Creating a Log Out Option

If you're using Forms Authentication in a LightSwitch browser application, you might like to add a Log Out button, so that the current user can log out, allowing another user to log in instead. In a desktop application, you'd simply close it, using the Windows-provided Close button. But even if you close a LightSwitch browser application, the session cookie for your application (also known as the authentication cookie) will still remain. When you open the application again, it won't prompt the user for a username and password, unless enough time has passed for the cookie to have expired.

To force the application to ask for new user credentials, we'll use a technique based on an article that was created by the LightSwitch team. This creates a special ASPX file that logs out the user and redirects the browser back to the default htm page. When the application reloads, the LightSwitch login screen will be displayed to the user.