How to shutdown a WPF application if an exception occurs?

Question

Possible Duplicate:
shutdown wpf while messagebox open

I currently have code like this, but the problem is that even after I show the error in a MessageBox provided by NLog, I want to shut down the app, so the user can fix the problem, but the app continues after they click OK in the message box.

private void Load(string fileName)
    {
        try
        {
            var environments = GetEnvironments(fileName); 
        }
        catch (FileNotFoundException ex)
        {
            logger.Error(ex.StackTrace);
        }
        catch (Exception ex)
        {
            logger.Error(ex.StackTrace);
        }
    }

http://stackoverflow.com/questions/11828826/shutdown-wpf-while-messagebox-open — Bathineni, Oct 04 '12 at 15:59

score 5 · Answer 1 · answered Oct 04 '12 at 15:58

5

The exception has been handled so will not bubble up.

You have several options:

Rethrow the exception after logging, causing the exception to continue bubbling up (and assuming there are no other exception handlers) and causing the process to abort with an unhandled exception:
```
throw;
```
Shutdown explicitly using Environment.Exit
```
Environment.Exit(-1);
```
Another option is Application.Shutdown:
```
Application.Current.Shutdown();
```

Rethrowing will show an error to the user. The other two options will not.

answered Oct 04 '12 at 15:58

Oded

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Is one preferred over the other, I also saw some code that was something like Application.ShutDown (I don't think it was exactly this...) – Xaisoft Oct 04 '12 at 15:59
It was this `Application.Current.Shutdown();` – Xaisoft Oct 04 '12 at 16:00
Can you elaborate on why `throw` does not allow the app ton continue? – Xaisoft Oct 04 '12 at 16:01
In my case, NLog displays a message box to the user, so I guess throw is not necessary here. – Xaisoft Oct 04 '12 at 16:01
@Xaisoft - Probably. And the error message that comes up is not very nice. `Environment.Exit` is good to give the calling process (if scripting the application, for example) an exit code, which could indicate the type of error. – Oded Oct 04 '12 at 16:03
Yes I noticed, thanks for the help. – Xaisoft Oct 04 '12 at 16:03
I noticed you can't call `Application.Current.Shutdown()` from a class library, so I guess Environment.Exist is sufficient in this case? – Xaisoft Oct 04 '12 at 16:13

How to shutdown a WPF application if an exception occurs?

1 Answers1