Page 3 OutputCache - General Discussion

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4/15/2007 10:55 PM

John Mitchell

www.snapsis.com
Joined: 4/18/2003

Posts: 3987

Re: OutputCache Modified By John Mitchell on 4/15/2007 10:55:41 PM

You might try the Response.Cache object: http://msdn2.microsoft.com/en-us/library/y18he7cw(VS.71).aspx

Particularly the SetVaryByCustom method: http://msdn2.microsoft.com/en-us/library/system.web.httpcachepolicy.setvarybycustom.aspx

You may also be interested in PageBlaster.Net

4/21/2007 6:53 AM

J.O.

Joined: 3/2/2006

Posts: 223

Re: OutputCache

Thank you for your response. I have read the msdn articles, however I am wondering how I can clear the cache programmatically in an easy way. I have the situation in which data is uploaded periodically to the web. At that time the cache should be removed to show the actual status of the data (like amount in stock). I could programmaticaly run through all querystrings and clear the cache, but that does not seem smart. Other option is to create a dummy file and then remove it. However, this would create a lot of dummy files. Is there not an easier way?

4/21/2007 8:35 AM

John Mitchell

www.snapsis.com
Joined: 4/18/2003

Posts: 3987

Re: OutputCache

You should really look at PageBlaster. It solves all these problems of caching dynamic pages.

You can set an interval on it so that the cache is cleared periodically, or you can manually force a cache refresh on the server just by browsing and refreshing the page with the CTRL key.

6/22/2007 7:36 PM

J.O.

Joined: 3/2/2006

Posts: 223

Re: OutputCache

Hi John,

I studied the cache object. But how to get it into DNN. I would like the current-thread in it so that each page is cached by culture. Also I have a own variable which depends on an anonymous user or on a own discount role when the user is logged in. This parameter is not in the querystring. How do I get them in to the DNN core? I do not know where to find: override string GetVaryByCustomString(HttpContext context, string custom) to implement my own varybycustomstring.

Any help is appreciated.

Jelle

//Response.Cache.SetExpires(DateTime.Now.AddMinutes(5));

//Response.Cache.SetCacheability(HttpCacheability.Public);

//Response.Cache.SetValidUntilExpires(true);

//Response.Cache.SetVaryByCustom(System.Threading.Thread.CurrentThread.CurrentCulture.Name);

// public override string GetVaryByCustomString(HttpContext context, string custom)

//{

// if (string.Compare(custom, "uiCulture", true, System.Globalization.CultureInfo.InvariantCulture) == 0 && System.Threading.Thread.CurrentThread.CurrentUICulture != null)

// {

// return System.Threading.Thread.CurrentThread.CurrentUICulture.Name;

// }

// else

// return base.GetVaryByCustomString(context, custom);

//}

// <%@ OutputCache Duration=86400 VaryByParam=None VaryByCustom="uiCulture" %>

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