Hi Terry - I'm writing from IdeaBlade
DevForce. I confess to ignorance of the details of the Telerik grid. The guidance given here would seem to provide you with some direction.
We cannot become experts in every vendor's controls. But we are eager to ensure the best possible experience when Telerik and DevForce come together.
Nedyalko wrote: "In order to validate the UI layer you have to handle RadGridView.RowValidating event. If not so probably some binding error (exception) is raised when BO is about to be committed."
As I read this, you may be responsible for doing something in the UI beyond merely binding to your DevForce entity. If you discover that we are throwing an exception in the binding ... then something is amiss either with us or with the way you wrote a custom validator (e.g., your custom validator itself is throwing an exception).
If Nedyalko's advice works out, please let us know so we can share your findings with others. If it does not because we're doing something wrong ... or if you think we should be doing something else to improve the experience, please let us know as well.
Either way, you can initiate action with a post to our forum: http://www.ideablade.com/forum/default.asp
Everyone benefits when we're all on the same page.