testing for cookies' existance

[darrel]

in ASP, this seems to work to see if a cookie exists:

If Request.Cookies("site")("district") Is Nothing Then

In asp.net, though, it gives me a 'System.NullReferenceException: Object
reference not set to an instance of an object.'

Why is that?

Looking at MSDN, my syntax seems OK:

http://msdn.microsoft.com/library/de...Cookies101.asp

-Darrel

[Craig Deelsnyder]

On Fri, 26 Aug 2005 13:58:45 -0500, darrel <no*****@hotmail.com> wrote:

in ASP, this seems to work to see if a cookie exists:

If Request.Cookies("site")("district") Is Nothing Then

In asp.net, though, it gives me a 'System.NullReferenceException: Object
reference not set to an instance of an object.'

Why is that?

Looking at MSDN, my syntax seems OK:

http://msdn.microsoft.com/library/de...Cookies101.asp

-Darrel

That's because the .Cookies collection returns null/Nothing if the cookie
with the given name is not found (in this case Request.Cookies("site") is
nothing). So when the portion after that tries to call a property to get
the value, it's a null reference exception.

Check if Request.Cookies("site") is nothing first (remove the district
portion from this line of code)...then you can check the value inside that
if statement....

--
craig
Microsoft MVP - ASP/ASP.NET

[darrel]

> That's because the .Cookies collection returns null/Nothing if the cookie

with the given name is not found (in this case Request.Cookies("site") is
nothing). So when the portion after that tries to call a property to get
the value, it's a null reference exception.

Check if Request.Cookies("site") is nothing first (remove the district
portion from this line of code)...then you can check the value inside that
if statement....

aha! OK, that makes sense. And works! THanks!

-DArrel