如何使用Ninject将参数传递到依赖关系链 [英] How to pass parameters down the dependency chain using Ninject

问题描述

我的类结构是：

public class PhotoService {

    private IRepository _repo;
    private DTConfig _config;

    public PhotoService(IRepository repo, DTConfig config)
    {    

        _repo = repo;
        _config = config;
    }
}

public class DTConfig
{
     private int _accountId;
     public DTConfig(int accountId)
     {
           _accountId = accountId;
     }
}

我的Ninject绑定如下：

My Ninject Bindings are like:

var kernel = new StandardKernel();
kernel.Bind<IPhotoService>().To<PhotoService>();
kernel.Bind<IRepository>().To<Repository>();
kernel.Bind<DTConfig>().ToSelf();

现在我想要的是传递 accountId 作为参数，同时创建 PhotoService 的实例

Now what I want, is to pass the accountId as a parameter while creating an instance of PhotoService

var photo = kernel.Get<IPhotoService>(); 

如何在创建PhotoService的实例时将参数传递给DTConfig。 accountId是从服务获取的，并且在编译时不可用。

How can I pass the parameter to DTConfig while creating an instance of PhotoService. The accountId is fetched from a service and is not available in compile time.

如果需要任何其他信息，请随意评论。

Feel free to comment if any other information is required.

推荐答案

Yannick的答案是好的，但是，这里有一个替代方法：创建 IAccountService 具有查找和返回AccountId的逻辑。然后将该服务注入到您的 IPhotoService 。

Yannick's answer is a good, however, here's an alternative: create an IAccountService that has the logic to find and return the AccountId. Then inject that service into your IPhotoService.

这篇关于如何使用Ninject将参数传递到依赖关系链的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！