I'm using visual studio 2010 sp1, I have an application, and when I run it in debug, the application just stops running. It never pops up highlighting where the unhandled exception occurred, I even have the AppDomain.CurrentDomain.UnhandledException being listened to, and writing any exceptions to a text file, but it never seems to fire.
Any ideas what is going on? If I create a brand new project, and add all my source code to it, it seems to fix it, but eventually whatever setting is being changed is being triggered.
Related
When I ran my C# WinForms executable outside of the Visual Studio IDE for the very first time, I received the following dialog:
"<Application> has stopped working, Windows can check online..."
So I attached to the process using Visual Studio's Attach to Process, which showed that the program had suspended within InitializeComponent() (but did not provide further clues).
I edited the application, placed a try/catch block around the aforementioned code, which allowed me to print the following MessageBox output:
As you can see, this showed that the application is not able to find a DLL it needs.
My question: Could I have achieved this result without modifying the application (that is, without the try/catch block printing out the specifics)? Could Visual Studio Attach to Process functionality guide me to the specific problem being the missing DLL? If so, how?
This information can be found from fusion logs, if you enable them. Fusion logs are helpful in diagnosing if an assembly load fails because of missing dependencies.
Also, sometimes event viewer has useful information.
https://msdn.microsoft.com/en-us/library/e74a18c4%28v=vs.110%29.aspx
I already created an application with the function that could view the database through that application. When on the Visual Studio 2010 (Haven't released yet), the application that I made run smoothly and no error found. But, when I released it and made a Set-up and install it on my computer and when I run the program and click the view database, it gave the error "Object reference not set to an instance of an object, but when I check back in the Visual Studio 2010, the error didn't appear and run smoothly. Just when I install the application, the error appears.
This is the error that I am getting when run the application through installed program, not through Visual Studio 2010 (Debugging):
When I click "Continue", the program run as it is and run smoothly, I just wondering why this error appears only at the installed program, not in the debugging.
Anyone know how would that happen?
Here is the details:
It's quite likely that something got optimized away by the compiler when building in release mode, which can cause surprises at runtime. Perhaps one of your object is being initialized by a side-effect that the compiler "optimized away".
One easy way to try to get to the bottom of the problem is to wrap the call to the offending method in a try/catch, and when catching the exception, pop it up along with a full stack trace in a message box. What you're interested in is the line number where the null reference exception is actually occurring. Or better yet, write it out to a log file with any additional information you would like to know about at runtime. Then, redeploy your application, reinstall it, and give it another go. Once you figure out which object is not being initialized, then you will want to analyze your code to see why that would happen only in release builds and not in debug builds. You should look to see if you're using some sort of pattern (or anti-pattern) where it could affect other places in your code.
I'm using Visual Studio 2008, and working on a winform. Usually, on the event of an unhandled exception, the code will break on the line causing the error. However, it has started simply closing the form. When stepping through the code, it will go straight from the unhandled exception to the form dispose, and close my application.
Have I inadvertently changed an option?
For testing purposes, I created an empty windows form, with only one line:
throw new Exception();
And observed the same behavior. Also, everything is set to break when user-unhandled exceptions arise. I've tried another project without the issue, so it must be project specific.
Go to Menu | Debug | Exceptions... and make sure VS breaks on the proper exceptions.
when i start visual studio 2010 c# .. and open my application i got this. it stopped responding and gives me that message in the picture once my application is opened but other application works fine.
then i debug visual studio 2010 .. and i got the exception
Unhandled exception at 0x76a0b9bc in devenv.exe: 0xE0434352: 0xe0434352.
EDIT: i tried to open the .exe file in project folder in debug folder and i got this.
how to fix that ? what should i do ?
thanks in advance.
Visual Studio is vulnerable to certain exceptions that are raised in design mode. Hard to categorize them, it is an immediate crash to the desktop. The exception code says as much, 0xe0434352 is a low-level managed code exception. You'd normally work around it by checking-in an earlier revision of your control and pay extra attention to code that needs to be disabled at design time by checking the DesignMode property. Your screenshot shows as much, seems like the control is actively displaying runtime info while in design mode. Risky.
If you want to debug it then you can by starting another instance of Visual Studio and use Tools + Attach to Process to attach to the first one (devenv.exe). Debug + Exceptions, tick the Thrown boxes for CLR exceptions and Win32 exceptions. Switch back to the first instance and load your project.
i've figured out what happened .. my form got 3 usercontrol that i made before.. one of those usercontrol has a customized progressBar which is a library .. for some reason that library stopped working .. so i removed it .. then added again from that usercontrol .. then the application worked.
I've started working on an old project, where WinForms application uses DevExpress controls, for example DataGrid.
The program window contains another multiple windows, and when I'm minimizing some of them, I get an Unhandled Application Exception with Attempted to divide by zero. in details. I want to know what causes this exception, but when I run the project in Debug mode in Visual Studio (2005 version), it does not react in any way to this exception.
Is there a way to find out the reason this exception is thrown?
Enable such exceptions in
Debug -> Exceptions -> Common Language Runtime Exceptions
Also
Also, it is a good idea to turn off the Tools-->Options-->Debugging-->Enable Just My Code option.