C# Ninject'；s AllowNullInjection在ASP.NET WCF中不工作

我正在ASP.NET WCF项目中使用以下Ninject的NuGet软件包：

• 尼尼特
• Ninject.Web.Common
• Ninject.Web.Common.WebHost
• Ninject.Extensions.Wcf

我的WCF服务

FooService

依赖于

IRepository

，它有一个具体的实现

foosrepository

，如下所示：

[ServiceContract]
public interface IFooService
{
    [OperationContract]
    IEnumerable<Foo> GetFoos();
}

public class FooService : IFooService
{
    private readonly IRepository _repository;

    public FooService(IRepository repository)
    {
        _repository = repository;
    }
}

public class FooRepository : IRepository
{
    private readonly FooContext _fooContext;
    private readonly ILogger _logger;

    public FooRepository(FooContext fooContext, ILogger logger)
    {
        _fooContext = fooContext;
        _logger = logger;
    }
}

private static void RegisterServices(IKernel kernel)
{
    kernel.Settings.AllowNullInjection = true;
    kernel.Bind<IRepository>().To<FooRepository>().InRequestScope();

    // I want to bind null to ILogger through the Settings property
    // instead of manually calling Bind<ILogger>().ToConstant<ILogger>(null)
}       

我在

NinjectWebCommon.cs

中设置依赖项，如下所示：

[ServiceContract]
public interface IFooService
{
    [OperationContract]
    IEnumerable<Foo> GetFoos();
}

public class FooService : IFooService
{
    private readonly IRepository _repository;

    public FooService(IRepository repository)
    {
        _repository = repository;
    }
}

public class FooRepository : IRepository
{
    private readonly FooContext _fooContext;
    private readonly ILogger _logger;

    public FooRepository(FooContext fooContext, ILogger logger)
    {
        _fooContext = fooContext;
        _logger = logger;
    }
}

private static void RegisterServices(IKernel kernel)
{
    kernel.Settings.AllowNullInjection = true;
    kernel.Bind<IRepository>().To<FooRepository>().InRequestScope();

    // I want to bind null to ILogger through the Settings property
    // instead of manually calling Bind<ILogger>().ToConstant<ILogger>(null)
}       

在这种情况下，如何设置可选注入