PickerUpdateSample

Sample Xamarin.Forms project illustrating an issue with Picker binding

Description

When using a Picker control with its ItemsSource bound to an ObservableCollection, the Picker only responds to additions and deletions in the collection, not to updates in the collection's members.

Steps to Reproduce

1. Create a Picker control bound to an ObservableCollection
2. Mutate the displayed property (that is, the property denoted by the Picker's ItemDisplayBinding of one member of the collection

Expected Behavior

The new value should appear in the Picker.

Actual Behavior

No changes is shown in the Picker.

Basic Information

• Version with issue: 3.1.0.697729
• Last known good version: none
• IDE: Visual Studio 2017
• Platform Target Frameworks:
  • Android: 8.1 - API 27
• Nuget Packages: Refactored.MvvmHelpers (although the problem presents without this package as well)