.net binding framework or csla problem? or mine :)

I think you are missing a step on unbinding the data cleanly prior to calling save.  Look at the project tracker’s any form – you will code to unbind data before saving.  What you did I think was not work-around, but something that needs to be done.

Sergey Barskiy

Senior Consultant

office: 678.405.0687 | mobile: 404.388.1899

Microsoft Worldwide Partner of the Year | Custom Development Solutions, Technical Innovation

Hi,

I've got a simple hierarchy:
Customer
    Orders<Order>
           OrderItems<OrderItem>

Using CSLA 3.0.4

I've got 2 grids on the UI one with the Orders bound to customer.Orders and the other one with details bound to customer.Orders.OrderItems. Binding is done trhough 2 binding sources not directly.

Didn't need to do anything to syncronize the 2 grids which was nice.
The problem:
    When I bind the interface to data I also do customer.BeginEdit() like in the project tracker example. This works fine until after I accept the changes and try to rebind. Exception thrown is "edit level missmatch in CopyState". I debugged CSLA code and noted that when I call ApplyChanges or CancelChanges the OrderItem objects don't decrement their editlevel to 0. The orderitems grid is actually calling BeginEdit on the first element everytime I select a row in the Ord ersGrid.

The problem occurs only when you use a grand child colection bound like I explained above. In case of child colections there is no issue.

I worked around it by calling EndEdit() on the OrderItemsBindingSource.Current in OnSlectedRowChanged event of the OrdersGrid.

Am I doing it the wrong way or there is an issue with the databinding framework or csla?

Thanks,
Cosmin Onea

I was just trying to help, man.  Did you trace into UndindBindinSource to see what Current is pointing to and check edit level after Current.Apply/Cancel edit?

Sergey Barskiy

Senior Consultant

office: 678.405.0687 | mobile: 404.388.1899

Microsoft Worldwide Partner of the Year | Custom Development Solutions, Technical Innovation

Hi Sergey,

Belive me I did it the proper way. I unbound all the bindingsources, apply/cancel edit and then bind again. I copied and adapted the code from PT.

Private Sub RebindUI(ByVal saveObject As Boolean, ByVal rebind As Boolean)
.................................................................................................
UnbindBindingSource(OrderItemsBindingSource, saveObject, False) 'Here it doesnt decrement the edit level of the first order item in the list. In case I dont touch the ordersgrid it does decrement it.
UnbindBindingSource(OrdersBindingSource, saveObject, False)
UnbindBindingSource(CustomerBindingSource, saveObject, True)

OrdersBindingSource.DataSource = CustomerBindingSource
OrderItemsBindingSource.DataSource = OrdersBindingSource

Try
    ........................ Cancel/Apply Changes....................................................
Catch
Finally
    CustomerBindingSource.ResetBindings(False)
    OrdersBindingSource.ResetBindings(False)
    OrderItemsBindingSource.ResetBindings(False)
End Try


I just noticed, if I don't touch the OrdersGrid and save the customer everything works fine. If I select any row it throws an exception after save when I do BeginEdit() again in BindUI() Method.

Could you please try it first before replying anything. I exhausted all my possibilities and left with the work around above.

Cosmin.