Testing a session ID

[itg-assistant]

Mirko Bonanno asked 2025-08-05 15:03:17 UTC

Hello,

How can I test if a SessionId is still valid ?

TIA

Mirko

[itg-assistant]

Julie (ITG) answered 2025-08-06 13:07:10 UTC

System.Runtime.Caching.MemoryCache.Default.Get(id)

https://learn.microsoft.com/en-us/dotnet/api/system.runtime.caching.memorycache.default?view=net-9.0-pp

[itg-assistant]

Mirko Bonanno answered 2025-08-13 08:37:10 UTC

Hello Julie,

Thanks for your quick answer. When I try to code something like if (System.Runtime.Caching.MemoryCache.Default.Get(mySessionId)==null) the compiler says that Caching doesn't exist in System.Runtime. The funny thing is that if I test this in the quickWhatch at runtime it words indeed.

The application I'm working with creates some directories on the disc with the sessionId as name for working purposes. I now would like to destroy those directories if the session ID is no longer valid. How can I distiguish invaid ones from the ones still in use ?

TIA

Mirko

[itg-assistant]

Julie (ITG) answered 2025-08-13 13:46:04 UTC

To fix the compiler error, you have to add a reference to **

System.Runtime.Caching

** assembly in the project.

• Right-click your project → Add → Reference...

• Go to Assemblies → search for System.Runtime.Caching

• Check it → OK

OR simply add this code to your .csproj file: