CODEWITHSUNDEEP
asp.net-mvcoutputcache
AdrianoRR
AdrianoRR

Reputation: 1131

Clearing outputcache on client side

As the title says, how can i clear Outputcache on client side? I have several ajax calls that needs to be cleared after user does some specific actions.

I tried:

Response.RemoveOutputCacheItem(Url.Action("Action", "Controller"));

But it didn't work.

I even tried to expire it mannually (even though this would be a bad approach):

                Response.Expires = 0;
                Response.ExpiresAbsolute = DateTime.Now.AddMinutes(-1);
                Response.AddHeader("pragma", "no-cache");
                Response.AddHeader("cache-control", "private");
                Response.CacheControl = "no-cache";

That didn't worked out too.

Just to be clear, i'm using OutputcacheLocation = Client. If i set it to Server the examples above work flawlessly.

Upvotes: 3

Views: 1949

Answers (2)

Stefan Steiger
Stefan Steiger

Reputation: 82356

If what you need is the axax call to return different data each time despite caching, when called with the same arguments, the only reliable way is to add another variable in the query string, which is always different, e.g. the time down to the millisecond.

Here's how I do it (parameter no_cache):

<script type="text/javascript">
Date.prototype.getTicksUTC = function() 
{
    return Date.parse(this.toUTCString()) + this.getUTCMilliseconds();
} // End Function getTicksUTC


Date.prototype.getTicksGMT = function() 
{
    return Date.parse(this.toGMTString()) + this.getMilliseconds();
} // End Function getTicksGMT

var strURL= "http://localhost/ajax/whateverhandler.ashx?param1=value1&para2=value2&paraN=valueN&no_cache=" + new Date().getTicksUTC();
alert(strURL);

</script>

Upvotes: 3

David Savage
David Savage

Reputation: 769

You can't. Once you set the cache location to client, you have given the client the responsibility to manage it.

Upvotes: -2

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