName} in assembly {serviceAssembly.FullName}");}}var serviceTypes = serviceAssembly.GetTypes().Where(t => t.IsClass && !t.IsAbstract && t.Name.EndsWith("Services")).ToList();foreach (var serviceType in serviceTypes){var interfaceType = serviceType.GetInterfaces().FirstOrDefault(i => i.Name == $"I{serviceType.Name}");if (interfaceType != null){services.AddScoped(interfaceType, serviceType);}}}

3.使用Autofac批量注册

//MedicTechRep类库和MedicTechServer的API
//Program.cs
builder.Host.ConfigureContainer<ContainerBuilder>(containerBuilder =>
{
var assemblysServices = Assembly.Load("MedicTechRep");containerBuilder.RegisterAssemblyTypes(assemblysServices).AsImplementedInterfaces()// 将类型注册为它实现的所有接口。.InstancePerLifetimeScope()//.InstancePerLifetimeScope().EnableInterfaceInterceptors();//启用接口拦截器，用于 AOP（面向切面编程）
    //注册第二个类库（这个类库不适用接口，直接用服务类   AsImplementedInterfaces  EnableInterfaceInterceptors）

　　var path2 = Path.Combine(basePath, "MedicTechRep2.dll");或者使用路径来注册
　　var assemblysServices_2 = Assembly.LoadFrom(path2);

　　containerBuilder.RegisterAssemblyTypes(assemblysServices)

});

//控制类(注意使用注册的服务必须使用接口，直接使用类报错)
private readonly IClass1 _class1;
public LoginRegisterController(IClass1 class1)
:base() 
{_class1 = class1;
}[HttpGet("logintest")]
public async Task<ResponseBase> Getlogintest()
{ResponseBase res = new ResponseBase();res.Data = _class1.InputString();return res;
}