Access to the value of a Custom Attribute

Question

I've got this custom attribute:

[AttributeUsage(AttributeTargets.Method, AllowMultiple=false, Inherited = true)] class MethodTestingAttibute : Attribute {        public string Value{ get; private set; }     public MethodTestingAttibute (string value)     {         this.Value= value;      } } 

To be used like this:

[MethodTestingAttibute("2")] public int m1() {return 3; } 

And my difficulty is to take the value of "2" of MethodTestingAttibute

object result = method.Invoke(obj, new Type[] {}); // here i get the return 

Now I want to compare this result to the value of MethodTestingAttibute. How can I do that? I'm trying to go up to this road but without success:

method.GetCustomAttributes(typeof(MethodTestAttibute), true)[0]... 

What is the proper way to get access to the field of the custom attribute?

Answer 1

var attribute =    (MethodTestingAttibute)    typeof (Vehicles)       .GetMethod("m1")       .GetCustomAttributes(typeof (MethodTestingAttibute), false).First(); Console.WriteLine(attribute.Value); 

Answer 2

With my custom attribute:

[AttributeUsage(AttributeTargets.Method)] public class AttributeCustom : Attribute {     public string MyPropertyAttribute { get; private set; }      public AttributeCustom(string myproperty)     {         this.MyPropertyAttribute = myproperty;     } } 

I create a method for to get attribute with his values:

public static AttributeCustom GetAttributeCustom<T>(string method) where T : class {     try     {         return ((AttributeCustom)typeof(T).GetMethod(method).GetCustomAttributes(typeof(AttributeCustom), false).FirstOrDefault());     }     catch(SystemException)     {         return null;     } } 

With a example class (must be not static because T is generic)

public class MyClass {     [AttributeCustom("value test attribute")])     public void MyMethod()      {         //...     } } 

Usage:

var customAttribute = GetAttributeCustom<MyClass>("MyMethod"); if (customAttribute != null) {     Console.WriteLine(customAttribute.MyPropertyAttribute); }