Question

I am going to be using Session["firmaid"] quite alot in my application. This value is set when someone logs in to my system.

If something happens, and this value is lost from the Session, i would like to somehow have a global method that will get it, if it throws a NullReferenceException.

How can i do this?

Currently, my solution is to try and catch every time i use Session["firmaid"], then execute the method that will put firmaid in the Session, if it throws an Exception.

Is there an easier way to do this?

Answer 1

Instead of try/catching everytime you could wrap the access to the session in a strongly typed class and then access the session through this wrapper.

Or even write an extension method:

public static class SessionExtensions
{
    public static string GetFirmaId(this HttpSessionStateBase session)
    {
        var firmaid = session["firmaid"] as string;
        if (string.IsNullOrEmpty(firmaid))
        {
            // TODO: call some method, take respective actions
        }      
        return firmaid;
    }
}

and then in your code instead of:

try
{
    var firmaid = Session["firmaid"];
    // TODO: do something with the result
}
catch (Exception ex)
{
    // TODO: call some method, take respective actions
}

use:

var firmaid = Session.GetFirmaId();
// TODO: do something with the result