[IronPython] WPF / ipy: renewing data binding? Could use some guidance.

Ken MacDonald drken567 at gmail.com
Wed Aug 18 18:16:16 CEST 2010

Yep. seems to have no effect.

On Wed, Aug 18, 2010 at 12:15 PM, Lukas Cenovsky <cenovsky at bakalari.cz>wrote:

>  Have you tried manually refreshing the CollectionView after update by
> CollectionView.Refresh()?
> --
> -- Lukáš
> On 18.8.2010 17:35, Ken MacDonald wrote:
> I have inherited a WPF/ipy app which is using data binding / CollectionView
> to interact with a customer list. Steps are roughly:
> 1. query cust. list from DB, sorted by name
> 2. bind this to a CollectionView
> 3. step through the list, displaying 1 cust. at a time using the
> CollectionView.Next/Previous (forget the exact name) operators,
>     moved thru the list in alpha-sorted order
> 4. re-sort the list by, say, customer type. Still moves thru the list with
> Next/Previous except now sorted by type, no longer by alpha.
>     Perfect so far, but............
> 5. New customers (maybe) have been added to the DB. I re-query the customer
> list to pick up any new ones. The new list is sorted by  customer type
> (remembered my last sort criteria).
> 6. bind this to a CollectionView.
> 7. step thru the list, using Next/Previous on the CollectionView. The
> customers appear in *utterly random order*, not by alpha, not by customer
> type.
> So, I'm a bit stymied. I've been looking through the MSDN but haven't seen
> anything that addresses how to update CollectionView/data binding to reflect
> new data in the customer list, or whether it is, in fact, possible to do so.
> I've found a couple of hints, and tried dozens of variations on the code
> that seems like it should "just work". It's quite tempting to just maintain
> my own lists and navigation in python.
> I've deliberately NOT included any code; for one thing, it's scattered over
> a number of modules of python (and XAML) but am interested in how any of you
> would approach the re-binding-to-new-data problem; also, if any of you tried
> it and found it equally as bizarre and arcane and impossible as it seems to
> be for my app.
> Thanks!
> Ken
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