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Answer 1

A:

Have you tried Response.SetExpires()? This is a little simpler than setting the mod date and max age - maybe your browser will like it better.

Ray 2009-11-18 23:53:40

Unfortunately Response.Cache.SetExpires(...) was unsuccessful. The browser is still requesting the file.

Ken Mason 2009-11-19 00:11:18

Is the ETag string the same every time? Have you tried it without the ETag (using only SetExpires() or your original code)?

Ray 2009-11-19 00:37:37

Have you tried inspecting the headers sent by your server for the first request? Does it contain an expires header?

Salman A 2009-11-19 07:47:05

Yes, I made sure the ETag was the same every time, and it still refused to cache it. I also tried using only SetExpires(), and that was ineffective.Yes, the response headers fro the first request contained the expired header as expected when using the SetExpires() method. The headers all seem to be in order.

Ken Mason 2009-11-19 17:16:58

Is the Request URI completely unchanged on every request? Is it always the same domain?

Pekka 2009-11-20 00:38:15

Yesm and yes. The URI is identical with every request, including the FQDN.

Ken Mason 2009-11-20 17:26:43

Answer 2

+1 A:

How about caching the .aspx page that is acting as a css file using something like this:

<%@ OutputCache Duration="60" Location="Client" VaryByParam="None" %>

How to cache in ASP.NET by using Visual C# .NET

Bertine 2009-11-19 20:18:51

Thanks, I had not seen that link. Unfortunately that didn't work either. That's what I expected, since the OutputCache tag ultimately amounts to calls to Response.Cache.*(), which is what I've already been trying.

Ken Mason 2009-11-19 21:42:53

Answer 3

+1 A:

Did you try your caching settings (and result) on a regular HTML page? I mean, are you sure it's a CSS issue, rather than a regular HTML page?

Ron Klein 2009-11-25 18:22:37

Answer 4

A:

edit: Didn't realize this was such an old question, hopefully this still helps someone out there.

Can you pass a bogus, randomly generated querystring to force the recache?

For example:

<link href="<%=sStyleSheet%>" type="text/css" rel="stylesheet" />

and then something like this in your codebehind

Random random = new Random();
int num = random.Next(100000);
string sStyleSheet = "/style.aspx?q=" + num.ToString();

JN Web 2010-05-21 14:02:03

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caching trouble: dynamic css files

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