C# 属性可以访问目标类吗? [英] Can C# Attributes access the Target Class?

问题描述

我想通过使用反射从属性类访问类的属性.可能吗?

I want to access the properties of a class from the attribute class by using reflection. Is it possible?

例如:

class MyAttribute : Attribute
{
    private void AccessTargetClass()
    {
        // Do some operations
    }
}

[MyAttribute]
class TargetClass
{
}

推荐答案

不是直接的，但是为了让属性做任何事情，你必须已经拥有类型/成员的句柄并调用它的 GetCustomAttributescode> 方法，所以你可以简单地从那里传入它:

Not directly, but in order for the attribute to do anything, you already must have a handle to the type/member and call its GetCustomAttributes method, so you can simply pass it in from there:

class MyAttribute : Attribute
{
    public void DoSomethingWithDeclaringType(Type t)
    {
    }
}

像这样使用它:

Type classType = typeof(MyClass);
object[] attribs = classType.GetCustomAttributes(typeof(MyAttribute), true);
if(attribs.Length > 0)
{
    ((MyAttribute)attribs[0]).DoSomethingWithDeclaringType(classType);
}

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