Web Forms :: User Control Output Caching?
Jan 11, 2010
I have a user control (say PricingGrid.ascx) which generates a pricing grid on a given product's page. I pass the user control 2 parameters : currencyId and productId. The user control has output caching specified by
[Code]....
I am adding PricingGrid.ascx to my page programatically, i.e. using LoadControl [URL]If the user changes their currency and refreshes the page, the cached version of their original currency is still showing, until the 60 seconds expires. Is there any way to force the page to check :1) Does a cached version of PricingGrid.ascx with their new currency exist?2) If so, retrieve that version, and if not, create that version.If I output all the keys in the Page.Cache object on PageLoad, I'm not seeing my user control in the output.
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Mar 4, 2011
I have a page which contains a user control. The structure of the page is as shown below:
Incase your not able to see the above image, check it at [URL] Now, apart from the contents of the UserControl, I'd like to cache the entire page. I tried using the OutputCache attribute in the .aspx page, however it caches the contents of the UserControl as well.
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Jun 14, 2010
I have a page with a number of user controls, In one of my user controls I have a button event. I turn on output cache for the user control that has the button and vary by control using the ID property of a hidden field control in the user control. whenever I turn on the output cache my button event doesn't fire.
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Mar 3, 2010
I have a user control (.ascx file). I simply put this tag in the page declarations section:
<%@ OutputCache Duration="60" VaryByParam="none" %>
It is not caching. The control makes a call to SQL and displays some information. I tested it by changing a value in the database and refreshing the page. The control keeps making a call to the database eventhough I have the duraction set to 60 seconds. Am I missing something? Do I need to add code in the Page Load event?
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Apr 22, 2010
I am trying to use output caching on my .net pages but it is not working when I use Route handlers to redirect request to actual page, but it works when I call the page directly.
also one more weird thing is that when I am debugging and using .net instance of IIS http://localhost:64293/test it is working, but when I deploy it and try to call the page it is not caching i.e. http://www.mydomain/test(but it works if I call the page directly)
I am using VS 2010, IIS 6.0, .net Framework 4
aspx page code is :
<%@ Page Language="C#" AutoEventWireup="true" MasterPageFile="~/Site.master" Title="Not Found" %>
<%@ OutputCache Duration="300" VaryByParam="*" Location ="Server" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
litPageTitle.Text = "<br/>Datetime: " + DateTime.UtcNow.ToString();
}
</script>
my global.asax.cs code is
public static void RegisterRoutes(RouteCollection routes)
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Apr 7, 2010
I have a page with outputcache right above the action in a controller class. What I want is to disable this outputcache for myself. Can it be done by IP?
Something like that: [OutputCache(Duration = 60, VaryByParam = "None", IgnoreIP = "100.100.100.100")]
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Sep 21, 2010
I plan to use output cache for my page and also specify sql dependencyi succeded in doing it the following way
[Code]....
Suppose if i want to implement a dependency on the sql query , i create an sqlcache dependency object and specify the sql command to it.Set the notifications .But how do i add this sqldependency to the output cache?For example: if i need to add a file dependency, i give something like Response.AddFileDependency ("filepath"); is there any similiar command available for sqldependency as well? I'm confused about this because, most of the examples i've looked into, does a cache.insert , which defeats my purpose as it's object caching and not output caching. In a nutshell, is it possible to attach a sqlcachedependency to o/p cache inside the controller action
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Jan 28, 2010
Does output caching help boost the performance of asp.net mvc pages that just consist of html, css, images, and javascript?
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Sep 25, 2010
I have aspx page with a user control. I want to implement caching for the entire page except the user control.
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Sep 8, 2010
My asp.net app is heavily using user controls and is high load; my concern is that loading user controls for every request (Page.LoadControl(controlPath)) is sub-optimal at best. I was thinking of caching an instance of loaded user control in HttpRuntime, but I don't know how's it going to behave when multiple connections (threads) will try to fetch it from the cache and modify properties - I guess trouble is waiting there. Any good way to optimize user control loading?
Again, I am talking about caching user control, not it's html output (which it makes no sense caching as it's [html output] going to be different every time you use it)
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Jun 8, 2010
I'm using output caching in my custom HTTP handler in the following way:
public void ProcessRequest(HttpContext context)
{
TimeSpan freshness = new TimeSpan(0, 0, 0, 60);
context.Response.Cache.SetExpires(DateTime.Now.Add(freshness));
context.Response.Cache.SetMaxAge(freshness);
context.Response.Cache.SetCacheability(HttpCacheability.Public);
context.Response.Cache.SetValidUntilExpires(true);
...
}
It works, but the problem is that refreshing the page with F5 leads to page regeneration (instead of cache usage) despite of the last codeline:
context.Response.Cache.SetValidUntilExpires(true);
UPD: Seems like the cause of problem is that HTTP handler response isn't caching on server. The following code works well for web-form, but not for handler:
Response.Cache.SetCacheability(HttpCacheability.Server);
Are there some specifics of the caching the http handler response on server?
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Apr 9, 2010
Iam adding SqlCacheDependency programmatically but Iam not able to invalidate the cache.
Iam using the following Output cache directive in the .aspx page
[Code]....
The code in the .aspx.cs file is:
[Code]....
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Sep 30, 2010
I've seen a number of options for adding GZIP/DEFLATE compression to ASP.Net MVC output, but they all seem to apply the compression on-the-fly.. thus do not take advange of caching the compressed content.
Any solutions for enabling caching of the compressed page output? Preferably in the code, so that the MVC code can check if the page has changed, and ship out the precompressed cached content if not.
This question really could apply to regular asp.net as well.
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Jul 23, 2010
I have a page with the following caching defined:
<%@ OutputCache Duration="60" VaryByParam="None" %>
I have a user control inside that page that i don't want cached. How can I turn it off just for that control?
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Jul 13, 2010
I'm trying to cache user controls and on some pages i want to cache single objects. There are multiple ways of implementing caching, and my head is breaking over it.
The way I see the caching options now:
You have the PartialCaching option which is set to cache the control for 30 minutes, and after that it clears itself... You have the varyByParam to identity the page by its querystring paramaters... or other vary options
But i just cant find an appropriate way to add caching to a control, and be able to clear the caching programmatically when i update one of the objects used in the control from the backend.
You can do HttpContext.Current.Cache.Insert(), which accepts a key on which you can destroy the caching item later by using remove... This can save objects in cache but can you use options like varyByParam?
My questions are burnt down to two:
Is there a way to clear the caching on specific user controls from the code? If yes, can this be done according to the varyby options? How would the object caching respond to logged in users or anonymous users using Insert()?
EDIT: I'm caching multiple things.... And I'm really flabbergasted in which choice to make referring to caching. Can the Cache.Insert be varied by Parameters?
The main problem is peopling editing things from the backend, which needs to trigger an event that reinstantiates or clears all caching items referring that object.
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Jan 10, 2011
Output Caching .NET 4 on any view. But I can't extend the output caching (on a disk) for a partial view(RenderAction).
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Jul 9, 2010
Ive tried [OutputCache] for a view that is rendered from Html.RenderPartial, but it doesn't work! It works perfectly for 'normal' views.
How do I cache output for partial view?
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May 17, 2010
I would like to use output caching with WCF Data Services and although there's nothing specifically built in to support caching, there is an OnStartProcessingRequest method that allows me to hook in and set the cacheability of the request using normal ASP.NET mechanisms.
But I am worried about the worker process getting recycled due to excessive memory consumption if large responses are cached. Is there a way to specify an upper limit for the ASP.NET output cache so that if this limit is exceeded, items in the cache will be discarded?
I've seen the caching configuration settings but I get the impression from the documentation that this is for explicit caching via the Cache object since there is a separate outputCacheSettings which has no memory-related attributes.
Here's a code snippet from Scott Hanselman's post that shows how I'm setting the cacheability of the request.
[code]....
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Apr 7, 2010
I want duration to be configurable from Web.config file, so user can alter the output caching after deployment.
For achieving such puropse i need quuivalent C# codebehind snippet of following ASP.NET markup?
<%@ OutputCache Duration="120" VaryByParam="CategoryName" %>
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Feb 25, 2010
I have a need to run an application in classic mode for backwards compatibility with a specific application, and am trying to understand what kind of impact that will have on the performance of an MVC application that is running on the site. If we put a few static file maps (for .js, .css, .png, etc) above the ASP.NET wildcard map to reduce the amount of processing by the ASP.NET handler, will we be approaching the integrated mode in terms of performance?
The thing i'm primarily concerned with is any effect this might have on output caching. I understand that integrated mode might (?) allow for the output cache to handle non ASP.NET content, but that isn't really a concern. We're more interested in ensuring that the MVC application has full use of the output cache. Empirically i've found that the two configurations operate on par when things go well, but if the page references resources that are not available, the integrated mode tends to fail much more quickly than the classic mode (e.g. 500 ms vs 10 seconds), reducing 'hang time' on the page load.
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Mar 17, 2010
I currently work on an in-house 'CMS' that is fairly old. It has one 'content' field where the html of a CKEditor is saved and presented to each content page.
What I would like to do is be able to replace some special tags with the output of a control. So for example:
The content string would be
[Code]....
Then, when rendering the page, replace the '[%LatestNews(to=2010/01/01)%]' with the result of a user control. The user control may contain a asp:Repeater control or something that lists the required content.
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Feb 3, 2010
I have some code that is used to replace certain page output with other text. The way I accomplish this is by setting the Response.Filter to a Stream, Flushing the Response, and then reading that Stream back into a string. From there I can manipulate the string and output the resulting code. You can see the basic code for this over at [URL] However, I noticed that Page Caching no longer works after the first Response.Flush call.
I put together a simple ASP.NET WebApp as an example. I have a Default.aspx with an @OutputCache set for 30 seconds. All this does is output DateTime.Now.ToLongTimeString(). I override Render. If I do a Response.Flush (even after the base.Render) the page does not get cached. This is regardless of any programmatic cacheability that I set. So it seems that Response.Flush completely undermines any page caching in use. Why is this?
extra credit: is there a way to accomplish what I want (render output to a string) that will not result in Page Cache getting bypassed?
ASPX Page:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="TestCacheVsFlush._Default" %>
<%@ OutputCache Duration="30" VaryByParam="none" %>
<%= DateTime.Now.ToLongTimeString() %>
Code-behind (Page is Cached):
protected override void Render(HtmlTextWriter writer)
{
base.Render(writer);
}
Code-behind (Page is not cached):
protected override void Render(HtmlTextWriter writer)
{
base.Render(writer);
Response.Flush();
}
Code-behind (Page still is not cached):
protected override void Render(HtmlTextWriter writer)
{
base.Render(writer);
Response.Cache.SetCacheability(HttpCacheability.Server);
Response.Cache.SetExpires(DateTime.Now.AddSeconds(30));
Response.Flush();
}
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Feb 10, 2011
i have a usercontrol called navigationmenu whose data is static but varies with loged in1.empID 2.empType 3 Country my question is how can i cache the data of usercontrol based upon combination of these 3 parameters
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Aug 26, 2010
i have 2 questions about output cache:1.is it just me , or does it seems that it is used only after the second time that the user reaches the webpage? if so, why, and how can i tweak it to my needs? my guess is that it wouldn't be logical to cache every time a user reach a webpage, but only when it happens enough times.2.i know that i can use "varybyparam" for using the output cache when the parameter doesn't change , but it seems that it would use the output cache even if there is no parameter , or if the specified paramter is not there. is there a way to overcome this?3.an old question that somehow marked as "answered" , yet i didn't solve : suppose i created a user control and i gave it values through the CTOR via the aspx file . is it possible to show the values from within the split/design mode? remember that i've talking about ASP.NET and not simply C# winforms . i write this because this question was on :[URL]and the answer that i got was for C# and winforms . i've tried to do the same for ASP.NET , but i've failed.
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Apr 8, 2010
In our .aspx pages we have user controls each control has a Sql query to fetch data. The caching mechanism to be followed says that fragment cache all the user controls and invalidate the cache based on the respective queries of the user control.How to proceed to add a query dependency to fragment cached user control?
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