Question

My problem is like this:

In ASP DetailsView component we have three different EventArgs for different DB operations:
DetailsViewInsertedEventArgs, DetailsViewDeletedEventArgs, DetailsViewUpdatedEventArgs.

All above EventArgs have common properites, I am interested in two of them: Exception and ExceptionHandled. Unfortunately those two properties are not existant in the common ancestor for those event args.

I would like to create a method like this:

public void DoSomething(ref CommonAncestorForDVArgs args)
{

    if (args.Exception != null)
    {
        //do something with an exception
        args.ExceptionHandled = true;
    }
}

Of course this is not possible due to the fact that I’ve described earlier.
Solution which I came up with is this:

public void DoSomething(Exception e, bool ExceptionHandled)
{

    if (e.Exception != null)
    {
        //do something with an exception
        ExceptionHandled = true;
    }
}

But I am wonder if there is something better?

Answer 1

Alternatively, use Reflection:

public void DoSomething (ref CommonAncestorForDVArgs args)
{
  if (args.GetType () == typeof DetailsViewInsertedEventArgs || // syntax probably wrong here
      args.GetType () == some.other.type)
  {
    // do something with an exception
  }
}

In terms of maintenance, it’s probably not that much different from my other answer.