Question

I have a marker interface something like this:

[AttributeUsage(AttributeTargets.Method, AllowMultiple=false, Inherited=true)]
public class MyAttribute : Attribute
{
}

And i want to apply it to methods on different classes in different assemblies…

Then I want to Get a MethodInfo for all methods that have this attribute applied. I need to search the whole AppDomain and get a reference to all these methods.

I know we can get all types and then get all methods, but is there a quicker/better way to do this? … or is this the quickest manner to get the information I need?

(I’m using ASP.NET MVC 1.0, C#, ./NET 3.5)

Thanks heaps!

Answer 1

Ultimately, no – you have to scan them. LINQ makes it fairly pain-free though.

        var qry = from asm in AppDomain.CurrentDomain.GetAssemblies()
                  from type in asm.GetTypes()
                  from method in type.GetMethods()
                  where Attribute.IsDefined(method, typeof(MyAttribute))
                  select method;

Note this only scans loaded assemblies “as is”.