May 10, 2012 09:26 PM|mishra.bhupesh|LINK
I am sorry I can't under stand you question so please Ignore my previous post.
As you are retriving image from database, where you will retrive image by datareader["imageColum"] or by stroed procedure's output parameters, it will thorw NullReferenceException if no blob. So you can do:
//database retrival code
Image1.ImageUrl="Url of HDD";
Otherwise please put you coding effort here ,it may help to solve the issue.