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I'm seeing some unexpected behavior in a Xamarin.Forms but only in Windows Store/ Universal apps. The app works as expected in iOS, Android, and Windows Phone.
The problem is the "Edit" button does not fire the 'EditCommand'. The work around is to get the EditCommand to fire is to insert a 'dummy' button. See the comment in <a href="https://bitbucket.org/awcoats/buttondemo/src/5b6f647d32c01314ea372821ea4231f6ffe30b44/Calicosol/Calicosol/ButtonDemoPage.xaml?at=master">ButtonDemoPage.xaml</a>.
The whole solution is in <a href="https://bitbucket.org/awcoats/buttondemo/src/5b6f647d32c0?at=master">BitBucket</a>.
I'm using Xamarin.Forms version 126.96.36.19974.
Created attachment 11947 [details]
We have updated the project and attempted this again with Xamarin.Forms version 188.8.131.5201-pre2 and the problem still exists.
Updated Repository: https://bitbucket.org/tvothcalico/buttonissuedemo/overview
See Branch feature-update-forms-version (https://bitbucket.org/tvothcalico/buttonissuedemo/src/dc1b9ca33dfce2e722208f15cc82155caa4f2347/?at=feature-update-forms-version) for the version that uses 184.108.40.20601-pre2.
I was able to reproduce this issue using the "developer" branch of the repo linked in comment 2.
Steps to reproduce are:
1. Launch the Windows Store app
2. Click the edit button.
Expected result: App will switch to an editing screen to edit the details.
Actual result: No response to clicking the edit button.
I noted that the Windows Store App project was referencing Forms version 1.4.4 but the other projects, including the PCL, were referencing Forms version 1.4.3. Updating all projects to 1.4.4 did not resolve the issue.
Tried updating to Forms version 220.127.116.1104-pre3 but also this did not resolve the issue.
However adding another button by uncommenting the "dummy" button on line 33 in ButtonDemoPage.xaml does resolve the issue and clicking the edit button works as expected.
I was not able to reproduce this issue using the updated Repo and the "feature-update-forms-version" branch. But looking again I see the workaround of adding an additional "dummy" button was applied. After commenting out line 33 in ButtonDemoPage.xaml I was able to reproduce the issue.
The "master" branch was totally different and did not have the same start up screen with the Edit button, so ignore the Master branch of that repo.
Microsoft Visual Studio Professional 2015
Version 14.0.23107.0 D14REL
Microsoft .NET Framework
Installed Version: Professional
Visual Basic 2015 00322-40000-00000-AA850
Microsoft Visual Basic 2015
Visual C# 2015 00322-40000-00000-AA850
Microsoft Visual C# 2015
Visual C++ 2015 00322-40000-00000-AA850
Microsoft Visual C++ 2015
Visual F# 2015 RC 00322-40000-00000-AA850
Microsoft Visual F# 2015 RC
Windows Phone SDK 8.0 - ENU 00322-40000-00000-AA850
Windows Phone SDK 8.0 - ENU
Application Insights Tools for Visual Studio Package 1.0
Application Insights Tools for Visual Studio
ASP.NET and Web Tools 14.0.20626.0
ASP.NET and Web Tools
ASP.NET Web Frameworks and Tools 2013 5.2.30624.0
For additional information, visit http://www.asp.net/
Common Azure Tools 1.5
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.
Generates unit test code for methods in classes under test.
A Visual Studio Extension that brings the GitHub Flow into Visual Studio.
Microsoft Azure Mobile Services Tools 1.4
Microsoft Azure Mobile Services Tools
NuGet Package Manager 3.0.0
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.
PreEmptive Analytics Visualizer 1.2
Microsoft Visual Studio extension to visualize aggregated summaries from the PreEmptive Analytics product.
SQL Server Data Tools 14.0.50616.0
Microsoft SQL Server Data Tools
Visual Studio Tools for Universal Windows Apps 14.0.23121.00 D14OOB
The Visual Studio Tools for Universal Windows apps allow you to build a single universal app experience that can reach every device running Windows 10: phone, tablet, PC, and more. It includes the Microsoft Windows 10 Software Development Kit.
Xamarin 18.104.22.1681 (a1dc0d5)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.
Xamarin.Android 22.214.171.1243 (cfa43bb)
Visual Studio plugin to enable development for Xamarin.Android.
Xamarin.iOS 126.96.36.199 (2c6a530)
Visual Studio extension to enable development for Xamarin.iOS.
Thank you for taking the time to submit this report. After reviewing the description of this bug, we believe it no longer affects the current version of Xamarin.Forms. If you are still experiencing the issue after updating your packages, please reopen this report with an attached reproduction.
For your convenience, we have created some reproduction best practices viewable here: https://gist.github.com/jassmith/92405c300e54a01dcc6d
Xamarin Forms Team