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When attempting to use the Forms Previewer while editing XAML, Visual Studio grinds to halt. This is seems to be triggered by entering text into the editor. When this issue occurs, either text input will become extremely slow (seconds between typing a character and having it appear on screen) or Visual Studio will restrict actions and report that Visual Studio is busy
# Steps to Reproduce
1. Create a Xamarin.Forms app using the Master/Detail template
2. Build the app (so that Forms previewer can operate)
3. Open a XAML file and previewer
4. Attempt to edit some XAML
5. Continue to edit XAML until issue occurs
# Expected Results
Editing XAML should continue unabated
# Actual Results
The IDE will slow and/or become unresponsive
Microsoft Visual Studio Enterprise 2017
Version 15.2 (26430.6) Release
Microsoft .NET Framework
Installed Version: Enterprise
Visual Basic 2017 00369-60000-00001-AA546
Microsoft Visual Basic 2017
Visual C# 2017 00369-60000-00001-AA546
Microsoft Visual C# 2017
Visual C++ 2017 00369-60000-00001-AA546
Microsoft Visual C++ 2017
Visual F# 4.1 00369-60000-00001-AA546
Microsoft Visual F# 4.1
Application Insights Tools for Visual Studio Package 8.6.00404.2
Application Insights Tools for Visual Studio
ASP.NET and Web Tools 2017 15.0.30503.0
ASP.NET and Web Tools 2017
ASP.NET Web Frameworks and Tools 2017 5.2.50303.0
For additional information, visit https://www.asp.net/
Azure App Service Tools v3.0.0 15.0.30209.0
Azure App Service Tools v3.0.0
Common Azure Tools 1.9
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.
KofePackagePackage Extension 1.0
KofePackagePackage Visual Studio Extension Detailed Info
Merq 1.1.17-rc (cba4571)
Command Bus, Event Stream and Async Manager for Visual Studio extensions.
Microsoft MI-Based Debugger 1.0
Provides support for connecting Visual Studio to MI compatible debuggers
Microsoft Visual Studio VC Package 1.0
Microsoft Visual Studio VC Package
Mono Debugging for Visual Studio Mono.Debugging.VisualStudio
Support for debugging Mono processes with Visual Studio.
NuGet Package Manager 4.2.0
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.
SQL Server Data Tools 15.1.61702.140
Microsoft SQL Server Data Tools
TypeScript tools for Visual Studio
Visual Studio Tools for Universal Windows Apps 15.0.26430.06
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 22.214.171.1243 (c871575)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.
Xamarin.Android SDK 126.96.36.199 (448f54f)
Xamarin.Android Reference Assemblies and MSBuild support.
Xamarin.iOS and Xamarin.Mac SDK 10.10.0.30 (30b6e87)
Xamarin.iOS and Xamarin.Mac Reference Assemblies and MSBuild support.
I have the same problem.
when i switch to another xaml page.
I am work in visual studio 2017. if i had connect to a mac; but now, this mac is shutdown, i still keep connection, so vs2017 just like stoped,no answer, no responce.
open xamarin mac agent, ignore all conneted mac;
I am work in visual studio 2017. if i had connect to a mac; this mac is shutdown, but i still keep connection, Then open Xamarin.Forms.Previewer and edit xaml page, case vs2017 like stoped,no answer, no responce.
open xamarin mac agent, ignore all conneted mac;
The hang you are seeing is most likely a duplicate of #56512. Our QA will re-test the builds anyway to verify everything works as expected.
If the performance issue you're seeing is completely separate to the hang you are experiencing can you attach a copy of the logs from a session where it got really slow? You can find the logs by clicking Help -> Xamarin -> Zip Xamarin Logs.
I'll mark it as needinfo for now while we wait for confirmation about the performance issue.
Let's duplicate this bug report and deal with everything on bug #56651.
Linwen, if you can read the third comment there ( https://bugzilla.xamarin.com/show_bug.cgi?id=56651#c3 ) and append your own information it would greatly help us diagnose the root of the problem. Thanks!
*** This bug has been marked as a duplicate of bug 56651 ***
*** Bug 57300 has been marked as a duplicate of this bug. ***