在AppDomain.UnhandledException处理程序中获取例外对象

Question

I'm using an AppDomain.UnhandledException event handler to perform some logging when my application crashes due to an unhandled exception.

void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e) {...}

I would like to be able to log the typeof(object) and various object fields/properties when the source of the unhandled exception is one of my custom object classes, but it seems that this information is not included either in the UnhandledExceptionEventArgs or as the sender object. I tried casting sender but understandably the sender is simply the AppDomain which has raised the exception.

Is there a way to retrieve this information from within this event handler? The only other thing I can think of is to use a static field to store a reference to an object each time that an object throws, but I think that requires that I have a static field for each type I want to do this for.

Note: I am aware that the stack trace may lead me to the source of the exception, however this does not allow me to log important state information regarding that object during the crash.

For example, if my stack trace from e.ExceptionObject is

Stack Trace: 
   at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)
   at CustomLibrary.CustomObject.readCallback(IAsyncResult ar)
   at System.Net.LazyAsyncResult.Complete(IntPtr userToken)
   ...

I would like to be able to get a reference to the NetworkStream object, which will allow me to locate the associated CustomObject in a collection.

Answer 1

Try Using below code and see that exception is getting caught or not.. Also just check whether anywhere in your code your are rethrowing the exception like throw ex . If yes than it will eat up the stacktrace that you are looking for, try rethrowing using just throw .

  [STAThread]
    static void Main()
    {
    AppDomain currentDomain = default(AppDomain);
    currentDomain = AppDomain.CurrentDomain;
    // Handler for unhandled exceptions.
    currentDomain.UnhandledException += GlobalUnhandledExceptionHandler;
    // Handler for exceptions in threads behind forms.
    System.Windows.Forms.Application.ThreadException += GlobalThreadExceptionHandler;
    ...
    }

private static void GlobalUnhandledExceptionHandler(object sender, UnhandledExceptionEventArgs e)
{
   Exception ex = default(Exception);
   ex = (Exception)e.ExceptionObject;
   ILog log = LogManager.GetLogger(typeof(Program));
   log.Error(ex.Message + "\n" + ex.StackTrace);
}


private static void GlobalThreadExceptionHandler(object sender, System.Threading.ThreadExceptionEventArgs e)
{
   Exception ex = default(Exception);
   ex = e.Exception;
   ILog log = LogManager.GetLogger(typeof(Program)); //Log4NET
   log.Error(ex.Message + "\n" + ex.StackTrace);
}

Hope this helps!