cookie in asp.net site

[d2007]

A page on my asp.net website is being accessed via a re-direct from another site/domain.

That calling site/domain has already set a client cookie.

I have been asked to remove that cookie if it exists when the user completes a purchase on my site.

I know how to modify a cookie that is set by my site.

How can I expire this cookie being set before the re-direct?

I have been advised the cookie has been created to allow modification.

Thanks in advance.

 

[jbenson001]

Answer: you can't.

A cookie is specific to the site(domain) it is created in regardless of the cookie being allowed to be modified.

If you google you might find some other info, I found this, but not sure it will help:

http://trainofthoughts.org/blog/2007/04/14/cross-site-cookies/

 

[d2007]

Thanks for the reply.

What about if I am hosting the site on a sub-domain of the calling site.

Example:

Cookie is set (server A):
parts.auto.com

I want to expire cookie from (server B):
purchase.parts.auto.com

 

[jbenson001]

I'm not exactly sure, I still think the domain or sub domain will be the controller. I have never tried that before. Give it a shot and see if it can be done.