Passing session data between ASP.NET web applications

Question

I\'m trying to help a friend - they have a pretty big web application (ASP.NET 4.0, Visual Basic) that has a number of subfolders that all act as quasi sub-applications (but the

Answer 1

Eventually I found the solution to this problem and I'm leaving it here as reference to others:

StateServer uses a windows service (ASP.NET State Service) which handles the sessions in memory. This uses the MachineKey, AppDomainAppID as well as the SessionID to uniquely identify an application.

• Set the same MachineKey in web.config to be the same for all applications under the site.
• Add code in Global.asax Init() to set AppDomainAppID to be the same for all applications.
• Implement ISessionIDManager and return custom Session ID to be re-used in the sub-applications.

The following links provided the information to the actual implementation I did:

• Sharing session state over multiple applications
• Maintain the same session ID over multiple applications using state server
• Sharing sessions over applications