How to expire asp pages so the back button will not work?

[jamie79]

I am creating an online test and need to not allow students to be able to use the navagational back button on the browser. I trying to use either a session or a response.expires property but its not working. Help?

 

[yesti]

Try:

<%
Response.AddHeader &quot;Pragma&quot;, &quot;no-cache&quot;
Response.AddHeader &quot;cache-control&quot;, &quot;no-store&quot;
%>

before any html code. I use this to clear a form so after it gets submitted, the user cannot go back and submit it over and over again.