#886 – Setting the HelpLink Property when You Throw an Exception

You can use the HelpLink property of an Exception object to point to a web page that might have information that is relevant to the exception that you are throwing.  Exception handling code could then use the property to navigate to a web page.

In the code below, we throw an exception if the caller asks a Dog to bark too many times.

        public void Bark(int numTimes)
        {
            if (numTimes > 12)
            {
                Exception xx = new Exception("Too much barking");
                xx.HelpLink = "http://www.ehow.com/how_4510663_stop-dog-from-barking-much.html";
                throw xx;
            }

            Console.WriteLine(string.Format("{0}: Woof", Name));
        }

In our exception handler, we then navigate to a web page if HelpLink has been set.

            try
            {
                Dog d1 = new Dog("Jack", 15);
                d1.Bark(1000);
            }
            catch (Exception xx)
            {
                Console.WriteLine(xx);
                if (xx.HelpLink != null)
                    Process.Start(xx.HelpLink);
            }

886-001

Advertisements

About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

One Response to #886 – Setting the HelpLink Property when You Throw an Exception

  1. Pingback: Dew Drop – July 12, 2013 (#1,584) | Alvin Ashcraft's Morning Dew

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: