查找类实例的属性的属性 [英] Finding the attributes on the properties of an instance of a class

问题描述

给定一个类的实例，我想在运行时设置属性的属性.

Given an instance of a class I want to set properties on attributes at runtime.

所以我尝试了这个，但据我所知，它找到的是类上的属性而不是实例，所以我对属性所做的任何更改都不起作用.

So I tried this, but as far as I can tell this finds the attributes on the class not the instance, so any changes I make to the attribute properties have no effect.

var properties = myObject.GetType().GetProperties();

foreach (object prop in properties)
{
   var attribute =prop.GetCustomAttributes(typeof(MyAttribute), true)[0];
   //attribute.MyProp do some stuff
}

如果我尝试使用如下所示的类型描述符，则无法获取属性上的属性.

If I try using type descriptor like below, there is no way of getting to the attributes on the properties.

var myObject= (MyClass) object;
PropertyDescriptorCollection props = TypeDescriptor.GetProperties(myObject);

//There is no props[0].GetCustomAttributes(

推荐答案

属性是应用于类型或类型成员的元数据，而不是实例.如果您将值应用于类的特定实例，是否应该考虑使用属性/字段?

Attributes are metadata you apply to a Type, or a Member of a Type, not an instance. If you are applying values to a specific instance of a class, shouldn't you consider using properties/fields?

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