Disabling page caching not working

Hi All,

Can anyone please explain me why I am not able to disable Browser caching in
ASP.net by writing the following code

Response.Buffer = true;
Response.ExpiresAbsolute = DateTime.Now.Subtract(new TimeSpan(1, 0,
0, 0));
Response.Expires = 0;
Response.CacheControl = "no-cache";

To test if it is working, I wrote the above code in the page load event
handler of a ASPX page called Page1.aspx. I added a Button with a click event
handler which posts the page to a second page Page2.aspx. Now when I press
back button on the browswer while in Page2.aspx, I get page1.aspx. I should
be getting page expired error page, but what I have observed is that whenever
i press back button on the browswer, page1.aspx is freshly loaded (I put
break on page_load event handler to find this out).

I also tried to write this code in the page_load event of Page1.aspx instead
of the four lines of code

Page.Response.Cache.SetCacheability(HttpCacheability.NoCache );

The above code is also not working. I am using IE 7.0.

thanks
pradeep

Re: Disabling page caching not working

I'm not sure I understand why you expect a "page expired" message. If
caching is disabled, the page would simply be re-requested by the browser,
exactly as you describe...
Peter

"pradeep_TP" wrote in message
news:BF0412EB-BABA-4075-993D-2B88A5FC04E3@microsoft.com...
> Hi All,
>
> Can anyone please explain me why I am not able to disable Browser caching
> in
> ASP.net by writing the following code
>
> Response.Buffer = true;
> Response.ExpiresAbsolute = DateTime.Now.Subtract(new TimeSpan(1, 0,
> 0, 0));
> Response.Expires = 0;
> Response.CacheControl = "no-cache";
>
> To test if it is working, I wrote the above code in the page load event
> handler of a ASPX page called Page1.aspx. I added a Button with a click
> event
> handler which posts the page to a second page Page2.aspx. Now when I press
> back button on the browswer while in Page2.aspx, I get page1.aspx. I
> should
> be getting page expired error page, but what I have observed is that
> whenever
> i press back button on the browswer, page1.aspx is freshly loaded (I put
> break on page_load event handler to find this out).
>
> I also tried to write this code in the page_load event of Page1.aspx
> instead
> of the four lines of code
>
> Page.Response.Cache.SetCacheability(HttpCacheability.NoCache );
>
> The above code is also not working. I am using IE 7.0.
>
> thanks
> pradeep
>

Re: Disabling page caching not working

I do not want to show the previous page when the user clicks on the back
button on the browswer. All I want it that when the back button is pressed,
the standard "page expired" page should be shown.

You are right, now I understand that if I disable the page caching, the page
would be requested from the server. But how would i make the browser show
only the page expired message ?

thanks
pradeep

"Peter Bromberg [C# MVP]" wrote:

> I'm not sure I understand why you expect a "page expired" message. If
> caching is disabled, the page would simply be re-requested by the browser,
> exactly as you describe...
> Peter
>
> "pradeep_TP" wrote in message
> news:BF0412EB-BABA-4075-993D-2B88A5FC04E3@microsoft.com...
> > Hi All,
> >
> > Can anyone please explain me why I am not able to disable Browser caching
> > in
> > ASP.net by writing the following code
> >
> > Response.Buffer = true;
> > Response.ExpiresAbsolute = DateTime.Now.Subtract(new TimeSpan(1, 0,
> > 0, 0));
> > Response.Expires = 0;
> > Response.CacheControl = "no-cache";
> >
> > To test if it is working, I wrote the above code in the page load event
> > handler of a ASPX page called Page1.aspx. I added a Button with a click
> > event
> > handler which posts the page to a second page Page2.aspx. Now when I press
> > back button on the browswer while in Page2.aspx, I get page1.aspx. I
> > should
> > be getting page expired error page, but what I have observed is that
> > whenever
> > i press back button on the browswer, page1.aspx is freshly loaded (I put
> > break on page_load event handler to find this out).
> >
> > I also tried to write this code in the page_load event of Page1.aspx
> > instead
> > of the four lines of code
> >
> > Page.Response.Cache.SetCacheability(HttpCacheability.NoCache );
> >
> > The above code is also not working. I am using IE 7.0.
> >
> > thanks
> > pradeep
> >
>