Adding OutputCache to an ASP.NET WebForm crashes my site :(

Posted by Pure.Krome on Stack Overflow See other posts from Stack Overflow or by Pure.Krome
Published on 2010-03-29T07:37:02Z Indexed on 2010/03/29 10:53 UTC
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Hi folks,

When I add either one of these ...

<%@ OutputCache Duration="600" Location="Any" VaryByParam="*" %>

or

<%@ OutputCache CacheProfile="CmsArticlesListOrItem" %>

(.. and this into the web.config file...)
<caching>
    <outputCacheSettings>
        <outputCacheProfiles>
            <add name="CmsArticlesListOrItem" duration="600" varyByParam="*" />
         </outputCacheProfiles>
    </outputCacheSettings>

    <sqlCacheDependency ........ ></sqlCacheDependency
</caching>

my page/site crashes with the following error:-

Source: System.Web
----------------------------------------------------------------------------
TargetSite: System.Web.DirectoryMonitor FindDirectoryMonitor(System.String, Boolean, Boolean)
----------------------------------------------------------------------------
Message:System.Web.HttpException: Directory 'C:\Web Sites\My Site Foo - Main Site\Controls\InfoAdvice' does not exist. Failed to start monitoring file changes.
   at System.Web.FileChangesMonitor.FindDirectoryMonitor(String dir, Boolean addIfNotFound, Boolean throwOnError)
   at System.Web.FileChangesMonitor.StartMonitoringPath(String alias, FileChangeEventHandler callback, FileAttributesData& fad)
   at System.Web.Caching.CacheDependency.Init(Boolean isPublic, String[] filenamesArg, String[] cachekeysArg, CacheDependency dependency, DateTime utcStart)
   at System.Web.Caching.CacheDependency..ctor(Int32 dummy, String[] filenames, DateTime utcStart)
   at System.Web.Hosting.MapPathBasedVirtualPathProvider.GetCacheDependency(String virtualPath, IEnumerable virtualPathDependencies, DateTime utcStart)
   at System.Web.ResponseDependencyList.CreateCacheDependency(CacheDependencyType dependencyType, CacheDependency dependency)
   at System.Web.HttpResponse.CreateCacheDependencyForResponse(CacheDependency dependencyVary)
   at System.Web.Caching.OutputCacheModule.InsertResponse(HttpResponse response, HttpContext context, String keyRawResponse, HttpCachePolicySettings settings, CachedVary cachedVary, CachedRawResponse memoryRawResponse)
   at System.Web.Caching.OutputCacheModule.OnLeave(Object source, EventArgs eventArgs)
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Ok .. so for some reason, the OutputCache wants a folder/file to be there? Well, i've had this site live for around 3 years and i'm pretty sure that the folders \Controls and \Controls\InfoAdvice doesn't exist on my production server. On my localhost, it sure does .. and contains a large list of ascx controls.

But they don't exist on my live server.

So ... what is going on here?

Can anyone please help?

Oh :) Before someone suggests I create those two folders and even stick a random file in those folders .. and have some random text in those random files .. i've done that and it doesn't seem to work, still :(

Please Help !

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