Secure Login Or Login check in asp.net

Question

I am new in asp, here my question is that i have a website with pages home, about, contact, and login. In this website user can login and then access the home page, on home page there is a grid view with master page. The problem is that user can access the home page without login, just edit the path in address bar. For example the login page path is

http://lolhost:54515/mastergridvie/Login.aspx

and user edit it

http://localhost:54515/mastergridvie/Home.aspx

so user can go on home page without login, How I can prevent this?

I know for this there use a session, but I have no idea how to and where create a session for this :( Please can anyone help me?

Answer 1

Create Session in login page like this.

Session["userid"]="something";

And After That Check in Every Page Load like This.

if(Session["userid"] == null)
{
  Response.Redirect("Login.aspx");
}