Yet another Browser Back question

[zdrakec]

Hello all:

I note in my application, that when I use
Server.Transfer ("somepage.aspx "), when the new page is loaded, and I
click the Back button on the browser, that the previous page, when it
displays, does not appear to have its Page_Load event fire. Neither
does the page which I am leaving have its Page_Unload event fire.

Additionally, there is a listbox on the first page that is populated
based on user-selected values. This listbox, populated at
Server.Transfer time, is blank upon using the browser's Back button.

a) Why does Page_Load not fire upon return to first page when the back
button is pushed?
b) Why is my listbox depopulated?

Thanks much,
zdrakec

[london calling]

Hi zdrakec, when you click the back button your browser is displaying locally
cached content and no call to the server is made. You could try to get around
it by setting a caching expiry date (in the past) or forcing _your_ browser
to always load afresh though this will not work for any one who hasnt also
got their browser set the same way HTH jd

"zdrakec" wrote:

Hello all:

I note in my application, that when I use
Server.Transfer ("somepage.aspx "), when the new page is loaded, and I
click the Back button on the browser, that the previous page, when it
displays, does not appear to have its Page_Load event fire. Neither
does the page which I am leaving have its Page_Unload event fire.

Additionally, there is a listbox on the first page that is populated
based on user-selected values. This listbox, populated at
Server.Transfer time, is blank upon using the browser's Back button.

a) Why does Page_Load not fire upon return to first page when the back
button is pushed?
b) Why is my listbox depopulated?

Thanks much,
zdrakec

[zdrakec]

Thank you london, can you describe precisely how one sets the caching
expiration date?

Thanks again,

zdrakec

[london calling]

Hello again, look at the response.cache object in particular:
Response.Cache. SetCacheability (HttpCacheabili ty.*)

Response.Cache. SetExpires(myDa te)

HTH jd

"zdrakec" wrote:

Thank you london, can you describe precisely how one sets the caching
expiration date?

Thanks again,

zdrakec

[zdrakec]

Thanks again london, please forgive me if I'm being a bit dense, but
I'm not sure WHERE to set this...in the second page's load event, or in
the same procedure that executes Server.Transfer ?

Cheers,

zdrakec

[Joerg Jooss]

zdrakec wrote:

Thanks again london, please forgive me if I'm being a bit dense, but
I'm not sure WHERE to set this...in the second page's load event, or
in the same procedure that executes Server.Transfer ?

Cheers,

zdrakec

You set it in the page or code-behind class that produces the
HttpResponse, i.e. the actual output received by the client.

Cheers
--
http://www.joergjooss.de
mailto:ne****** **@joergjooss.d e

[zdrakec]

Thank you sir!

[Sreejith Ram]

private void Page_Load(objec t sender, System.EventArg s e)
{
ExpirePageCache ();
//.......rest of the page_load logic.......... ..........
}
/// <summary>
/// This function prevent the page being retrieved from broswer cache
/// </summary>
private void ExpirePageCache ()
{
Response.Cache. SetCacheability (HttpCacheabili ty.NoCache);
Response.Cache. SetExpires(Date Time.Now-new TimeSpan(1,0,0) );
Response.Cache. SetLastModified (DateTime.Now);
Response.Cache. SetAllowRespons eInBrowserHisto ry(false);
}
"zdrakec" wrote:

Thanks again london, please forgive me if I'm being a bit dense, but
I'm not sure WHERE to set this...in the second page's load event, or in
the same procedure that executes Server.Transfer ?

Cheers,

zdrakec