Bindinglist not updating listbox
Your View Model will fire the property changed when the collection itself changes – that is if you replace the property itself. You will very much think that as long as you bind the collection to the View Model’s property and the mode is set to Two Way – the source is updated automatically when items are edited in the Data Grid.Instead, this is meant to be a slightly more practical guide to squeezing performance out of WPF in ways that are probably more likely affecting you.and its subclasses List Box and List View exacerbate performance problems because these controls are highly dynamic (resolution happens “late”), involve WPF collections (which are slow), and have difficult and unpredictable lifetimes for their child controls.
You need to replace the entire “Expense” object for you to see the collection change firing up.
For example, if you have a Person View Model class with a property that you want to group by (let’s say Region), it is faster to create a mixed collection of My Group View Model and Person View Model objects, ordered correctly by group, with different Data Templates, than it is to bind to a grouped collection. And worse, once you start nesting Dynamic Resources (for example, a List View whose Style contains a Control Template that references objects through Dynamic Resources), you’re likely to run into situations where you leak controls.
This advice is practically impossible to follow, but do your best.
Not necessary the healthiest design, but the performance is quite a bit better.
Using implicit Control Template/Data Template styles will also help keep your code and XAML organized without the need for either . Behavior On Detaching signals the removal of a behavior from a control (generally never, as behaviors don’t get removed from controls).