How do I Handle Business Logic Exceptions?

How du I access Session in the partiel method like  OnValidate? I want to set a field to a session-variable on every insert.

if (action == System.Data.Linq.ChangeAction.Insert)

{

  Id = Guid.NewGuid();

  AccountId = Session("AccontId"); // Current account

}

You would need to use HttpContext.Current.Session, but I think you'd be tying your model objects to the Session which could limit your design's usefulness in other projects.

You'd need to use HttpContext.Current.Session.

Hi Scott. How can I implement business logic in the Delete-Insert-Update/Object partial method in the DataContext partial class? Thanks in advance.

Thanks for all your work on these videos!

Scott first off thank you very much for the videos! I am starting to understand the power of Dynamic data.

One question that throws red alerts in my mind is using exceptions for validation. Is there way to tie in a more simple validation like in Rocky Lhotka CSLA framework of having a collection of validation errors instead of throwing a expensive (time and cpu) exception?

Thanks!

I created a partial class Product and implemented OnProductNameChanging just like Scott in the video. It fires 3 times with new value, old value and then again new value of the product? Therefore throwing ValidationException the second  time it fires with the value Chai instaed of ACME.

I got the same as above any solution/how to check which value we are using.

Thanks for the great tutorials.

Thanks! Jërëjëf!