Aspect Injector 文档——混入效果

Mixins is a powerfull feature that enables developers to add new logic/properties to an object by automatically implementing interfaces. Aspect containing a mixin will create members in target similar to interface's and proxy them back to the aspect.

Mixins 是一个功能强大的特性，它允许开发人员通过自动实现接口向对象添加新的逻辑/属性。包含 Mixin 的Aspect将在目标中创建接口中定义的成员，并将它们代理回aspect。

Consider scnerio where you want to add a property to a target:

思考一下向目标添加属性的场景：

public class Target
{
  public void Do() {}
}

For this you need to create an interface that describes features you want to add:

为此，您需要创建一个声明您想要添加的元素的接口:

public interface IHaveProperty
{
  string Data { get; set; }
}

then we will create an aspect:

然后我们将创建一个aspect：

[Aspect(Scope.Global)]
[Injection(typeof(MyAspect))]
[Mixin(typeof(IHaveProperty))]
public class MyAspect: Attribute, IHaveProperty
{
  public string Data { get; set; }
}

And finally if apply this new aspect-attribute to Target will make look like (after compilation):

最终，如果将这个新的[MyAspect]特性应用到 Target类，那么在编译之后，Target类看起来应该是这样的：

[MyAspect]
public class Target : IHaveProperty
{
  string IHaveProperty.Data
  {
    get
    {
      return ((IHaveProperty)My1Aspect.__a$_instance).Data;
    }
    set
    {
      ((IHaveProperty)My1Aspect.__a$_instance).Data = value;
    }
  }

  public void Do()
  {
  }
}

Note that it isn't necessary to apply aspect to Target class itself, it is enough to apply it any member, like this:

注意，没有必要将[MyAspect]特性应用到 Target 类本身，只要将其应用到Target类的任意一个成员就足够了，如下所示:

public class Target
{
  [MyAspect]
  public void Do() {}
}