有什么方法可以在asp.net中设置到期标头，而无需在IIS 6 Configuration Manager中进行更改

Question

I Need To Set Expiry Headers In my Asp.net code.. Is there any way through which I Can Add expiry Headers through code.?

I Have tried adding the following code in my asp page

<% System.Web.HttpContext.Current.Response.AddHeader( "Cache-Control","no-cache"); System.Web.HttpContext.Current.Response.Expires = 0; System.Web.HttpContext.Current.Response.Cache.SetNoStore(); System.Web.HttpContext.Current.Response.AddHeader("Pragma", "no-cache");%>

<%@ OutputCache Duration="86400" Location="Client" VaryByParam="None" %>

and added the following in my c# page...

Response.AddHeader("Expires", "Thu, 01 Dec 2014 16:00:00 GMT");
AND

Response.Cache.SetCacheability(HttpCacheability.Public); Response.Cache.SetMaxAge(TimeSpan.FromSeconds(3600)); Response.Cache.SetExpires(DateTime.UtcNow.AddSeconds(3600));

and added this to web,config file

<clientCache httpExpires="Sun, 29 Mar 2020 00:00:00 GMT" cacheControlMode="UseExpires" />

Answer 1

HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.Public);
HttpContext.Current.Response.Cache.SetExpires(yourCalculatedDateTime);

Answer 2

you can define it per page like below

Response.Cache.SetExpires(DateTime.Now.AddSeconds(60));
Response.Cache.SetCacheability(HttpCacheability.Public);
Response.Cache.SetValidUntilExpires(true);

or you can do it in declaritive way by doing it in your aspx page like below

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