When the content of the panel is refreshed. The image is reloaded event
though the browser has it in its cache. Does anyone know how to prevent this
happening ?

<asp:updatepanel id="xxx" runat"=server" >
<contenttemplate>

<img src="myImage.gif" alt="" />


</content ..........

when the panel is updated, all the html inside the panel div is re-rendered.,
so the browser re-fetches the image and displays it. use fiddler to check the
cache headers to see why the cache is not used.

-- bruce (sqlwork.com)


"Rain" wrote:

> When the content of the panel is refreshed. The image is reloaded event
> though the browser has it in its cache. Does anyone know how to prevent this
> happening ?
>
> <asp:updatepanel id="xxx" runat"=server" >
> <contenttemplate>
>
> <img src="myImage.gif" alt="" />
>
>
> </content ..........
>
>
>

Hi Bruce.

Ive never heard of fiddler, I assume its a HTTP Sniffer for which I have
IEWebDeveloper . I have discovered two things since I wrote this.

1.) This is not a problem in IE7. only IE6

2.) using the following code seems to create a cached version in the
document. so that the only time the images are loaded is on the first GET.

myImage = new Image();
myImage.src = "imageURL";

Now I still need to check this in IE6. But if you preload this in the
window.load event, it never has to go back to the server in IE7. I think it
still might be an issue in IE6 but Ill find out tomorrow, if so Ill have to
find another strategy.


Cheers for the help.



"bruce barker" <(E-Mail Removed)> wrote in message
news:478F36F3-8D4B-43C6-B2AD-(E-Mail Removed)...
> when the panel is updated, all the html inside the panel div is
> re-rendered.,
> so the browser re-fetches the image and displays it. use fiddler to check
> the
> cache headers to see why the cache is not used.
>
> -- bruce (sqlwork.com)
>
>
> "Rain" wrote:
>
>> When the content of the panel is refreshed. The image is reloaded event
>> though the browser has it in its cache. Does anyone know how to prevent
>> this
>> happening ?
>>
>> <asp:updatepanel id="xxx" runat"=server" >
>> <contenttemplate>
>>
>> <img src="myImage.gif" alt="" />
>>
>>
>> </content ..........
>>
>>
>>