Force image refresh

[Marco Maroni]

How to force image refresh on client browser ? Is ti possible to force the
refresh of the same image (tha was changed server-side) to the client,
without user press Contrl+F5 in IE ?

-
Marco

[Ray Dixon [MVP]]

Hi Marco,

There's not really a way to have the server tell the client to refresh the
page. However, the server can send information that tells the client to
refresh the page at a specific interval. There are a couple of ways to do
this. One way is to add a META tag to in the HEAD of the HTML sent to the
client. For instance, if you want the entire page to refresh every 2
seconds, you could add the following tag to inside the HEAD element:

<META HTTP-EQUIV="REFRESH" CONTENT=2>

You can also use client-side script to force a refresh. You could use a
combination of window.setInterval() and location.reload() to periodically
refresh the page.

window.setInterval:
[url]http://msdn.microsoft.com/library/default.asp?url=/workshop/author/dhtml/reference/methods/setinterval.asp[/url]
location.reload:
[url]http://msdn.microsoft.com/library/default.asp?url=/workshop/author/dhtml/reference/methods/reload.asp[/url]

If you wanted to refresh the page only when the image is updated, I would
pursue perhaps having a hidden frame with a page that periodically checks to
see if the image has been updated since the last time it was loaded, then
refresh the entire page if it has.

Good luck!


--
Ray Dixon - Microsoft MVP
[email]ray@NOSPAM.greeble.com[/email]
(remove NOSPAM. from my e-mail address for a direct reply)



"Marco Maroni" <mmaroni@yahoo.com> wrote in message
news:OGX1pZ6TDHA.1552@TK2MSFTNGP12.phx.gbl...

> How to force image refresh on client browser ? Is ti possible to force the
> refresh of the same image (tha was changed server-side) to the client,
> without user press Contrl+F5 in IE ?
>
> -
> Marco
>
>