Asynchronous C# Method Calls In Page Working On Debug, But Not Working On Live Site
Jan 25, 2011
OK Here is the situation:
I have a web app with a table of statistics on our salesmen's customers, and each row has a sparkline graph showing the general trend of the sales data for the last 12 months. Each page shows a particular salesman's customer list, and some of them can have an enormous number of customers = an enormous number of rows = an enormous number of sparklines (e.g. one in particular has 125 and takes 15 seconds to load).
For this reason, jQuery sparklines could not be used - they completely pinned the CPU of a user accessing a page with a lot of sparklines with IE.
So I moved on to using the Google Chart API, which worked much better, except for two issues: 1) it's on a secure site, and the Google Chart API URL is only served over HTTP (solved by using a small wrapper script to download the graph dynamically and re-serve it from our secure server); and 2) on a page with 125 sparklines, it was still very slow due to the number of requests (even when the 0-9 server prefixes are used to maximize the # of available connections).
So my next step beyond this was to try to make each of the "download/grab/re-serve image" method calls asynchronous - and it worked!
...but only on my dev box running in debug mode.
When I pushed it up to the live site, it was faster, but it left some of the images unloaded, which is of course unacceptable.
So here is what I was hoping some SO hotshot would know:
1) Why are my asynchronous method calls working while debugging, but not working on the live site?
2) Is there any easier way to get a large number of sparklines of some sort to load quickly on a secure server without making me want to tear my hair out?
2a.) Does anyone have any experience using the ASP.NET Chart Library? Is this something I should investigate?
2b.) A co-worker suggested I make my own sparkline routine using a 1x1 CSS background image and varying the height. The problems are a) it is completely un-extensible in case we want to make changes; b) it seems hacky as hell (leaves about a bajillion DIVs per sparkline in the markup); and c) I have no idea if it will be fast enough when there are 100-200 of them on one page - what are your thoughts on the feasibility of the 1x1 sprite approach?
I am relatively new to asp.net. In My asp.net website, i have a method GetData(int id) which is called Repetitively, depending on id count, GetData is desinged to get data from sharepoint and sql server both. if the Id count is high say =10, my page load time increases because GetData is called 10 times and the page load time keeps adding up. so I want to ask, is there any way that this GetData() be called asynchornously or by the use of some thread, so that my page loads faster.
We have a Page Method on a web page using ASP .Net. We tried to put in a trace statement using both System.Diagnostics and System.Diagnostics.Debug. In Visual Studio 2008, the break point is not even hit for the line, but other break points on other lines are hit.There is no output from either method that we can see.
There is also a Global.asax error catcher that works fine in other cases, but in the Page Method is not being catched.why a Page Method and System.Diagnostics do not play well together?
My application is working fine in local environment but not working after push code in live. My locale environment and hosting environment both are having same configuration. Same app working fine 2 month before but in different domain but same hosting server.
how to check the both config / any possible to run debug mode in hosting server please let me know. below code used in all page for checking user session status but when I click on any link page redirect to login.aspx I think session got timeout. I don't know why session got time frequently, but this issue not happening in local environment (desktop).
i have tried autocompleteextender using page method and without master page and its working. but now im try to put them into master and its not working. this is my code***********pagename.ascx
I have a button that updates a datagrid that is in an update panel and everything works swimmingly in the dev area but when i publish it it just doesnt work.
appart from that everything else on the page works as normal
I have just put my first ASP.Net site live on the internet but im having problems with my login. When i try to login my sit is throwing an error.
The SSE Provider did not find the database file specified in the connection string. At the configured trust level (below High trust level), the SSE provider can not automatically create the database file.
I have run my script from visual studio so the profiles are there but i cant login?
I inherited some web shop project (asp.net 3.5, web forms, visual studio 2008 pro). On one page I have MaintainScrollPositionOnPostback set to true. When shopping cart (user control loaded in master page) is empty, then asp.net is not generating javascript code required for scroll position. When I add some items to the cart, then everything works fine.
how to find part of the code which is responsible for this issue? I don't have an access to the 3rd party profilers.
I installed Web Matrix and then installed the NopCommerce site from the web gallery. I set a break point in the default.aspx page_load but when I try to debug it skips the break point because it says "~no symbols loaded..."
When I pressed play button initially it asked if I wanted to enable debugging and I answered yes.
I got a problem regarding CSS in my pages. I managed to apply styles to my page using css and everything looks fine in the Design view. I ran it on IE8 and everything is working fine. Now after I returned to Visual Studio, added some rules to my CSS, and noticing that everything is working fine in the Design view, I ran it again in IE8 and nothing has changed. The rules I added was ignored and it looks the same. I ran it on Firefox and Google Chrome and it's working fine.
But if I ran my project in IE8 through IIS7.5, everything is working fine so it means, the problem is within visual studio 2010.
I'm starting a new web site which involves a Novell/LDAP login to enter. Just installed VS2008, using framework 2.0, configured web.config to use authentication using form login.aspx which is the LDAP form we reuse from app to app. Debug is enabled, in form and in VS options. I'm running with localhost web server. Problem is debug doesn't work in the login form, does not stop at breakpoints I put in page_load event. Tried to bypass the login form to make sure, turns out debug will work on some startup form I made but does not when I redirect to login form. It seems VS2008 does not like something in my login form.
I am currently developing a project management application using ASP.NET (VB). I am nearly done with it. But whenever users select an item from drop-down list control, a post back is triggered and screen is returned to the bagining. This is very irritating at times.
So, I want to know how can I make partial postbacks so that page is not refreshed again and appropriate binding of list control with my oracle database is also made.
We have a custom Ajax checkbox control. In that control we set value (from inside the control) via a web service call (say WSCall1) to the business engine. There is also an event exposed on the OnClick of checkbox for the end user to have their custom code where the end user have their own web service call (say WSCall2). This event that end users will write is handled inside the ajax checkbox control on the "OnSuccess" of the internal web service call (i.e WSCall1) with an expectation that if WSCall1 succeeds, WSCall2 will get executed. This works fine with Firefox and Chrome but not in IE. In IE sometimes WSCall2 gets executed first and then WSCall1 -- actually there is no gurantee which web service gets called first. For WSCall1 we have used " Sys.Net.WebServiceProxy.invoke"
Is there a way we can make sure that WSCall2 gets only executed on the "OnSuccess" of WSCall1? Isn't the OnSuceess supposed to be executed when the WSCall1 thread returns?
I made an aspx site with .net 4.0 framework through visual studio and it worked perfectly in the development environment but when I upload it to the server and try to run it I get this error: Server Error in '/' Application. Runtime Error Does anyone have an idea on how to fix this?
I use AJAX controls a lot - AJAX update panels, AJAX-enabled grids, etc. (mostly from Infragistics), and most of the time, things work great. But sometimes they don't, and I have no idea where to start with debugging etc. The AJAX part of it is a black box (seemingly), and I really don't like that. I want to know enough about AJAX and javascript such that I have confidence to work with these controls instead of just praying that they work. I want to be able to debug them, and also have confidence that I am using them properly (because I don't feel I can possibly use them really properly and appropriately if I don't know what they are doing). What do I need to know to get this comfort? Where can I learn about this? How should I go about tackling learning about this?
I am currently developing a project management application using ASP.NET (VB). I am nearly done with it. But whenever users select an item from drop-down list control, a post back is triggered and screen is returned to the bagining. This is very irritating at times.
<p> So, I want to know how can I make partial postbacks so that page is not refreshed again and appropriate binding of list control with my oracle database is also made.
I have been moving my application to be more AJAX-based. Currently I have a web service call where I use jQuery to gather some textbox (string) and checkbox (boolean) results and pass it to a web service. Everything works really well, the response time is super quick. The only downside that I can see to this is
1) you need to use jQuery, which will add to the user's download time - this doesn't really affect my application too much because I am using jQuery throughout the site
2) users can see the code and potentially try to hack the web service because they know where it is
I am most concerned with #2. I've been reading a lot about .NET web service calls, using IAsyncResult,
http://msdn.microsoft.com/en-us/library/2e08f6yc.aspx, and I am beginning to understand the 4 methods available in this article. However, is there extra bloat using this way compared to the jQuery web service call?If there isn't that much bloat or lag time using this method, I'd like to convert my application. Which one of these 4 methods is best in a scenario where I am just returning a small string value? The 4 methods in the article are to wait for EndInvoke itself, which from what I read is not recommended because this may block the first thread; and this should not be used on a service that affects the UI.Create a WaitHandle to wait for the 'OK' before EndInvoke is called Poll the IAsyncResult for .IsCompleted, using sleep() and a Do While until IAsyncResult.IsCompleted is true, then call EndInvoke Pass a delegate function to BeginInvoke to be called once the operation is complete.
I am using Visual Studio 2010 and ASP.NET 4.0 to build a WebForms project that uses the new routing features in System.Web.Routing. When I build my solution and run it from within VS.NET's debugging environment only routes with RouteUrl's that include a ".aspx" extension are being properly routed to the PhysicalFile. It appears requests made to other URLs are not being "detected" by the routing engine for processing. In the case below, "Scenario1" shows a 404 and "Scenario2" works properly.
i have the code for asynchronous call to the database. i execute the sql command into the begin method that will executed onto the separate thread. now i want to execute the another database call asynchronously so that this also execute onto the separate thread. code for one database cal is here....
I am working at a site not orginally devleoped by me. The problem is that all the pages are working fine and have no problem at my local site. but the site is not showing any content at live site from database. Niether it shows an error for it. How can I find the problem?
