ILogger<T> 的基类类型使用依赖注入 [英] Base Class type for ILogger<T> using Dependency Injection

问题描述

我有一个基类可以做一些工作，包括日志记录.我有一个 ILogger 依赖注入到构造函数中

I have a base class that does some work, including logging. I have an ILogger dependency injected into the constructor

public abstract class BaseClassExample
{
    protected readonly ILogger<BaseClassExample> logger;

    public class BaseClassExample(ILogger<BaseClassExample> logger)
    {
        this.logger = logger;
    }
}

而且我想让类实现 BaseClassExample，并且也做自己的工作，包括日志记录.

And I want to have classes implement BaseClassExample, and do their own work too, also including logging.

public class DerivedClass : BaseClassExample
{
    protected readonly ILogger<DerivedClass> logger;

    public class BaseClassExample(ILogger<DerivedClass> logger)
    {
        this.logger = logger;
    }
}

这是正确的做事方式吗?我应该获取实现类的类型来记录基类吗?我应该有一个单独的记录器实例(使用 DerivedClass 的类型)还是尝试使用与基类相同的实例?

Is this the right way of doing things? Am I supposed to get the implementing class's type for logging for the base class? Should I have a separate instance of a logger (with the DerivedClass's type) or try and use the same one as the base class?

推荐答案

在基类中使用非泛型 ILogger，但在派生类中使用 ILogger.通过这种方式，您可以根据需要简单地将 ILogger 传递给您的基类:

use a none generic ILogger in your base class, but ILogger<DerivedClass> in your derived class. This way you can simply pass the ILogger to your base class if needed:

public abstract class BaseClassExample
{
    private readonly ILogger logger;

    public class BaseClassExample(ILogger logger)
    {
        this.logger = logger;
    }
}

和

public class DerivedClass : BaseClassExample
{
    private readonly ILogger<DerivedClass> logger;

    public class BaseClassExample(ILogger<DerivedClass> logger)
                  :base(logger)
    {
        this.logger = logger;
    }
}

如果你以某种方式最终得到两个派生类，你不仅可以更轻松地使用它，还可以在它们两个中使用 ILogger.

this way not only you can use it easier if you somehow end up with two derived class you can use ILogger in both of them.

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