Is it possible to detect whether an ASP.NET Page is about to be cached and if so, how?The HttpCachePolicy object provides only set-methods. The VaryByParams name-value collection is useless if values other than "None" and "*" are set as it impossible to enumerate them and you can only access them by key
View 1 RepliesI'm implementing Outputcache in my application and it works fine, but the first time always take a lot to load and the next following request will be faster...
I would like to know if there is a way to initiate the page caching on the server side and serve the cached page upon the very first request, rather than have it triggered by the user one first time.
why all the resources in my page are being requested EVERY single time. E.g. my site.css returns the following headers (using fiddler):
HTTP/1.1 200 OK
Server: ASP.NET Development Server/9.0.0.0
Date: Mon, 29 Nov 2010 17:36:21 GMT
X-AspNet-Version: 2.0.50727
Content-Length: 9093
Cache-Control: public, max-age=2592000
Expires: Wed, 29 Dec 2010 17:36:21 GMT
Last-Modified: Mon, 08 Nov 2010 17:20:16 GMT
Content-Type: text/css
Connection: Close
But every time I hit refresh I see all the resources (css,js,images) getting re-requested. I have control over the headers returned for any and all of these resources, but I haven't figured it out yet.I have even debugged my ASP.NET app and the HttpModule is definitely being asked for the resources again.
EDIT:Ok, I removed must-revalidate, proxy-revalidate from the headers and that is getting me closer to where I want to be, now when I press back it still requests my css/js files when I press back.
My web page is still displaying a previously cached versions of the page. I have this in the page_load event:
Response.Clear();
Response.Buffer = true;
Response.ExpiresAbsolute = DateTime.Now.AddDays(-1d);
Response.Expires = -1;
Response.CacheControl = "no-cache";
Response.Cache.SetCacheability(HttpCacheability.NoCache);
I have this in the Page_Init:
protected void Page_Init(object Sender, EventArgs e)
{
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Cache.SetExpires(DateTime.Now.AddDays(-1));
}
Lets say you have a page with headers that tell the browser not to cache.Also, this page has already been posted back to itself.Now you hit the refresh button and you click cancel on the IE modal box with the "previously submitted..." message.You get "Webpage has expired". This doesn't happen in FF or Chrome.Is there a way to prevent the "Webpage has expired" message in IE?Since the page isn't cached, I guess IE has nothing to render.But if the page isn't cached and FF and Chrome shows it, I guess they just show the page as previously shown?
View 1 Replies"Firstly check if "default.aspx" page is cached on the browser or not; if yes then Response.Redirect("default1.aspx"); else Response.Redirect("default2.aspx")
View 5 RepliesIs there a way to prevent a page from being cached based on some logic?
I want to cache anonymous access to a page, so I can set VaryByCustom="user" and have some magic in Global.asax's GetVaryByCustomString method. Ok. But I don't actually want to cache the page if the user's authenticated, only if it's not authenticated. Is there a way to specify this kind of thing?
The reason I want the data to not be added to the cache to begin with (instead of added with some random key) is that as the cache grows things get thrown out and I don't want the non-authenticated version to get thrown out.
When is the cached Page class updated and rebuilt?
View 1 RepliesI Have a TreeView that I populate from a DataTable.Once it has been populated, I Cache the Treeview.If I try to add the cached TreeView control to my page, nothing happens. No errors no nothing.If I create an empty TreeView control on the page and do a "Do Until" loop and add each node to that empty TreeView, that works! but only once. The next time it loops, for some reasion the CachedTree.Nodes.Count = 0.I can't see what I'm doing wrong.
[Code]....
I have been developing a quiz application in asp.net mvc. In this quiz user is give a list of topic to take quiz. On click of one of the topic the user is taken to new page. In the get part action of this page i have taken some parameters, generated questions for the quiz, register quiz for the user (save in db)and save the generated questions in db.
Now the problem is:
User see the page, if user hits the "submit" button after selecting the answer than it is ok but If user refresh the page. Then the get action is called again and new set of questions are generated and new quiz is registered to user.
How can i avoid this?
Is there any way to detect that the get action is called the second time or to detect page refresh in as.net mvc.
If you could suggest design changes that it is ok too? i just need to make sure if user refresh the page the question need not be generated again and new quiz should not be registered to user.
I have a sitemappath that I want to surpress on the home page of a website. Assuming the homepage is "www.mysite.com/default.aspx", what is the best way to detect when the base URL is being displayed?
IOW: I can do something like:
if request.servervariables("url") = "/default.aspx" then
sitemappath1.visible=false
end if
but how do I detect when the default url is being used, like:
www.mysite.com
without a page url at the end?
How do I have a pop-up message come up that says "Are you sure you want to navigate way from this page? (OK) (Cancel)" when someone either clicks the back button or the close button?
View 2 RepliesI am currently working with reading data from a USB card reader and it sends a page submit command along with the card track data.
Is there a way for me to detect a page submit command and can I programmatically disable the submit command?
Detecting Page load Completion? How could we do this using jscript or jquery, would it be possible? Kindly give your views and ideas. I have an asp.net web page, which is huge and takes time to load. If the user clicks on any buttons on the page, before the page completes it's load, we get error messages. Since some of the hidden field values in the page, have value=0 because the page did not complete it's load. I hope I was clear with my question. Meanwhile I need to work on improving my code to process quick.
I do have an update panel, on my page.
My masterpage for my website has the Login control which sits right on my main nav bar. The problem I have is that I'm currently not detecting the current page hence not setting the ReturnUrl parameter. So when the user clicks login and goes through the login process, he/she is sent back to the home page.
How can I set the ReturnUrl while still keeping the Login control in the master page?
I designed my page (Using ASP .net C#) in 1024*768. if resolution of the screen decresed(ex 800*600) then vertical and horizental scroll bar appear. And if resolution of the screen incresed then right side of the screen is become blank. i want whatever the screen resolution is there my page is run fine after detecting the resolution of the screen and then run.
View 4 RepliesI am working with a pretty complicated .aspx page that is full of controls (Telerik, Ajax, etc.) that all expand, collapse, show, hide, etc. when the page is loaded. Since this rendering happens on the client-side and can take different lengths of time based on the users machine specs, is there a way to detect when all (or some) rendering has taken place (jQuery?) so I can then act on specific elements, knowing they are fully rendered?
View 5 RepliesI'm pretty new to ASP.NET and very new to the concept of caching.
Using MCMS 2002, I built a template.aspx page that receives a "person_id" query string and builds pages accordingly. Several different departments at the school where I work are using this template to display faculty biographies. This much is all working correctly.
The Problem
The problems start happening when I try caching the page. When a person visits person_id=16175 on one department's page, then visits the same numeric bio on a different department page, it loads the cached page instead of rebuilding it. The problem, then, is that it has all of the wrong department branding. For example:
[URL]
It's the same person_id, but the URLs are obviously different. It would be great if the template would recognize the different URLs and ignore the cache. I'm assuming that the problem lies in the fact that both pages are being built using the same aspx page on the backend. Here's the OutputCache bit from the aspx page:
<%@ OutputCache Duration="86400" Location="Server" VaryByParam="person_id; section" VaryByCustom="CMSPosting" VaryByHeader="Referer" %>
I assume I'm doing something wrong here. Hopefully it will be obvious to someone who knows that they're doing. If you need more info, don't hesitate to ask.
I have a collection of links I response.redirect to the first one. if the first one errors with page 404 ie page does not exist i want to redirect to the next one. If the next one errors I then want to redirect to the one after etc. Basically go through the collection and redirect to a link that doesnt error with page 404 error. is this possible in .net 2?
View 3 Repliesis there any simple way to detect that I'm on the last page of my ListView? I need this because I want to fill empty space below my ListView with a panel if number of rows is smaller then 15 (Rows per Page)
For example (logically): If MyListView = LastPage....Panel.Enabled=True
There is a thread addressing this but it does not provide the type of answer I am seeking.
When login page is requested due to timeout, there is query string parameter "ReturnUrl" which is very nice and I want to keep that. However, timeout is not the only scenario that generates that parameter. If a restricted page is requested before the user is authenticated, such parameter exists too.
Here is my question is, how can the timeout be detected in the code-behind of the login page assuming the login page is directed to by IIS not by code-behind?
I have a button that executes a script using AJAX.Normally when a session is still active the script will return some data that will be placed inside the parent page.If the session expired the AJAX will return the login screen which gets placed inside the parent page which looks really odd.How would I be able to detect a session timeout and do a postback on the parent page?
View 2 RepliesI just want to know how to detect a page is refreshed or reloaded apart from Postback. Just clicking the reload button in the browser...
View 1 RepliesGenerally we should have control of our AppPools and be able to force the Managed Pipeline Mode. In my case I don't have control and would like to implement the code behind code a little differently based on the Managed Pipeline Mode (Integrated vs Classic). I just don't know how to detect this. Is there a simple way to do it from within the code behind page?
View 1 RepliesI have web application workung with master page.I want to know when the user is closing the browser' then I'll raise event to clean' session variables.How can I detect the browser closing/I tried the unload jscript event' but it fired when I move from page to page.
View 2 Replies