I want to disable page caching so that when a user presses the browser's back
button after submitting a form, he won't be able to re-edit the form.

How can I do that?

Thanks in advance.

JessyEzzy wrote:

Short answer: You can't. Caching and backward navigation are
conceptually unrelated, as far as the HTTP spec is concerned.

Long answer: Many Browsers actually *do* apply caching instructions to
back/forward navigation. The standard way of disabling caching is
either to set the OutputCache directive on your page(s)

<%@ OutputCache Location="None" %>

or to set the Cache property of the HttpResponse in your code file:

Response.Cache.SetCacheability(HttpCacheability.No Cache);

(which is equivalent to the directive shown above).


Cheers,
--
http://www.joergjooss.de
mailto:news-reply (AT) joergjooss (DOT) de

Would you please tell me what's the difference between
<%@ OutputCache Location="None" %>
And
<%@ OutputCache Duration="0" VaryByParam="none" %>

JessyEzzy wrote:

That disables caching by setting
Cache-Control: no-cache
Pragma: no-cache
Expires: -1

That's not allowed, because Duration must be greater than zero (at
least in ASP.NET 2.0). Assuming Duration is a positive integer <n>,
this sets

Cache-Control: public, max-age=<n>
Expires: <Date header value> + <n>

Thus, the page is publicly cacheable for <n> seconds.

Cheers,

--
http://www.joergjooss.de
mailto:news-reply (AT) joergjooss (DOT) de