Question

I’m programming in Unity, using an Action event to hold a bunch of other Action delegates, in order to hook non-Monobehaviour objects into the Update() system. I’d like to be able to print the names of the actions to the Debug console, but using something like:

Delegate[] actions = updateActions.GetInvocationList();
foreach ( Delegate del in actions ) {
    Debug.Log( del.ToString() );
}

… just returns “System.Action”. I’ve tried also (del as Action).ToString() with no luck.

Answer 1

You can use the Method property to get a MethodInfo which should have a useful name.

Delegate[] actions = updateActions.GetInvocationList();
foreach ( Delegate del in actions )
{
    Debug.Log( del.Method.ReflectedType.FullName + "." + del.Method.Name );
}

You can use del.Method.ToString() if you want the signature or del.Method.Name if you only want the name. del.Method.ReflectedType.FullName gives you the type name.

For lambdas/anonymous methods the name might not be too useful since they only have a compiler generated name. In the current implementation the name of a lambda is something like <Main>b__0 where Main is the name of the method that contains the lambda. Together with the type name this should give you a decent idea which lambda it is.