(Ch. 15)- p.564

Tulsi · January 7th, 2013, 03:33 PM

Hi Imar,

Just wondering if it makes sense to add a friendly message of some sort for the case if a review does = null (

Quote:

Your cleints may have a bookmark for a page with a specific ID in the query string.....the review can't be found and a so called Null Reference exception occurs.

)

Is it common practice to add some sort of friendly message for this case?

Thank you.
Tulsi

Imar · January 8th, 2013, 04:03 AM

Yes; what you want to do is this:

1. Check if the instance is null
2. If it is, display a message to the user (by making a Panel visible for example) that explains the item cannot be found.
3. Set the Status code of the Response to 404. This marks the item as "Not Found" which tells search engines they can stop requesting that page. Chapter 18, page 693 has sample code on how to do this.

Cheers

Imar

Tulsi · January 8th, 2013, 01:27 PM

Thank you. I will try this out.

Tulsi