I'm creating a site in .NET2.0 that's accessed by a number of resellers. For each reseller I'm holding their details within the profile. The resellers log in to the companies main site and when they follow a link to my site I get sent their unique ID encrypted. From there I can decrypt their ID and populate the profile with the relevant information.
My problem is, how can I automatically log in a user using .NET2 if I've already got their username and password? The process needs to be seemless so I can't use the login control and get them to log in again. I've looked everywhere and can't find any information on this.
Any help would be greatly appreciated.