Is there any other way to disable the caching of the page? cause i have a page where in the background image in a DIV that keep on changing for every refresh. the problem is when a post back is trigger the background image wont refresh bec. it is cache in the browser. I've tried using this commands in server side
Response.ExpiresAbsolute = DateTime.Now.AddDays(-1d);
My Silverlight4 app is hosted in ASP.NET MVC 2 web application. I do web request through HttpWebRequest class but it gives back a result previously cached. How to disable this caching behavior? There are some links which talks about HttpWebRequest in .NET but Silverlight HttpWebrequest is different. add unique dummy query string on every web request, but I'd prefer more elegant solution. I also tried the following, but it didn't work:
_myHttpWebRequest.BeginGetRequestStream(new AsyncCallback(BeginRequest), new Guid());
In fact, by setting browser history settings it is possible to disable caching. See the following link:
[URL] But asking a user to change browser settings is not an option for me.
We have a wfc layer that wraps the business classes and database access and use a client that lives on the database layer. Amongst our group we are attempting to form standards. Some want to have the client call the web method and pass the page they are requesting and the page size. Pass that to the database and then page in SQL Server use RowNum.Some want to cache the full list of objects in http cache on the service tier and page in memory. They concern here is memory use on the server.
Which would be best for a medium number of users with potentially large number of records to manage (say 30K) Is it better to cache them all in memory and work from there or page at the database as the application scales?
I need to enable caching in my asp.net application, but I do not want to use the webserver's memory for holding cache objects. If I add the page directive for output caching will the page be stored in the asp.net cache object?
View 2 RepliesI am using Html.RenderAction<CartController>(c => c.Show()); on my master Page to display the cart for all pages. The problem is when I add an item to the cart and then hit the browser back button. It shows the old cart (from Cache) until I hit the refresh button or navigate to another page.
I've tried this and it works perfectly but it disables the Cache globally for the whole page an for all pages in my site (since this Action method is used on the master page). I need to enable cache for several other partial views (action methods) for performance reasons.
I wouldn't like to use client side script with AJAX to refresh the cart (and login view) on page load - but that's the only solution I can think of right now.
I'd like to pass data from one asp.net page to another. I've seen that using System.Web.Caching.Cache is a good way to accomplish this. I'm wondering if it's a good way to do it and also is there any cleanup or other things I need to keep in mind when you the Cache?
I'm not passing very much, at most two integers.
I have a Web Application where I have one and only one master page and with 100's of diffrent content pages
So to speed up my Web app How can i CACHE the mater oage but not the content page??
Master page loads each time whenever content page is requested..
This thing is possible,I have seen it on many diffrent websites where the Website's Master Page Remains Intact and only the content page changes (best example would be Facebook)
How can i have the same effect in my Web Application?
Is it correct to implement my caching object like this in my controller :
[code]....
And I Use it like this :
[code]....
What are the "optimal" parameters for creating an AppFabric cache when you will be storing session state in the cache? MSDN Cache-Related Commands
Powershell command line:
New-Cache [-CacheName] <String> [-Eviction <String>] [-Expirable <String>] [-Force [<SwitchParameter>]] [-NotificationsEnabled <String>] [-Secondaries <Int32>] [-TimeToLive <Int64>]
[code]...
Since I don't want my sessions to be removed unless the session has been abandoned either via code or Session Timeout...For eviction, I would think "None" and for expireable, I would think False.I have tested and calling Session.Abandon does remove the object from the cache. I have also tested to see if by extending my session, the session object in cache is also extended. This does seem to work the "correct" way.
We have a data driven ASP.NET website which has been written using the standard pattern for data caching (adapted here from MSDN):
public DataTable GetData()
{
string key = "DataTable";
object item = Cache[key] as DataTable;
[code]...
The trouble with this is that the call to GetDataFromSQL() is expensive and the use of the site is fairly high. So every five minutes, when the cache drops, the site becomes very 'sticky' while a lot of requests are waiting for the new data to be retrieved.
What we really want to happen is for the old data to remain current while new data is periodically reloaded in the background. (The fact that someone might therefore see data that is six minutes old isn't a big issue - the data isn't that time sensitive). This is something that I can write myself, but it would be useful to know if any alternative caching engines (I know names like Velocity, memcache) support this kind of scenario. Or am I missing some obvious trick with the standard ASP.NET data cache?
We are using HttpRuntime.Cache API in an ASP.NET to cache data retrieved from a database.
For this particular application, our database queries feature a LOT of parameters, so our cache keys look something like this:
table=table1;param1=somevalue1;param2=somevalue2;param3=somevalue3;param4=somevalue4;param5=somevalue5;param6=somevalue6... etc...
we have so many parameters that the cache key is several hundred characters long. is there a limit to the length of these cache keys? Internally, it is using a dictionary, so theoretically the lookup time should be constant. However, I wonder if we have potential to run into some performance/memory problem.
I have use Nhibernate in my MVC Project by me known, Nhibernate have cache on Session and Object. now, I want use HttpContext.Current.Cache (system.web) for cache data something in project. my code same that have problem, haven't it. and that's right or wrong.
View 2 RepliesI'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 want to be able to maintain certain objects between application restarts.
To do that, I want to write specific cached items out to disk in Global.asax Application_End() function and re-load them back on Application_Start().
I currently have a cache helper class, which uses the following method to return the cached value:
return HttpContext.Current.Cache[key];
Problem: during Application_End(), HttpContext.Current is null since there is no web request (it's an automated cleanup procedure) - therefore, I cannot access .Cache[] to retrieve any of the items to save to disk.
Question: how can I access the cache items during Application_End()?
Im 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 a web form where most of the aspx markup never changes. Only a few controls change from time to time. As I have read through some articles it seems I have to create a custom control to enable partial page caching. Is there another way where I can cache all but a few controls?
View 3 RepliesLet's assume you have a big complex index page, that shows news articles and stuff. It's not going to change very often. Can you cache it somehow on the serverside, so requests don't force to server to dynamically generate the entire page every time someone visits it? Or does ASP.NET do this automatically? If so, how does it know if something has changed?
View 2 Replies[OutputCache (Duration=20, VaryByParam="None" )]
public ActionResult display()
{}
This code cache whole page.But, my site has user infomation on top like this ASP.net. The user info "Signed as userid | Edit Profile | ..." section should be changed when user sign in/out. But rest of the page is always same and it's good to Cache.
If the above code is used, the user info on top also cached and give wrong info to user.
Is there any method to check size of all objects in Page.Cache?
View 1 RepliesI know that i can use the VaryByParam attribute, but what it does is not exactly what i am aiming for.
What happens is that different versions of the page are cached based on the query string.
For example Page.aspx?ID=Tom has its own cached version and ID=Arnold has another. Now what i want to do is not to cache Arnold at all. I only want to cache the page when the query string is Tom.
Is there an easy way to cache ASP.NET whole page for anonymous users only (forms authentication used)?
Context: I'm making a website where pages displayed to anonymous users are mostly completely static, but the same pages displayed for logged-in users are not.
Of course I can do this by hand through code behind, but I thought there might be a better/easier/faster way.
I have an aspx page which counts every visit and creates a cookie. But if I use OutputCache page counts only the first visitor who requested the page. How can I prevent this bug?
Page directive:
<%@ OutputCache Duration="1200" VaryByParam="mode;page;sid;tid" %>
Codebehind:
protected void Page_Load(object sender, EventArgs e)
{
//Load single post data
#region Hit Counter
//hit counter lasts during session
if (Session["LastHit" + postId] == null)
{
cmmnd.CommandText = "UPDATE Posts SET Hits=Hits+1 WHERE PostID=@PostID;";
cmmnd.ExecuteNonQuery();
Session["LastHit" + postId] = 1;
}
#endregion
}
am creating a web application in using c# with asp.net.
in that am using login page only as normal aspx page. other pages are using masterpage.
when i click logout button in masterpage. page will redirect to login page. after that if i click browser back button it was moving to previous page. how can i prevent this.
am using this following code in master page aspx page. And My log out button code is below.
<%if (!Page.User.Identity.IsAuthenticated)
{ %>
<script type = "text/javascript" >
function preventBack() { window.history.forward(); }
setTimeout("preventBack()", 0);
window.onunload = function() { null };
</script>
<%} %>
But exactly what i need is once if login page loaded or logged out then it wont go to previous page.
The following code works fine for disabling content page controls, but how do I disable master page controls?
public void DisableControls(Control control,bool isEnable)
{
if (control.HasControls())
{
foreach (Control c in control.Controls)
{
DisableControls(c, isEnable);
}
}
else
{
if (control is IPostBackDataHandler && !(control is IPostBackEventHandler))
{
if (control is WebControl)
{
((WebControl)control).Enabled = isEnable;
}
else if (control is HtmlControl)
{
((HtmlControl)control).Disabled = !isEnable;
}
}
}
}
I've been playing with this for a few days. How do I get an aspx page to cache on the client so that the server returns a 304 response code? I've tried this:
[Code]....
But it doesn't seem to work. Or maybe, how do I -- from inside my code -- return the 302 directly to the browser?
