http listener

hi, i'm building a web ui for a project that uses grasshopper (and a few other tools)

and I want to be able to send data from the server to grasshopper

iv'e built a web client using C# in grasshopper(it asks for get requests for data-in and post request at the end of the loop for data back to the server)

because only the client can initiate a request I let it checks for new info every few seconds

my main issue is that every few seconds the whole canvas is expired even if there's no new data

how can i make it expire only when new data is entered?

can i automate a data dam?

can i control sliders from c#? without getting expiration messages?

maybe i can use them as memory and because they are earlier in the chain the automated script won't expire them until they change...

maybe someone can give a better solution i'm open for suggestion