You can simply use switch case. Or its better if you can share your both the queries.

check the timeout value of sessionstate in your web.config. May be you have given very less. Session variable doesn't depend on try catch. Its only used to handle errors. In addition sessions will not work locally or on the server unless you are running https (note the S on the end of https), if you have the following in your web.config file:

check the timeout value of sessionstate in your web.config. May be you have given very less. Session variable doesn't depend on try catch. Its only used to handle errors.

instead of önserverclick use onclick and still if it doesn't work then put everything under

The best practice is to store role in db but you can also store in dictionary