I'm using ReactiveUI in my WPF program, the WPF Window can be initialized and show normally, and I'm under Debug Mode,
but sometimes When I run some command code binding with button, it shows error below, and there're not more information, so I have no idea what's the reason to the Exception:
ReaciveUI.pdb contains the debug information required(...)
and after Continue, a window shows then the program was stopped:
An unhhandled Exception of type 'System.Exception' occured in ReactiveUI.dll
How to deal with this problem?
I found the keypoint of the problem later, the bug happens at
BtmCheckCmd = ReactiveCommand.CreateAsyncTask(
canBtmCheckCmd, //CanExecute
async _ =>//Execute
{
ProgressWinDow.RunCheckAndBarHandle();
MessageBox.Show("SomeThing");
}
I find a new way to check whrere the problem I former don't know so later I could found the solution.
In my case when the exception before happens, sometimes the messagebox show (sometimes not), then if the messagebox show, somtimes after click OK and the Exception Window Show, and if doing like this I can't find which part of my code does the problem haapen,
but if I click pause when the messagebox show(not click OK, but click pause under debug mode when msgbox show), then it go to the part of code it execute,
and by doing this I find the "Messagebox show" is in the code block of
async
in the part of code, and there're two method in async, so it should be the reason to this problem, maybe something wrong when async two method at the same time.
And In my case, the Messagebox is originally just used to test, so I delete the MessageBox and the problem solved.
Another way to find the problem in multi-thread is under debug mode,
and set the break points, then execute that part of code, when going into a break point, then go to the top ToolBar select :
Debug>>Windows>>Threads
then in the threads window can see what are the threads doing
In my case Visual Studio (2022) had locked a file.
To locate the locked file I did (in a console at the root of my project):
git clean -xfd
This gave me a message about several files which VS was locking.
But ultimately, the solution was to kill Visual Studio, perform a git clean, and then rebuild. You may also need to log out if on Windows to release the locked file(s) before rebuilding.
Related
I'm new to c#. Antivirus deleted the mySolutionName.exe file out of the /debug directory and now I cannot execute my code. I'm concerned that anything I do may make the issue worse.
When I press F5 I get an error of:
CS2012 C# Cannot open for writing --> C:\Users\me\source\repos\MyApp\MyApp\obj\Debug\MyApp.exe''
Can someone please tell me how to rebuild the file so that I can continue developing?
after your edit:
Your program is probably still running outside of the debugger.
You need to use the task-manageer to kill all instances of MyApp.exe if this doesnt solve your issue a reboot should do the trick as well
So why is this happening?
Most liky your application is somewhere stuck on a blocking function or in a never ending loop. maybe there is even a seperate thread still operating that you forgot to close. We lack some information to tell yout that for sure. But to find out what is happening you can close your window while running in debugger mode and see if the application properly closes. if it doesnt you can hit pause and see where the program is stuck and resolve this issue by ending the task/loop/whatever in your OnClosing function of your window.
A good way to solve this issue is looking which process currently accesses the file.
A tool to do that is Microsoft SysInternals Process Explorer. It has a feature called "Find handle or DLL ..." which can be accessed by Ctrl+F.
The result will show the process which accesses the file. You can then judge whether it's Antivirus or something else that prevents you from writing to the file. If possible, you can then take an action in that program to release the file.
Example: a program is accessing my powerpoint presentation, which has the term "Schulungen" in its file name.
Process Explorer figures out: it's open in Powerpoint.exe, so I can simply close the file in Powerpoint - problem fixed.
This seems to be a WPF-specific issue.
If I set a breakpoint in the code, the program will pause when it reaches that line, and I can edit/add/remove code, and then continue - it runs the newly edited code (ie, it behaves as expected).
However, if I hit 'Break All', I get moved to window that says "Your App has entered a Break State...". If I try to edit my code, nothing happens. I try to type but nothing happens - no text appears, and there's no errors that pop up or anything.
I don't have this problem in WinForms applications - just WPF. If I create a basic WPF project from the template, I still have the issue.
It's a very frustrating issue! My ugly hacked solution is to add a button to my program's UI called 'Break', which executes a single line of code that has a breakpoint on it, basically recreating the behaviour that 'Break All' should have.
Weirdly, it's not an issue if I'm on a WPF project which uses multiple threads. Hitting 'Break All' in this case acts as if there's a breakpoint on the line of code where the background thread is set up.
I am not sure..but you can give a try.
To enable/disable Edit and Continue. In the Options dialog box, expand the Debugging node, and select Edit and Continue. In the Options dialog box Edit and Continue page, select or clear the Enable Edit and Continue check box. The setting takes effect when you restart the debugging session
source:https://msdn.microsoft.com/en-us/library/ms164926.aspx
I'm having a problem in Visual Studio 2012/C# which is driving me crazy. I have a particular line of code in a C# file with NO breakpoint set. Every time this line should be executed the debugger interrupts the execution of my code like a breakpoint was set. The only difference i noticed is the arrow on the left hand side, indicating the current step. Usually this arrow is yellow (when a breakpoint is set). In my case it is grey.
I have been searching for a solution but did not find anything useful to this. I tried deleting all breakpoints, build project, rebuild project, clean project and it still appears.
Does anyone have the same problems and found a solution this?
normal arrow:
arrow in my case:
This line of code is currently executing, it calls something else, e.g. native code or .NET internal code and an exception happens there. You can see both arrows in the call stack window:
Perhaps you need to turn on "Show external code".
If you can't see the exception dialog, usually you can show it like this:
Visual Studio Debug does not stop when i close the form that i write in C#. How can i stop debug process when i close form. I added Application.Exit() method in the form closing event but it didn't work.
Thank you.
Try this from here
If (System.Windows.Forms.Application.MessageLoop)
{
// Use this since we are a WinForms app
System.Windows.Forms.Application.Exit()
}
Else
{
// Use this since we are a console app
System.Environment.Exit(1)
}
EDIT:
If there are running infinite threads then do
Thread myThread = new Thread(...);
myThread.IsBackground = true; //set your running thread to background
myThread.Start(...);
And you can see how to? from here
Well this will be four years too late, however, I thought I'd post this for anyone else who runs into this issue (like I just did), sorry in advance if this is pretty basic, I'm fairly new to C# so this threw me for a bit.
I had the same issue as OP where, in my FormClosing event, neither Application.Exit() or Environment.Exit(0) would end the debugger.
The thing I found was looking at the reference count above my FormClosing event, it was showing '0 references'. I had just copied and pasted the closing event from another forum so there was no event handler to actually handle the event I had created/copied.
One easy way to resolve this (besides not copy and pasting code) was to create the event handler:
First go to the 'Form1.cs [Design]' tab
Navigate to the 'Properties' box
Click on 'Events'
Find 'FormClosing' and double click that
If you had the same issue you should now be able to see that there is at least 1 reference to the event. Now when you close the form it should also stop the debugger.
I landed on this question because VS was not stopping when a debugged application was shut down.
One way to see what might be causing the ide to hang is to click on pause and on the 'Debug Location' toolbar view any threads that are still running. For me I noticed that there was still a RabbitMq context that was not disposed of. So this was the clue i needed.
After I made the code change, VS now stops it debugging session once the application exits.
I know this is not a solution that you might be expecting but finding out why applications are not exiting properly or still keeping background processes alive is a very tricky subject. The active threads drop down is the best place to look imho.
Another possibility is, that your process runs in an exception which isn´t handled correctly. I used to show exception messages in self-build dialogs, but forgot to show the created window in one case. So the program ran into the exception, created the window but just didn´t show any sign of it... so the process kept running even when I closed the application.
When I run my code within VS, when I enter certain methods, upon ending the application (closing the form) been debugged, VS does not end the debug session automatically forcing me to end it manually.
This doesn't always happen, the results are consistent with certain windows / classes loaded when the application is run within VS.
I want to know why this may be, I'm assuming its an indication of a file not been closed in my managed code or 'something' like that.
Why might this occur and how can I trace and fix it?
This would happen if your code keeps running after closing the window.
Pause the debugger after closing the window to find out what it's doing, then modify the code so that it stops running when you close the window.
On Debug menu, click "Detach All".
Hope that helps!
EDIT
Follow, SLak's advice, as that will go after the problem. My solution may only fix the symptom. I will leave the answer here just in case it is helpful to you though.
Good luck!