Question

I want to use my code behind (C#) to check and see if a user is logged in or not on page load. I assume this is really basic, but I’m still new to .net

This is basically what I want:

if(loggedIn == true){ do something }

Answer 1

If you are using the built in .net Forms Authentication, then you can use the following

if ( HttpContext.Current.User.Identity.IsAuthenticated){
     do something
}

Make sure you have your settings in the web.config set up for using FormsAuthentication