How to replace HTTP header, change Accept-Encoding to change User-agent in asp.net?

Question

I’m developing mobile, smartphones, websites with the same dynamic content, I can’t install a different user agent. The default value is Accept-Encoding. How can we replace the different: Accept-Encoding vary: User-agent?

I tried all these

1. <% @OutputCache Duration = "180" VaryByHeader = "User-Agent"%>

2.HttpContext.Current.Response.AddHeader ("Vary", "User-Agent");

3.HttpContext.Current.Items.Add ("Vary", "User-Agent");

4.HttpContext.Current.Response.Cache.SetVaryByCustom ("User-Agent");

5.HttpContext.Current.Response.Cache.VaryByHeaders.UserAgent = true;

6.HttpContext.Current.Response.Headers.Set ("Vary", "User-Agent");

but still arriving

Cache-Control: public, max-age = 180 Content-Encoding: GZIP Content-Length: 9741 Content-Type: Text / html; Encoding = ISO-8859-1 Date: Tue, 23 Jul. 2013 12:19:23 GMT Expires: Tue, Jul 23. 2013 12:22:22 GMT Last change: Tue, Jul 23. 2013 12:19:22 GMT Server: Microsoft-IIS / 7.5 Vary: Accept-Encoding

where i want

Cache-Control: public, max-age = 180 Content-Encoding: GZIP Content-Length: 9741 Content-Type: Text / html; Encoding = ISO-8859-1 Date: Tue, 23 Jul. 2013 12:19:23 GMT Expires: Tue, Jul 23. 2013 12:22:22 GMT Last change: Tue, Jul 23. 2013 12:19:22 GMT Server: Microsoft-IIS / 7.5 Vary: User-Agent

thanks

Answer 1

"If you want to cache only HTTP header values, you must set the VaryByParam attribute to" None ".

http://msdn.microsoft.com/en-us/library/vstudio/system.web.ui.outputcachelocation%28v=vs.100%29.aspx

http://msdn.microsoft.com/en-us/library/vstudio/a6s4ks5w%28v=vs.85%29.aspx