DataForm Lookup Fields

I'll add my vote to add some sample how to populate combobox at runtime with DevForce!
Thanks!

Thank you Sir!

It's coming. It's not a DevForce problem per se; more of a Silverlight WTF. But we'll be giving some guidance.

@antalakas - Agreed. It will be in the next release of ME and PE (PrismExplorer) ... which will coincide with our DevForce 5.2.2 release coming up next week.

I wired up a ComboBox in the DataGrid in MainFormIntermediate in the solution for the FourSimpleSteps tutorial. It's bound to an Order's Customer, and displays the complete list of Customers to choose from.

The ComboBox there is just an ordinary one, used inside a DataEditingTemplate within the DataGrid column, so I believe the wiring would be similar used in a DataForm, or stand-alone.

Originally posted by pholloway if you wanted to persist a changed Order record, is it a simple matter of calling Save against the entity manager -- in other words, is the FK relationship with Customer handled automagically, or do we need to do some extra stuff first?

That's all under your control. The safest -- and easiest -- thing to do is always to save all changes in your cache (orders, order line items, customers, products, everything) at the same time. That way, you don't accidentally save just part of a conceptual entity that spans more than one entity type (like an Order and its line items) and thus get data integrity issues.

On the other hand, there are use cases for saving only part of the cache, from a single entity on up, and you have the mechanisms to control exactly what gets submitted for a save. Under those circumstances, you have to take responsibility yourself to ensure that you don't create data integrity problems.