在Facebook身份验证对话框中发布

Question

I am trying to provide login using facebook option to my website users. So, I created one Facebook app .But the auth dialog box is showing only once for a user.That is for the first login the auth dialog box will show .For the next logins the auth dialog box is not showing. I want to show the auth dialog box in each login for each users.

Answer 1

Maybe this explains it?

Logging off your App and Logging in With Another Account

If you log on to your app with Facebook, and then log out and try to log in again with a different Facebook account (using the same browser), you will be immediatly logged in to the previous Facebook acount you used. In order to use another account, you need to navigate to Facebook and log out at Facebook. The same rule applies to any other 3rd party authentication provider. Alternatively, you can log in with another account by using a different browser.

Taken from http://www.asp.net/mvc/tutorials/mvc-5/create-an-aspnet-mvc-5-app-with-facebook-and-google-oauth2-and-openid-sign-on