Question

I’m logging all errors occuring in my OnException method.

How to find in which controller/action an error occurred?

Answer 1

Check the exception’s call stack.

For example:

var actionMethod = new StackTrace(exception)
    .GetFrames().FirstOrDefault(f => 
        typeof(IController).IsAssignableFrom(f.GetMethod().DeclaringType)
    ).GetMethod();