EditLevel Mismatch with grandchild (winform)

g.beraudo@castsoftware.com posted on Thursday, September 26, 2013

Dear all,

I might get too far from what I used to do with winform binding.

I have a root object, with a child collection and grandchild collection, lets call it:

Invoice [contains editable fields & computed fields]

+ InvoiceItemCategoryCollection [bound to my grid]

++ InvoiceItemCategoryItem [contains computed fields only]

+++ InvoiceItemCollection

++++ InvoiceItemItem [really contains editable fields]

I'm binding the above graph, using 2 bindsources.

bsInvoice: for the root object (Invoice), used to bind textBoxes & co

bsItemCategories: used to bind a grid with 2 levels of bands [it is an Infragistics grid, but I do not think this has an impact there]

Before unbinding my controls, my objects graph looks like:

Invoice [2]

+ InvoiceItemCategoryCollection [1]

++ InvoiceItemCategoryItem [2]

+++ InvoiceItemCollection  [1]

++++ InvoiceItemItem  [2]   => Problem there, how do I apply / cancel edit at that leve?

++++ InvoiceItemItem  [1]

++ InvoiceItemCategoryItem [1]

+++ InvoiceItemCollection  [1]

++++ InvoiceItemItem  [1]

Do you have any best practice for unbinding the grand child?

I'm currently facing EditLevel mismatch exception since I do not know how to manage this use case properly.

I'm not currently using CslaContrib_BindingSourceExtensions, but I read the books and applied the same spirit kind of extension, without facing this use case until our current improvement.

Thanks for your help / feedback,

Regards,

Gilles