Notice (2018-05-24): bugzilla.xamarin.com is now in
Please join us on
Visual Studio Developer Community and in the
Mono organizations on
GitHub to continue tracking issues. Bugzilla will remain
available for reference in read-only mode. We will continue to work
on open Bugzilla bugs, copy them to the new locations
as needed for follow-up, and add the new items under Related
Our sincere thanks to everyone who has contributed on this bug
tracker over the years. Thanks also for your understanding as we
make these adjustments and improvements for the future.
Please create a new report on
Developer Community or GitHub with
your current version information, steps to reproduce, and relevant error
messages or log files if you are hitting an issue that looks similar to
this resolved bug and you do not yet see a matching new report.
Created attachment 20271 [details]
Small reproduction of the bug.
In TableViews in UWP, Viewcells don't use the CanExecute event. I have a bigger project which invokes the event in a TextCell and ImageCell, but I've created a small reproduction to show the bug (no event invoked, just a hard-coded function that returns false). I have confirmed that the bug does not exist in Android and iOS, at least on my bigger project and in the reproduction. Tested in both Forms 126.96.36.199 and 188.8.131.52-pre4
I will admit to not testing this with any other controls that have a Command Binding such as buttons, or ViewCells in a ListView, and I have not tested earlier releases of Xamarin Forms. I have also not looked into a work-a-round using a custom renderer. If I get some time to work on this though, I will update this thread.
Hopefully my attachment works, it's my first time submitting a bug report.
Thanks for the reproduction; there is a noted difference in behavior between UWP and the other platforms, and I also checked against the latest nightly build to be sure.
Should be fixed on 2.3.5-pre1
Verified on xamarin.form version 184.108.40.2066-pre6
ScreenCast Link: https://www.screencast.com/t/g59IwTCn