将访问属性属性作为实例属性-可以吗？

Question

For example, I have a class with a property and attributes:

[MyDisplay(Name = "Class name", Description = "Class description.")]
public class MyClass
{
    [MyDisplay(Name = "Property name", Description = "Property description.")]
    public int MyProperty { get; set; }
}

I want to get the attribute values like

// Get type attribute...
string className = MyClass.Attributes.MyDisplay.Name;

// Get member attribute...
string propertyDescription =
    MyClass.Properties.MyProperty.Attributes.MyDisplay.Description;

How to get it? I want the code that automatically fill the additional fields of MyClass with attribute data. It seems to be very convenient to access to the attribute values like to the instance values - for bindings, etc.

The main complexity is to fill MyClass.Attributes and MyClass.Properties collections with objects with names the same as properties and attributes names. And so I think this collections must be static. And each object inside MyClass.Properties collection also must has Attributes collection (for example, MyProperty.Attributes) like MyClass.Attributes collection.

Answer 1

I'm not sure what you are trying to achieve, but below code will make you an idea how to extract attribute data from your assembly at run-time. Please note that attribute data is per type declaration, not per instance of type.

    foreach (var type in System.Reflection.Assembly.GetExecutingAssembly().GetTypes())
    {
        // class attributes
        foreach (var typeAttr in type.GetCustomAttributes(typeof(DisplayAttribute), false))
        {
            Console.WriteLine(((DisplayAttribute)typeAttr).Name);
            Console.WriteLine(((DisplayAttribute)typeAttr).Description);
        }

        // members attributes
        foreach (var props in type.GetProperties())
        {
            foreach (var propsAttr in props.GetCustomAttributes(typeof(DisplayAttribute), false))
            {
                Console.WriteLine(((DisplayAttribute)propsAttr).Name);
                Console.WriteLine(((DisplayAttribute)propsAttr).Description);
            }
        }
    }