How can I manually clear ASP.NET server cache related to a give application/web site like what can be done on IE to clear browser cache for a give domain? BTW, I am using II7.
View 2 RepliesHow do I force a control+F5 (deleting cache) when updating an application? The users will not do this so I need to force this. Can we use some kind of flush method checking version or...?
View 1 RepliesI would like to reset/clear an item in the Cache, but without resetting the application or writing a specialized page just for this. ie, a non-programmatic solution.
View 3 RepliesI have a asp.net web application and I'm using cache (HttpRuntime.Cache) to save some stuff from db.
I also update db from time to time so that data in db does not match the data in my application's cache.
Is there any way how to clear my application's cache without modifying any source code or republishing the page?
I tried to restart IIS and to clear browsers cache
I'm using an outside page to update an image in my system. When I'm redirected back to the page I've worked in, I still see the old picture. I don't see my changes until I press ctrl+f5.
View 2 RepliesI have a class that is creating an instance of StreamReader to an xml file on the local filesystem.
It may be possible that this same file is requested multiple times per-second.
I was wondering whether I need to manually add this file to the System.Web.Cache and read it from there, or whether Windows itself is clever enough to cache the item itself so that it 'knows' when ASP.NET requests this file the second/third etc time that it doesnt have to do a disk seek/read operation and pulls it from its own cache?
This article: http://dotnetperls.com/file-read-benchmarks seems to back this up, but this: article:
[URL](although not discussing from a performance perspective, and maybe for other reasons entirely) lists how to add a physical file to the cache.
On our website we use standard asp cache with duration set to 5h.
It works fine, but sometimes the publisher add some special content that need to be showed impatiently on many different sub-pages (example some promoted article).
That's what I need to do it's easy to use page like this:
[URL]
I want to clear SERVER SIDE CACHE.
In my site i m redirecting to login page when i m clicking on loguot button. before that i have written follwing code for clearing cache/history-
Session.Clear();
Session.Abandon();
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Cache.SetExpires(DateTime.Now.AddSeconds(-1));
Response.Cache.SetNoStore();
but when i m pasting previous page url in address bar then it is showing that page. i dont want to show that page.
In my aplication (ASP.NET + c# ) when user goes to a aspx page , I need to clear cache first.
Does anyone have any idea how can I progrmaticaly make clear cache on an aspx page, or in it's code behind (c#)?
I created a custom 404 page and set its output cache duration to 7200 seconds (the pages themselves aren't updated more than twice a day, so I figured this was reasonable).
I ran into an error on the live side of things when I uploaded it, and I'm trying to debug and solve it. The problem is that I can't seem to figure out how to get rid of the cache itself, which definitely appears to be getting in the way. The reason I say that relates to my stack trace:
Server Error in '/' Application.
Input string was not in a correct format.
Description:
An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code. Exception Details: System.FormatException: Input string was not in a correct format.
Source Error:
[Code]....
Stack Trace:
[Code]....
I've been trying to debug the ExtractURLComponents sub, and even commented out every line in it.
[Code]....
I'm still getting an error, even with every line of the sub commented out. So this is why I'm thinking it's got something to do with the cache. I tried clearing it with a different page using this:
[Code]....
I'm not sure if there's anything I'm supposed to do to clear the cache.
My web client requires client-side output caching since it makes use of its own Back and Forward buttons (which basically just call the browser back/forward buttons).
The issue I'm having, however, is (of course) when the user signs out of the app. The client-side output cache remains so anyone can click the "back" button and it appears to be signed in again. I've researched a few solutions, but most involve server-side output caching or no output caching at all.
I've had success with server caching and HttpResponse.RemoveOutputCacheItem, but unfortunately I need the client side caching.
Is it at all possible to clear this client side output cache upon logging out?
I have various caches on my compiled website. However, I need to clear all these caches. Is there a way of doing this (without having to restart the server!)?
View 1 RepliesI am inserting and updating the image from html file upload to my gridview / insertion goes fine , but when i update the image by clicking on edit using onselectedindexchanged event of gridview, I fetch the image then change it with other image, with this simultaneously i rebind the gridview, in the beck-end everything goes fine it updates and replaces the image but in gridview it won't show after updated. I am using postbacktrigger on my submit button, but gridview won't refreshes, until and unless i click on address bar and press ENTER , or until i won't press CTRL+F5 to clear the browser cache.
View 1 RepliesI have a page that deploys a user control to display an article. The page will show a different article depending on the ID parameter fed in via querystring, and there are many thousands of articles in our db. Here is the problem: I need to cache the user control to improve performance. But editors constantly need to go in and make changes/corrections, which they want to appear instantly on the site. Is it possible to clear the cache for a specific article only once it has been edited? ie for the request article.aspx?id=123? If so how would I do this? Otherwise, if the cache is cleared for all our content every time a single piece of content is edited, it will defeat the object of caching in the first place. I have tried using a cache key as recommended here: [URL] However, this apporach suffers from the drawback mentioned above. have also seen that you can set caching up to be cleared by changes to the db. However, the particular table concerned holds content for a number of other sites and would also have the same disadvantage.
View 5 RepliesI am having a probem when logout from my website.When i copy the URL page which is the page after login,and paste it again in browser,i can direct it to the page even though i alr logout. I not using any buit in asp control,and the logout button link that i create is place at Master Page.
View 1 Replieswhen i first run my applcation some time its showing the data from cache.i want to avoid it in first time .
i want to cache my all images/css/js file what is the efficient way to do it.
i have lot of images folder /js /css files.
I have an content page that got
<%@ OutputCache Duration="600" VaryByParam="*" %>
Now i want to display a link on the same content page that actually clear the cache.
[Code]....
But its just not working, What i am doing wrong here?
I'm developing a server control and I'd like to set some cache and application level variables but I don't want them to be visible from outside the control. Is this possible?
View 1 RepliesI have a server control that I developed which generates navigation based on a third party CMS API. Currently I am caching this control using the PartialCaching attribute. The CMS uses cache key dependencies to invalidate the cache when a user makes an edit, however in the case of my server control it does not get invalidated and the updated navigation will not show up until the cache expiration set by the PartialCaching attribute.Here is my two part question:
What is the proper way to programmatically cache a server control, without using the PartialCaching attribute, and adding a cache key dependency?
Is it possible to continue to use the PartialCaching attribute and add a cache key dependency?
I have a website that i did some time ago now they request some new features and i did some changes in some javascript files, but when i publish the clients that use the IE have problems with cache so in they browser they have old version of javascript. How can i clear the client cache so when they visit website they use latest javascript files that i modify.
View 1 RepliesIm building a image gallery which reads file from disk, create thumbnails on the fly and present them to the user. This works good, except the processing takes a bit time.
I then decided to cache the processed images using the ASP .NET Application Cache. When a image is processed I add the byte[] stream to the cache. As far as I know this is beeing saved into the system memory. And this is working perfect, the loading of the page is much faster.
My question is if there are thousands of images which gets cached in the Application Cache, will that affect the server performance in any way?
I have the following .NET VB code to set and read objects in cache on a per user basis (i.e. a bit like session)
'' Public Shared Sub CacheSet(ByVal Key As String, ByVal Value As Object)
Dim userID As String = HttpContext.Current.User.Identity.Name
HttpContext.Current.Cache(Key & "_" & userID) = Value
End Sub
Public Shared Function CacheGet(ByVal Key As Object)
Dim returnData As Object = Nothing
Dim userID As String = HttpContext.Current.User.Identity.Name
returnData = HttpContext.Current.Cache(Key & "_" & userID)
Return returnData
End Function
I use these functions to hold user data that I don't want to access the DB for all the time. However, when the data is updated, I want the cached item to be removed so it get created again.
How do I make an Item I set disappear or set it to NOTHING or NULL?
I've got a web application that runs of a state server. It looks like soon it may need to distributed and there will be two web servers behind a load balancer.
This works great for session state but my next challenge is Cache
My application leverages heavily of cache. I understand ASP.Net 4.0 will be offering more here but nothing much has been said about the how too.
There are two challenges that I face
1). Each webserver will have its own copy of cache whereas it would be more efficient to put this to a third server the same as session state is put to state server.
2). The real challenge is keeping cache in sync if a simple dataset derived from the database is changed my code dumps that cache item and reloads the cache. That's all well on one webserver but webserver number two wont know to drop that particular cache item and reload it. This could cause some unexpected problems in the application.
For scenario number 2 I could attempt to do some smart coding so server number two knows to dump the cache and reload it.
My guess is someone else has already been here before and there's probably a better implementation approach rather than writing extra code.
Does anyone know how I could achieve the goal of keeping Cache in sync between multiple webservers or even better farm Cache management to another server?
I am wondering if it is possible to clear a session variable if the user navigates away from my site.
My example is I have a session storing the logged in user. This is checked for user access to each page.
If the user goes to another site (e.g. google) I want them to relog into the site.
This is to prevent others getting access to a users account if they use the same pc minutes.
I do have a logout that performs this and I know that it is impossible to make users use it! :)
I'm working on a public site that soon will not longer be 100% public. Paid users will be able to access 100% of the features while "anonymous" users will access a reduced version. The problem is that anonymous users and paid users will access the same pages, but they'll see different things. I wonder about how to keep using cache for all pages. I have to 100% sure that I show the correct content for each type of user. Will be extremely bad to show a cached version of the paid site to an anonymous user (and the other way around). Preferably, without adding anything to the url to differentiate user type.
View 2 Replies