無法使用Autofac注入對象

Question

我是IoC和Autofac的新手。 我創建了一個簡單的控制台項目來測試該技術。 當我運行該應用程序時，出現以下錯誤：所請求的服務'AutoFac.BLL.IEmployeeDetail'未注冊。 以下是我的代碼。 這行拋出錯誤：build.Register（y => new Employee（y.Resolve（）））;

public class Employee
{
    IEmployeeDetail _employeeDetail;

    public Employee(IEmployeeDetail employeeDetail)
    {
        _employeeDetail = employeeDetail;
    }

    public string GetName()
    {
        return _employeeDetail.Name();
    }
}

public class EmployeeDetail : IEmployeeDetail
{
    public string Name()
    {
        return "John Doe";
    }
}

public interface IEmployeeDetail
{
    string Name();
}

public class Program
{
    static void Main(string[] args)
    {
        var build = new ContainerBuilder();
        build.Register(y => new Employee(y.Resolve<IEmployeeDetail>()));
        var container = build.Build();
        Employee employee = container.Resolve<Employee>();

        Console.WriteLine(employee.GetName());
        Console.ReadLine();
    }
}

Answer 1

嘗試：

static void Main(string[] args)
{
    var build = new ContainerBuilder();
    build.Register<EmployeeDetail>().As<IEmployeeDetail>().InstancePerDepenency();
    build.Register<Employee>().AsSelf().InstancePerDependency();
    var container = build.Build();
    Employee employee = container.Resolve<Employee>();

    Console.WriteLine(employee.GetName());
    Console.ReadLine();
}

闡釋：

您不僅必須注冊屬於依賴關系的類型，還必須注冊使用這些依賴關系的類型。 基本上，您要解決的所有問題。