Ok, I'm at a loss.. I have never seen this happen before. I am using Visual Studio. I have been working on a regular WPF project. It was working fine. This morning, I made a few changes to add a .dll project to my solution and link directly to it. Now, I click the green arrow, or F5 to start debugging, and it clicks and then goes green again. There is no debug output, the program doesn't start running. There are no exceptions thrown. What the heck happened?
It's a pretty big project, so I can't put any useful source code here. I'm just wondering if anybody has ever had a case where they push F5 to start the app, and nothing happens..
Any help would be appreciated. I am at an utter loss as to what would cause this.
WPF apps usually just die without an error message if there is a problem during start-up.
You can try to configure your IDE to break on thrown exceptions:
Debug -> Exceptions:
Check the checkbox in the column Thrown in the row "Common Language Runtime Exceptions".
Ok, I am a blithering idiot. The problem was that I had 2 instances of Visual Studio open at the same time and on the same project. When I closed down Visual Studio, I noticed the other instance and closed it too. Then I opened just one and everything wants to work now.
So wierd, but fixed now.
Word of warning. Only open your project once.... :-)
Thanks to all for the help. You all get points !!
Related
I have a major problem with a Winforms application with a large number of projects. VS 2019 threw an exception and closed a few days ago, and on reopening restored two files since then I have been unable to:
Add a new form to the vast majority of projects, whether the most basic MS template or not
Open the designer for any form that is already in the vast majority of projects
Access the navigation bars (the three combo boxes at the top of the VS work area that normally contain the project, namespace and content information) on any class referencing to WinForms in the vast majority of projects
When trying to do either of the first two things an 'Opening File' message is shown endlessly. If you try to do anything, a notification is shown that Visual Studio is busy, and that Microsoft will be notified but nothing else happens and you can only get out by using the Task Manager to kill all VS tasks.
In the case of the third one, a message is shown saying 'Refreshing Navigation Bars' but again it goes on forever. However, in this case you can click the Cancel button to cancel the loading attempt.
The navigation bars issue I believe is Resharper related. In addition CodeLens is not working at all, so the space for the number of references is generated but there is no content. This is true for ALL files in the solution, not just the form related ones.
Here is what I have tried so far:
Cleaned and Rebuilt the solution - works fine but no difference
Built and deployed the solution - works fine
Deleted the SUO file and reset
Cleared the Resharper caches
Disabled Resharper
Performed a repair install of Visual Studio
Created a new Solution and added forms etc. which was unaffected and worked fine
Opened a different solution which was also working fine
Tried the same processes with a Project in the same solution that is not part of the application (TestBed) and that works fine too, but is the only project that does
Can anyone suggest where to look now? Since new and existing solutions work OK except for this one I am assuming that it is something Solution related rather than something related to VS itself, but I have no idea what that might be. For example, what is it trying to do when it says 'Opening File' (apart from the obvious - opening a file :-)) and what could cause that to fail? Am I looking for something in the Solution file, or could it be something else?
All suggestions and assistance towards resolving this issue would be gratefully received.
Thanks to Jasimov for the only response, I appreciate your attempt to help.
I have now resolved the issue using the following steps:
Uninstall Visual Studio 2019 Community Edition
Perform a fresh install of Visual Studio 2019 Professional
Reload the main solution
Clean the solution
Rebuild the solution
Deal with some issues that were highlighted in the Output and Errors, none of which were directly forms related
Rebuild the solution
Run the application and ensure it runs as expected
Go back and select forms at random and try opening them. All now work as expected.
In addition CodeLens is now working not only properly but actually better than before giving more information more quickly. On the other hand, I have not yet reinstalled Resharper which will be the next step.
I have included all the steps I took just in case anyone else has a similar problem. I have not been able to find this exact issue anywhere else in my searches so I hope it helps someone.
UPDATE: I have since re-installed Resharper with no problems and the designers are all working fine so now back into full flow!
I had a similar issue with the web forms designer in VS2019 hanging as soon as I clicked on anything on the design surface. The same projects were OK in VS2017. Uninstalled VS2019, rebooted, reinstalled VS2019, found that the designer was now working OK. Progressively added back 3rd party toolbox components, one VSIX, and the .Net 4.8 targeting pack. Still working. Thanks for your hint about the reinstall.
I've got a really frustrating error in my Visual Studio 2017 Winforms project.
Unless I have SPECIFICALLY selected the project by clicking on its name, and then pressing start (to debug), it will fail to load my changes that I've just made to a file (Even if I've specifically saved it prior)
(Also when I build it., it stuffs up the indenting / curly braces as you will see at the end of the video.)
I have tried cleaning / rebuilding / deleting bin folders (which works, but only the first time) / closing and reopening VS.
Would be seriously glad of any help!
View video here.
I found the answer here! It was the Resharper Patch by Dim#ster that was causing the issue. So weird!
https://stackoverflow.com/a/21580789/4910205
I'm developing a SL4 OOB application that has suddenly started giving me the white screen of death.
If I try to run it 'in-browser' and check the console I can see the error 2105 : 'Failed to load pre-requisites for the application' but there's very little info about it anywhere.
None of my breakpoints get hit. Even starting the app with F11 (step into) doesn't get me anywhere.
I can run other Silverlight projects just fine so it's not the runtime. I've even copied the source into another project to see if that might help but to no avail.
Does anyone have any ideas how I might get started fixing this?
I have seen this myself and it was a pain..
What I had to do was a system restore, de-installed all traces of Silverlight and Blend and then reinstalled them all. However I had also just installed Silverlight 5 RC which didn't play nicely with Telerik and might have been the problem.
There is also some information about this error here:
http://connect.microsoft.com/VisualStudio/feedback/details/530074/unhandled-error-in-silverlight-application-2105-when-building-as-an-x86-configuration.
Is this your problem?
Damn it, I hate answering my own questions but the problem was quite obscure.
Somehow, I managed to get a regular .Net reference in my Silverlight project through a Nuget package. That was it.
DOH!
I'm running Visual Studio 2010 and using Team Foundation Server, and this thing is pissing me off no end.
Here's the scenario: since I work from home it often happens to me to work at strange hours or on the week-end, when our TFS is offline. This has never been a problem, since usually I just reload the solution and when VS detects that the TFS is not available it promprts you to work offline.
Now, I usually work on WPF projects, and working offline has never be a problem, even when editing XAML files it works with no issues. But now I have to edit a Form from a Windows Forms project, and VS refuses to collaborate. Whatever I do to the form, VS just does nothing other than playing that obnoxious "bing" sound that usually plays when an error of some kind occours. It doesn't even popup an error dialog box, just does nothing!
Any ideas??
Ok figured it out, I had to remove the "Read Only" attribute from ALL the files in the project (I had tried with the project file and form file, but that isn't enough evidently).
I'm using Windows 7 Professional (x64) and having installed .NET 4.0 RTM on my machine.
Since 2 days I'm noticing that every WPF application that I'm trying to run hangs and becomes non responsive (a not responding text is appended to it's title bar) and it's painted white.
There is no info regarding any exception, no error message. Nothing. Even the Event Log shows that there was "application hang" event (code 1002) and nothing more.
This problem is for everything that is written in WPF, even for products like NHibernate Profiler and other stuff that I was using on a regular basis without any issues.
Tried to reinstall .NET 4.0 and nothing changed. Any ideas why this might be happening?
I had the same problem. It was a corrupt font cache!!
See http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/7cc032c1-5f4d-4518-adc6-f53afd051e6b for a solution.
If I had to guess I would say video drivers. It might help to try attaching Visual Studio's debugger to the hung process (Debug -> Attach to Process) making sure that Managed Code is the selected debugger type. Then you can break into the debugger and maybe see a common stack trace.