private static void ExtendedExceptionHandling()
{
try
{
FileProcessor1 processor = new FileProcessor1(GetFileNameFromUser());
processor.Process();
}
catch (FileNotFoundException exception)
{
// This time, we have in our hands a FileNotFoundException
// object that we can investigate to see what went wrong:
//
Console.WriteLine("An exception was raised. Details:");
Console.WriteLine("Exception message: " + exception.Message);
Console.WriteLine("--- FOR THE PROGRAMMER ONLY ---");
Console.WriteLine("Exception source: " + exception.Source);
Console.WriteLine("Exception stack trace:\n" + exception.StackTrace);
}
catch (Exception otherException)
{
// We can define more than one 'catch' block, and indeed
// can simulate a condition where an exception other than
// FileNotFoundException will be thrown.
//
Console.WriteLine("Something unexpected happened. Details:");
Console.WriteLine(otherException.Message);
}
}
private static void NoExceptionHandling()
{
// There's nothing here to handle the possible exception,
// and therefore if the file does not exist, the application
// will crash, displaying the exception details.
//
FileProcessor1 processor = new FileProcessor1(GetFileNameFromUser());
processor.Process();
}
private static void LittleExceptionHandling()
{
while (true)
{
try
{
FileProcessor1 processor = new FileProcessor1(GetFileNameFromUser());
processor.Process();
// Don't forget this line so that the loop doesn't
// become infinite even when nothing exceptional
// happens.
break;
}
catch (FileNotFoundException)
{
Console.WriteLine("File could not be found. Try again.");
// Execution will now continue at the end of the
// while block, effectively restarting the operation.
}
}
}
