Bug 31837 - [Windows 8.1/Windows Phone 8.1] Two-way binding on switch does not work after app launch
Summary: [Windows 8.1/Windows Phone 8.1] Two-way binding on switch does not work after...
Status: RESOLVED DUPLICATE of bug 31964
Alias: None
Product: Forms
Classification: Xamarin
Component: Windows ()
Version: 1.4.3
Hardware: PC Windows
: Normal normal
Target Milestone: ---
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2015-07-10 15:37 UTC by Jon Goldberger [MSFT]
Modified: 2015-08-17 11:25 UTC (History)
4 users (show)

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


Attachments
Test Project (795.86 KB, application/zip)
2015-07-10 15:37 UTC, Jon Goldberger [MSFT]
Details


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Status:
RESOLVED DUPLICATE of bug 31964

Description Jon Goldberger [MSFT] 2015-07-10 15:37:16 UTC
Created attachment 11983 [details]
Test Project

## Description

In a Windows 8.1 app or Windows Phone 8.1 app project, two-way bindings for a switch do not work after app launch. When the app first starts, the setter for the bound property is called, but after the UI is displayed, clicking the switch does not fire the property setter. The code works as is on Android, iOS, and WinPhone Silverlight 8.0. 


## Steps to reproduce

1. Load the attached test project into Visual Studio

2. Set the Windows 8.1 or the Windows Phone 8.1 app project to be the startup project.

3. Deploy the app using Debug

4. Note that breakpoints for the setter for the boolean property bound to the switches are called while app is loading. Keep clicking "Continue" until the UI is displayed.

5. When the UI is displayed, click a switch.

Expected result: Property setter breakpoint will be hit.

Actual result: breakpoint is not hit.


## Notes

Tested with Xamarin Forms 1.4.3


## My environment

Microsoft Visual Studio Ultimate 2013
Version 12.0.31101.00 Update 4
Microsoft .NET Framework
Version 4.6.00057

Installed Version: Ultimate

Architecture and Modeling Tools   06181-004-0451031-02209
Microsoft Architecture and Modeling Tools
    
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LightSwitch for Visual Studio 2013   06181-004-0451031-02209
Microsoft LightSwitch for Visual Studio 2013

Team Explorer for Visual Studio 2013   06181-004-0451031-02209
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Visual Basic 2013   06181-004-0451031-02209
Microsoft Visual Basic 2013

Visual C# 2013   06181-004-0451031-02209
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Microsoft Visual C++ 2013

Visual F# 2013   06181-004-0451031-02209
Microsoft Visual F# 2013

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Windows Phone SDK 8.0 - ENU   06181-004-0451031-02209
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   12.4.60425.0
Microsoft Web Developer Tools contains the following components:
Support for creating and opening ASP.NET web projects
Browser Link: A communication channel between Visual Studio and browsers
Editor extensions for HTML, CSS, and JavaScript
Page Inspector: Inspection tool for ASP.NET web projects
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ASP.NET Web Frameworks and Tools 2012.2   4.1.21001.0
For additional information, visit http://go.microsoft.com/fwlink/?LinkID=309563

ASP.NET Web Frameworks and Tools 2013   5.2.21010.0
For additional information, visit http://www.asp.net/

Common Azure Tools   1.4
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

Microsoft Advertising SDK for Windows Phone   
Microsoft Advertising SDK for Windows Phone
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Microsoft Azure HDInsight HQL Service   2.0.1000.0
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Microsoft Azure HDInsight Tools for Visual Studio   2.0.1000.0
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Microsoft Azure Mobile Services Tools   1.3
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Microsoft Azure Tools   2.6
Microsoft Azure Tools for Microsoft Visual Studio 2013 - v2.6.30508.1601

Microsoft Azure Tools   2.4
Microsoft Azure Tools for Microsoft Visual Studio 2013 - v2.4.20730.1601

Microsoft Azure Tools   2.5
Microsoft Azure Tools for Microsoft Visual Studio 2013 - v2.5.30319.1603

Multilingual App Toolkit   3.1.1250.0
Multilingual App Toolkit helps you localize your Windows Store app by providing file management, pseudo and machine translation, translation editor, and build integration. http://go.microsoft.com/fwlink?linkid=245767

NuGet Package Manager   2.8.60318.734
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.

Office Developer Tools for Visual Studio 2013 ENU   12.0.31105
Microsoft Office Developer Tools for Visual Studio 2013 ENU

PreEmptive Analytics Visualizer   1.2
Microsoft Visual Studio extension to visualize aggregated summaries from the PreEmptive Analytics product.

SQL Server Data Tools   12.0.41025.0
Microsoft SQL Server Data Tools

Windows Azure Tools   2.3
Windows Azure Tools for Microsoft Visual Studio 2013 - v2.3.20320.1602

Windows Phone 8.1 SDK Integration   1.0
This package integrates the tools for the Windows Phone 8.1 SDK into the menus and controls of Visual Studio.

Workflow Manager Tools 1.0   1.0
This package contains the necessary Visual Studio integration components for Workflow Manager.

Xamarin   3.11.666.0 (ebae43a)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.

Xamarin.Android   5.1.4.16 (5f55a9ef61c11b6ce0890bc91e4c71b1b92be214)
Visual Studio plugin to enable development for Xamarin.Android.

Xamarin.Forms Intellisense   1.0
Provides intellisense for Xamarin.Forms in the XML editor.

Xamarin.iOS   8.10.2.0 (67b390d0d1bd741582cf7b7fd3ffea08583a3f83)
Visual Studio extension to enable development for Xamarin.iOS.

Xamarin.iOS Unified Migration   1.0
Automated migration for Xamarin iOS Classic projects to Unified

Xamarin.TestCloud.Integration   1.0
Early preview of Xamarin Test Cloud integration
Comment 1 Chris King 2015-07-10 17:03:39 UTC
I'm seeing the breakpoint in the setter of MyBool hit when I toggle the switch from the UI on emulators and my physical device. Does this happen for you on all your devices and emulators?

Warm regards,
XFT
Comment 2 Jon Goldberger [MSFT] 2015-07-10 17:10:24 UTC
Hmm, I only tested the WinPhone 8.1 app on a WinPhone 8.1 emulator. The Windows 8.1 app obviously was tested on local machine. I saw the issue on the Winphoen 8.1 emulator and on the Windows 8.1 app running on the local machine. Perhaps try the Windows 8.1 app?
Comment 3 Bruce McMillan 2015-07-11 06:41:55 UTC
Been reading the comments on the log and would add this as a comment

The UI issue is with 8.1 store and Phone 8.1 devices and emulators
The issue is NOT seen with the Droid version on either emulator or device
The issue does NOT occur on the IOS emulator - I have not tested the actual device
this is NOT an issue with the silverlight 8.1 version of the emulator ( which is the same emulator, ) which points to the universal DLL's

The setters are called on satrtup when the view model creates the data
There seem to be a couple of Random getter calls after the setters ( not sure of the call stack here )

I have tried this with the latest and previous versions of the forms and it reacts the same way.

Hope this helps ?
Comment 4 Jon Goldberger [MSFT] 2015-08-04 20:32:00 UTC
Setting status back to new as more info was provided.
Comment 5 Ram Chandra 2015-08-17 11:25:20 UTC

*** This bug has been marked as a duplicate of bug 31964 ***