Binding ListBox selectedItems to a collection in the viewModel

[brignolff]

Hi,

I'm trying to bind a list box selected items to a collection in my ViewModel and then validate the collection using a ValidationRule.
The ValidationRule only verify if the count property of the collection is higher than 0.

The collection is getting filled but the Validation rule doesn't re-evaluate.

Tried with sourceList/Caches and Observable collection.

Can someone help me ?

[mStylias]

Hey @brignolff ,
This video explains Validation in ReactiveUI pretty well. Maybe it will help you.

[brignolff]

Thank you for your answer, I finally created an observable of IChangeSet using the connect method of the sourcelist. I then used it to trigger the validation rule.