Bug 48554 - Bound static property does not call setter in custom view
Summary: Bound static property does not call setter in custom view
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 2.3.3
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2016-12-01 16:38 UTC by Dale Cebula
Modified: 2016-12-16 11:42 UTC (History)
5 users (show)

Is this bug a regression?: ---
Last known good build:

Test project which recreates the static binding issue (224.46 KB, application/x-zip-compressed)
2016-12-01 16:38 UTC, Dale Cebula

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Description Dale Cebula 2016-12-01 16:38:22 UTC
Created attachment 18741 [details]
Test project which recreates the static binding issue

Tested on iOS and Android.

Custom control with the following property creates a System.NullReferenceException when bound to a static property in Xaml. The setter does not appear to be called.

        public static readonly BindableProperty ValuesProperty =
            BindableProperty.Create(nameof(Values), typeof(List<string>), typeof(MoonRangeSlider), null);

        public List<string> Values
            get { return (List<string>)GetValue(ValuesProperty); }
            set { SetValue(ValuesProperty, value); }

This Xaml causes a System.NullReferenceException. This works prior to

           Values="{x:Static moonviews:GradeView.All}"
           BackgroundColor="#FFe6e6e6" />

Rolling back to Version works as it always has on both iOS and Android.

Test project attached.
Comment 1 Stephane Delcroix 2016-12-01 21:00:59 UTC
Comment 2 Samantha Houts [MSFT] 2016-12-02 00:33:40 UTC
Should be fixed in 2.3.3-SR1. Thank you!
Comment 3 Parmendra Kumar 2016-12-16 11:42:50 UTC
I have checked this issue with Xamarin.Forms and observed that this issue has been fixed.

Hence closing this issue.