Code Forums - View Single Post - ASP N00b - How to check if a variable is set? or empty?

rdove · 11-04-2004, 10:19 AM

no

var = "" is closer to IsNull(var), but not the same.

IsEmpty is completely different.

var = ""
IsEmpty(var) - returns false

and

var = Empty
IsEmpty(var) - returns true

and

Dim var
IsEmpty(var) - returns true

IsEmpty:
http://msdn.microsoft.com/library/de...fctisempty.asp

IsNull:
http://msdn.microsoft.com/library/de...sfctisnull.asp

All vbscript functions:
http://msdn.microsoft.com/library/de...ifunctions.asp

11-04-2004, 10:19 AM	#4 (permalink)
rdove Masked Moderator Join Date: May 2002 Location: Indianapolis, IN Posts: 260	no var = "" is closer to IsNull(var), but not the same. IsEmpty is completely different. var = "" IsEmpty(var) - returns false and var = Empty IsEmpty(var) - returns true and Dim var IsEmpty(var) - returns true IsEmpty: http://msdn.microsoft.com/library/de...fctisempty.asp IsNull: http://msdn.microsoft.com/library/de...sfctisnull.asp All vbscript functions: http://msdn.microsoft.com/library/de...ifunctions.asp __________________ ~Ryan