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Displaying and writing C # exceptions

I have a C # program that outputs NullReferenceException()

. When I run this on my Vista machine, it gives the familiar "Foo has stopped working" screen. I can easily hit "details" to see what went wrong. On one XP machine there is no warning: the program simply exits, and on another XP I get the message "Foo has found the problem ...". Is there a way to change this setting (XP)?

Also, I would like this error message to be written to the log file so I can figure out what went wrong if someone else is using my program. Is there a way to send unused exceptions to a file?

edit: I want this for the whole project, not just the critical section. I didn't think it was recommended to use the whole program in bulk try...catch

, or is it?

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5 answers


Take a look at: UnhandledException and ThreadException .

You can log errors to a file or use Windows logging tools .



You can also try this and this , it should point you in the direction you want to go. This post is about the same problem that you are trying to solve.

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If you are targeting WPF, you can use DispatcherUnhandledException

to catch any exception that you don't handle in your code. Otherwise, be sure to catch any observable exception with try-catch blocks.



In a delegate DispatcherUnhandledException

or in a section catch

of a try-catch block, you can call a function that writes an error message to a log file.

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Add try-capturing blocks about all the components you think will fail and handle them by streaming the error data to the log file

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See this link:

http://blogs.msdn.com/csharpfaq/archive/2006/03/27/562555.aspx

This will get you to work.

Using:

try
{
    // Your code here
}
catch (Exception ex)
{
    // This will tell you the Exception
    Console.WriteLine("Exception type: {0}", ex.GetType());
    // or, if you use the example from the link above
    LogMessageToFile(String.Format("Exception type: {0}", ex.GetType));
}
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You can complete your code in

try
{
    // Your code
}
catch (Exception ex)
{
    streamWriter.WriteLine("your custom exception text, stack trace:" + ex.StackTrace.ToString());
    MessageBox.Show("Your custom exception text, Stack Trace:" + ex.StackTrace.ToString());
}

and handle the feedback yourself with a stream record object pointing to the log file of your choice.

If it is a winforms application, you can enable a message box or custom dialog informing the user of what happened as shown above.

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