netcore2自动添加依赖的方法

Question

我有多对接口并像那样实现ICategoryService -> CategoryServiceICategoryTypeService -> CategoryTypeServiceIOrderService -> OrderServiceILoggingService -> LoggingService所有的类和接口都在Data.dll里面，我像这样循环它。foreach (var type in serviceAssembly.GetTypes()){    if (type.Name.Contains("Repository") && !type.IsInterface && !type.IsGenericType)    {        Type interfaceImplement = type.GetInterfaces().SingleOrDefault(t => t.IsGenericType == false);        if (interfaceImplement != null)        {            System.Diagnostics.Debug.WriteLine($"{type.Name} is inherited by {interfaceImplement.Name}");            services.AddTransient(interfaceImplement, type);        }    }}我得到这个错误InvalidOperationException：尝试激活“VietWebSite.Web.Areas.WebApi.Administrator.ValuesController”时无法解析类型“VietWebSite.Service.ILoggingService”的服务。但如果我将代码更改为这样，它就会起作用：services.AddTransient<ILoggingService, LoggingService>();services.AddTransient<ICategoryService, CategoryService>();services.AddTransient<ICategoryTypeService, CategoryTypeService>();services.AddTransient<IOrderService, OrderService>();请帮忙。

Answer 1

这是一个工作演示：

Data使用类和接口 创建库：

public interface ICategoryService

{

    string Output();

}

public class CategoryService : ICategoryService

{

    public string Output()

    {

        return "CategoryService.Output";

    }

}

public interface ILoggingService

{

    string Output();

}

public class LoggingService : ILoggingService

{

    public string Output()

    {

        return "LoggingService.Output";

    }

}

将Data库引用添加到 asp.net core 项目

配置Startup.cs喜欢

var serviceAssembly = Assembly.GetAssembly(typeof(CategoryService));

foreach (var type in serviceAssembly.GetTypes())

{

    if (type.Name.Contains("Service") && !type.IsInterface && !type.IsGenericType)

    {

        Type interfaceImplement = type.GetInterfaces().SingleOrDefault(t => t.IsGenericType == false);

        if (interfaceImplement != null)

        {

            System.Diagnostics.Debug.WriteLine($"{type.Name} is inherited by {interfaceImplement.Name}");

            services.AddTransient(interfaceImplement, type);

        }

    }

}

用例：

public class HomeController : Controller

{

    private readonly ILoggingService _loggingService;

    public HomeController(ILoggingService loggingService)

    {

        _loggingService = loggingService;

    }

    public IActionResult Index()

    {

        var result = _loggingService.Output();

        return View();

    }        

}

更新：

您的问题是由AppDomain.CurrentDomain.GetAssemblies()只会返回加载的程序集引起的，请尝试以下代码：

//Load Assemblies

//Get All assemblies.

var refAssembyNames = Assembly.GetExecutingAssembly()

    .GetReferencedAssemblies();

//Load referenced assemblies

foreach (var asslembyNames in refAssembyNames)

{

    Assembly.Load(asslembyNames);

}

Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();

var myAssemblies = assemblies.Where(assem => assem.GetName().Name.Contains("VietWebSite.Data") || assem.GetName().Name.Equals("VietWebSite.Service"));