将 Class 的实例作为参数传递给 Attribute 构造函数 [英] Pass instance of Class as parameter to Attribute constructor

问题描述

我需要自定义属性中的类/模型实例(用于访问非静态成员).

I need an instance of class/model(for the purpose of accessing a non-static member) within my custom attribute.

public class LoginModel
{
     [AutoComplete(currentInstance)]  //pass instance of class or CompanyNames
     public string DepartmentName { get; set; }


     public string[] DepartmentNames { get {...} }
}

有没有办法在不使用 new() 或反射的情况下做到这一点.

Is there a way to do this without using new() or Reflection.

推荐答案

这完全不可能.属性在编译时被烘焙到程序集的元数据中，因此谈论将类的实例传递给属性没有任何意义，因为实例仅在运行时存在.

That's totally impossible. Attributes are baked into the metadata of the assembly at compile-time so talking about passing an instance of a class to an attribute doesn't make any sense because instances exist only at runtime.

另一方面，属性总是被反射消耗掉，所以我猜现在您正在检查类元数据上是否存在此自定义属性，您可以使用该实例.

On the other hand attributes are always consumed by reflection, so I guess that at the moment you are checking for the presence of this custom attribute on the class metadata you could use the the instance.

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