I have an issue with Visual Studio 2010 and an ASP.NET 2.0 project.
I have searched StackOverflow for a possible solution to my problem, but even though there are alot of articles related to the Visual Studio debugger, none specifically solve my issue.
Every time I start debugging, Visual Studio tells me that "The breakpoint will currently not be hit. The source code is different from the original version.". In the past when I got this problem, I could solve it by doing a Clean Solution. Or if that didn't work, I could always restart Visual Studio or my machine and the problem would be gone. This, however, doesn't work anymore. The solution cleans and I can rebuild, but the debugger still complains about the source.
I found that if I delete the folder "root" in "C:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files", the problem is temporarily gone but only the next time I start the debugger, and only for the breakpoints that are currently set in the project. All breakpoints I add when the debugger is running are also not being hit due to the source/original difference.
I don't know how to solve this issue permanently because I don't want to delete that folder every time I have to start a debug session.
I also have a few ASP.NET 4.0 projects that debug just fine.
I use Windows 7 Enterprise (x64).
If someone has a suggestion I would very much appreciate it :)
Try this
Right click solution.
Click "Property"
Go to: "Common Properties" -> "Project Dependency"
Select your "project" from drop down list
Check every item in list of "Depends on"
Click "OK"
Now Open "Task Manager"
And kill all worker process i.e. "w3wp" in case of iis7
Or Kill all "WebDev.WebServer40.exe" process
Now run your application.
Related
I've always used System.Diagnostics.Debugger.Launch() as a quick way to debug web services. I get a dialog asking me to choose a debugger, I pick "New instance of Visual Studio" and it fires up VS and lets me step through the code.
That has suddenly stopped working. Now I get the dialog, and choose Visual Studio, and the VS splash screen appears, and then it just hangs. The dialog window says "Not Responding" and I have to force it to close. Even then, a VS instance is left hanging around in Task Manager and I have to kill it manually.
I've tried repairing Visual Studio, and uninstalling and reinstalling Visual Studio, and nothing fixes it.
In desperation, I completely flattened my PC and reinstalled everything from scratch. It lasted about a day and then JIT debugging started hanging again. I was on Windows 10 and Visual Studio 17.4.1 before, and I'm on Windows 11 and Visual Studio 17.4.2 now.
To make sure that it's not a problem with some particular code, I created a one-line console app System.Diagnostics.Debugger.Launch(); and that crashes just the same.
Has anybody experienced anything similar, or have any idea what could be going wrong?
I don't know why that fails, but I suggest to attach to a running instance of Visual Studio instead. Start Visual Studio first, and then when the "launch debugger" window appears, select the running VS instance. Preferably, you should even open the correct solution/project first. If you attach to that instance, all your source code and the project structure is available for debugging.
Another alternative: Instead of using Debugger.Launch(), use a code snipped such as
while (!Debugger.IsAttached)
{
Thread.Sleep(100);
}
at the beginning of your program and attach the debugger from within Visual Studio (using the menu option Debug->Attach to process)
I had the same exact problem and after updated to VS version 17.4.4 the issue disappeared. All good now.
Every time I try to build my solution in VS2013, nothing builds, no errors - But in the status bar it says: "This item does not support previewing"
I googled around a bit but have come up empty.
But if I right click on each project and select build it works fine.
Any ideas?
Perhaps this message is totally unrelated... Post hoc ergo propter hoc
Steps to reproduce on my machine:
Right Click any project in solution: select build
Status bar displays Build successful
Right click solution select build
Status bar displays : "This item does not support previewing"
Perhaps it isnt related, but it sure does appear to be.
I was able to fix this... Somehow nothing was selected to build in the solution configuration. I right clicked on the solution, went to properties and then selected COnfiguration Properties and clicked the Build box for all the projects...
I have no idea how they became unchecked, only thing I can think of is a co-worker was trolling me.....
I've had this problem (i.e. debug not starting, and no error message) with Visual Studio 2015 in the following two cases:
after loading a solution that had previously been built with Visual Studio 2010
and also after using the "save as" function in Visual Studio 2015 to update a solution that had been started with Visual Studio 2010 (using Save as updates the solution file and sets the active Visual Studio version to 14 - i.e. VS 2015).
In both cases, deleting the bin and obj directories under the startup project fixed the problem. It's also worth closing visual studio and making sure that there are no {yourprojectname}.vshost.exe processes still running - if there are then kill them before running visual studio again. On that note, if you have multiple versions of visual studio on your machine, you should also check that you don't have the same solution open in the other version of visual studio at the same time (I've done that one myself).
One of the comments here suggests disabling the "enable visual studio hosted process" option. Don't do that if you can at all avoid it: you'll lose lots of debugging functionality (particularly in the area of being able to edit code while your solution is running).
Hope that helps someone out there.
Solution for VS2015
"this item does not support previewing" vs2015 (Visual Studio 2015/2016)
Step 1. Go to Control Panel -> Programs and Features
Step 2. Uninstall all: Windows Software Development Kit - Windows 10.0.10586.15 (maybe you have diff ver)
Step 3. Download new latest Windows Software Development Kit
https://go.microsoft.com/fwlink/p/?LinkId=619296
Install & Create new project, Done!
Dclick on MainPage.xaml and you will see Loading designer...
1: Add below lines in App.conf
<specFlow>
<unitTestProvider name="MSTest"></unitTestProvider>
</specFlow>
2: add a reference to Microsoft.VisualStudio.QualityTestTools.UnitTestFramework.dll
right click on your project and select: Add Reference
3: add using Microsoft.VisualStudio.TestTools.UnitTesting; in Step Defination
4: goto feature file and run it. This is what solve my problem on vs2013
I faced same issue with .aspx file. I just right click on the .aspx file and select open with (HTML Editor). You can choose any form the list.
I have come across the same issue for me, I have opened a project in VS 2010 and then when I open the same in VS 2015 then his error has occurred.
Solution:
By Closing the VS2010 project solution fixed the issue.
Whenever I try to debug a Visual Studio 2010 web project, VS hangs, and ultimately crashes. This happens if I try to start the project using F5, or through Attach to Process, before the process list even appears.
Hitting F5 in, for example, a Windows Form project works fine, but attach to process fails here too.
Any ideas on what can be causing this? Obviously attaching to the devenv.exe process won't work as I can't get the Attach to Process dialog to appear...
Oh, running W7 (x64), VS2010 SP1 (had same problems without SP1)
In Solution Explorer there is a Show All Files icon (highlighted in the photo below):
Make sure it's turned off,
When It's turned on, Visual Studio tries to index all the files in the solution and if you have a giant Solution it could take forever!
I hope this has helped someone :)
Have you recently installed Mono and/or Mono Tools for VS2010?
I found that to be the problem it my case. Not sure why, but it somehow got in the way.
Matthew
In my case hangs when executable type was not correctly set, ex. Managed v4.0 and trying to attach to Native.
I've been using a solution since VS2010 was released. My solution has a number of projects in it. Until a couple of weeks ago, all was fine. All of a sudden, whenever I click the button to start debugging my code, the Visual Studio 2010 installer starts.
It takes around 5 minutes for it to complete and then I am able to debug as normal. If I restart the debug session then I have to wait for the installer again.
I haven't tried cancelling the installer, but I just want to stop it altogether.
Has anyone experienced a similar issue? How can I solve this? Its doing my head in!! :S
Thanks
Neil
I would recommend reinstalling Visual Studio. If that doesn't help something else might be wrong with your system and you may end up to re-image it. Being able to re-image a development PC can be a life-saver at times.
When you say "Visual Studio 2010 installer" do you mean the installer for Visual Studio 2010 or an installer project inside your solution? If it's the latter then you may want to check that that project isn't specified as the startup project (right'click Solution -> Properties -> Common Properties -> Startup Project -> Choose "Single startup project" and specify the project you want the debugger to run when you press F5 or the debugger button. Hope that helps.
When trying to execute from within Visual Studio 2008 your application and you get the (uninformative) message "The operation could not be completed".
The solution to this is to turn off the "Visual Studio Hosting Process".
The problem with turning off this "hosting process" is that all the "run and rewrite" functionality is no longer available. OK, so this isn't a big deal, but I'm always getting this message no matter what machine I use (and it might be nice once in a while to use the rewrite and execute functionality).
Am I doing something wrong? How come this "feature" within VS seems to complain so readily? Do other people have success with enabling the hosting process and making use of it?
The problem with turning off this "hosting process" is that all the "run and rewrite" functionality is no longer available.
The Visual Studio Hosting Process is not needed to allow Edit and Continue. It is used for "Design time expression Evalutation" in the case where the project is a dll rather than an EXE. It is also used to provide debugging for partial trust scenarios. See the documentation for everything it does.
It is highly unlikely it does anything you need, so don't feel bad turning it off.
Is your project output folder set to a network share?
If so, try changing it to a local folder and see what happens. It appears that VS is not always able to terminate the process if the host exe is running from a share.
The other possibility is that the project is open and running in debug mode on another instance of Visual Studio - although I suspect you will allready have ensured this is not the case.
I honestly have never seen this message and I work with Visual Studio for at least 8 hours a day. Is this reproducible on other machines? If so is there anything weird or abnormal in your code that could cause this to crash?
I use 4 different machines and have got this situation on all of them. I understand what is causing the problem - it is that the VS hosting process isn't terminating after the first debug session ends, which means that the next time that you try to compile the exe the hosting process is locking the exe and preventing compilation. Another solution therefore is to use Task Manager to kill the VS hosting process and compile and debug as normal but thats even more of a hassle!
I can't think that its anything in my code that would be causing this - its probably a VS issue itself isn't it?
Here's the anwser: disable "Enable he Visual Studio hosting process" in he debug tab of your projects properties.
I found it here:
http://social.msdn.microsoft.com/Forums/en-US/vbide/thread/40d2d241-a0c0-4137-9da9-e40611972c0e/
There are several causes and workarounds regarding to this problem and you might try the following ones that are useful most of the time:
Delete the "Your_Solution_FileName.suo" file and restart Visual Studio.
or
Right click on the project and select Unload Project and then click Reload Project by right clicking on the project again might also fix it.