Check for DbNull:
<_a s p :label runat="server" text='< % # IIF(Typeof(
Eval("ShippedDate")) IS DbNull,"No Date",Eval("ShippedDate")) % >'>
or
<_ ...> I am telling ASP to give the picture a height value only if the value in the database is not NULL. I could've done this in the SQL instruction, but I decided to do it inside the Datalist.
<_ tem : databinder.eval>
Or maybe this for NULLs?: <_ eval>
Or check for NULL in T-SQL:
ISNULL(check_expression, replacement_value) If 1st is NULL, return 2cnd. 
