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How do you disable caching on Modal dialogs in IE?

Answer 1

+3 A:

Add a timestamp querystring variable to the URL of the dialog content - number of ticks since 1/1/08 or something - IE will treat it as a new page and ignore the cache.

Greg Hurlman 2008-12-01 12:17:48

Answer 2

+2 A:

Place Fiddler in between the IE and your server. Then check if the response to your request carries a HTTP header Cache-Control. Is there some value given other than no-cache ? If so then maybe IE will give this header priority over your http-equiv directive.

If not, you should try to make the server send the HTTP header Cache-Control:no-cache. If IE does not respect this, it's a bug in IE. Experience shows it's less painfull to opt for a different solution than to press for a bugfix, so in this case I'd agree to the tip of Greg.

mkoeller 2008-12-01 13:53:01

Answer 3

+2 A:

Given that the http-equiv directives don’t work (and arguably shouldn’t be used), and despite it unfortunately being in the hack category of solutions, I think we are going to have to go with this (posted by Greg)...

url = "<Some url with query string>"
var date = new Date();
window.showModalDialog(url + “&” + date.getTime(), ... );

It is strange that there is no definitive way to disable caching on these modal dialogs. I’m not sure whether using modal dialogs in web browsers is accepted as a "good idea" or not, but we are aware of at least some of the shortcomings and alternatives, but are just unfortunately unable to use them in this project.

Thanks for your suggestions.

Andy McCluggage 2008-12-02 09:26:28

Indeed it is somewhat hacky, but I think the roots of the problem are a caching bug in IE (I've lost count how many times IE has cached something when I told it not to).

Greg Hurlman 2008-12-02 15:19:12

Answer 4

A:

One of the strange quirks of IE is that setting no-cache at the beginning of the file doesn't seem to work, but moving that section to after the original HTML often does. Still best to send it as an HTTP header, but the following will work in most cases:

<html>
   <head><title>Blah</title></head>
   <body>Contents</body>
</html>
<html>
   <head>
      <meta http-equiv="Cache-Control" content="no-cache" />
      <meta http-equiv="Pragma" content="no-cache" />
      <meta http-equiv="Expires" content="-1" />
   </head>
</html>

2009-01-07 16:46:27

Answer 5

A:

thanks

window.showModalDialog(url + “&” + date.getTime(), ... );

worked

2009-08-04 04:34:33

Answer 6

A:

To clear cache add this in page load

Response.Cache.SetCacheability(HttpCacheability.NoCache);

Regards

F. Dobon 2010-02-26 16:04:08

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How do you disable caching on Modal dialogs in IE?

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