问题描述

无法使用可用的服务和参数调用类型为‘LMS.Services.Security.EncryptionService’的带有‘Autofac.Core.Activators.Reflection.DefaultConstructorFinder’的构造函数： 无法解析构造函数"void.ctor(LMS.Models.SecuritySettings)"的参数""LMS.Models.SecuritySetting""

以下是代码文件

服务等级

public class EncryptionService : IEncryptionService
{
    private readonly SecuritySettings _securitySettings;
    public EncryptionService(SecuritySettings securitySettings)
    {
        this._securitySettings = securitySettings;
    }
}

引导程序

private static void SetAutofacContainer()
{
    var builder = new ContainerBuilder();
    builder.RegisterControllers(Assembly.GetExecutingAssembly());
    builder.RegisterType<UnitOfWork>().As<IUnitOfWork>().InstancePerRequest();
    builder.RegisterType<DatabaseFactory>().As<IDatabaseFactory>().InstancePerRequest();

    builder.RegisterAssemblyTypes(typeof(CourseRepository).Assembly)
           .Where(t => t.Name.EndsWith("Repository"))
           .AsImplementedInterfaces()
           .InstancePerRequest();

    builder.RegisterAssemblyTypes(typeof(CourseService).Assembly)
           .Where(t => t.Name.EndsWith("Service"))
           .AsImplementedInterfaces()
           .InstancePerRequest();

    builder.RegisterFilterProvider();
    var container = builder.Build();
    DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
}

早些时候它起作用了。但是当我引入EncryptionService实现时，我收到了上面的错误。 下面是另一个可用的代码实现，如下所示

public class CourseService : ICourseService
{
    #region Fields

    private readonly IRepository<Course> _courseRepository;
    private readonly IUnitOfWork _unitOfWork;

    #endregion

    #region ctor

    public CourseService(IRepository<Course> courseRepository, IUnitOfWork unitOfWork)
    {
        _courseRepository = courseRepository;
        _unitOfWork = unitOfWork;
    }
    #endregion
}

推荐答案

当Autofac尝试解析EncryptionService时，它尝试解析SecuritySettings服务，但Autofac不知道此类注册。

例如：

builder.RegisterType<SecuritySettings>()
       .As<SecuritySettings>(); 

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