Now I am using Form authentication for my website.
It is something like that below. But if I left the website without using it for quite some time and when I used it back, it is redirected to the login page.
The one I want to know is that it is because of session expire or cookies expire. And if it is session expired, I want to show the alert box and redirect to the login page. And one more thing is that if the user keeps on using the website, I want to extend the session expire time. If you do not mind, I want to have some references for this scenario. Thank you so much.
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