I'm trying to get threading to work in ASP.NET but for some reason it keeps crashing my local server, and simply does not work at all when uploaded online. Here's the code:
protected void testThread()
{
for (int i = 0; i < 10; i++)
[code]...
I am using threading in my c# code to upload multiple files. The code is as shown below:
[Code]....
When I run this code, the ASP.Net Development Server gets stopped without throwing any exceptions. What might be the reason?
Object objFilePath = (Object)Element;
I've been using MVC since the previews of 1.0 and I think I know what I'm doing, but for the life of me I can not figure out why sometimes when I use RedirectToAction it crashes saying there is no route available. Consider this in MVC 2.0:
I'm registering on my site and I first hit the SiteController, which does its magic then I am to be redirected to my new dashboard, controlled by the... DashboardController. I never make it there. I specify the action and the controller in the redirect call, but it still crashes and burns. The only thing I can possible think of is because the DashboardController is its own area, but that still doesn't help me because by my understanding it should still work regardless.
am trying to upload video into database,but i click and upload video firewall is crashing and it is same with IE is well.
View 8 RepliesI can't see anything about this in the forum, yet it's a problem I have both on my VPS demo box and on some live boxes too:
When I deploy anything requiring a re-compile (e.g. not just an aspx.cs, but a .cs file) about once in every three times, IIS crashes.
This then requires not just a restart of IIS, but a reboot of the entire server, to bring it back again. If I try to restart just IIS, it won't actually "stop", so it won't then start again.
I therefore try to only deploy updates late at night, but in urgent situations a problem which needs rectifying can be made much worse by an additional 5 minutes of hard downtime while the box reboots. I can't predict when this will happen, but now warn all my clients against any updates during "office hours".
Is this a known bug/fault - can I get around this, preferably not by using RDP and stopping IIS completely before I FTP the files across?
Both boxes are 32 bit Windows Web Server.
The text on my website is skewed and different areas are running together when viewing my site on a Mac using either Firefox or Safari. Is there anything I can do about this?
View 1 Repliesi have 2 problems with running&debugging my web projects using visual studio 2008 pro :
1.when choosing to run without debugging , IE is being opened (which is ok , since i chose it to be the default one to be opened via VS ) , and yet when i close IE , it is being opened once again .
2.when choosing to debug , visual studio crashes and IE is being frozen (can only be killed via task manager) ,even when i don't have the "debugger;" string in the javascript code.
i've tried to re-install VS , and also uninstall it and then re-install it, but it didn't help. i have windows xp sp3 home edition 32bit. what should i do? EDIT:about #1 , it seems that from some reason, VS didn't install "Microsoft Visual Studio Web Authoring Component" , and this is also why i had another problem of not being able to use the design/split mode . after installing this component, it seems that IE doesn't run twice anymore. however, i still have crashes of VS when trying to debug (problem #2) ,even thogh script debugging is enabled on IE. the weird thing is that on maxthon2 , which uses IE engine, debugging works just fine.
When I open my web page with my RadEditor version 7.3.6.0 on it to create a new using the editor I get a popup warning on the page.
Soon after this while using Rad Editor I get a message in IE8 (Version 8.0.6001.18702IS) saying the page has been recovered and I have lost all of my edits.
This is also happening to other people, my customers, when they use the same page on their IE browser.
I need to trigger a Console App (exe) file from a asp.net webforms page. Obviously the main issue is permissions, and for now I'm just trying to get this working by letting the asp.net service impersonate the main Administrator account. Once I can get it working in a stable fashion, I'll set up it's own user and permissions. For now I would really appreciate assistance in getting this working.
[code]...
Also, the EXE can be launched directly on the server via RDC and it runs just fine.I've wasted almost 2 days trying to get this to work, and at this point I'm desperate for some experienced input on this job. I'd even be willing to throw in $50 as a thankyou gift to whoever has the solution.
I have the following in a .ascx control and it is crashing today due to leap year I assume. Is there any global setting i can do to make this work?
Code:
<cc1:CalendarExtender ID="TextBox4_CalendarExtender" runat="server" Enabled="True"
TargetControlID="TextBox4" SelectedDate='<%# Datetime.Parse(Now.Month & "/" & Now.Day & "/" & DateTime.Now().AddDays(365).Year) %>'>
</cc1:CalendarExtender>
In my application i am getting data fROM sql server 2008.It is coming from collection of nearly 12 tables. I have to fillter this data in my application and of fillter data i have to write Xml.
my problem is that to fillter i need to that retrieve data to hold in my application and to achieve this i am using the help of dataset and datatable.But most of time when i am running application ,my application getting hang and very slow OR getting crashes.
what is threading and how it is done?
Is there any difference between threading in web applications and threading in winforms applications
MSDN says that MemoryCache's instance members are not thread safe. (http://msdn.microsoft.com/en-us/library/system.runtime.caching.memorycache(VS.100).aspx)
Does that mean every time I call Get() or Add() in a action method I have to wrap it with a lock?
I want to use my functions in DAL asynchronously by executing them in a separate thread. The issue in all this is suppose I have a function DAL.GetProducts() which returns a DataTable. If I execute this function in a separate thread, when it is completed how do I get the returned DataTable from this thread and bind it to my UI?
View 3 RepliesI'm trying to do some multi-threading in my asp.net web site. But I'm having trouble getting my child thread to interact with my main thread. In the following very simple example I would expect that, 3 seconds after clicking the button, the "Hello World" text would be displayed on my page and on my label. Instead, after a few seconds, I get the following error in a pop-up box "WebDev.WebServer20.exe has stopped working - Windows is checking for a solution to the problem.". I am running Visual Web Developer 2010 Express. If you know why I'm getting this error and if you know how to fix the problem respond.
ASPX file is as follows:
[Code]....
CS file is as follows:
[Code]....
This may seem like a really simple question, but can I use the System.Threading namespace in ASP.NET web forms? I have a web page which uses HTTP GET/POST to gather page customisations (title, subtitle, etc.) from the user and numerical input which is passed to a ASMX web service. Currently they work sequentially, the customisation first followed by numerical processing. So can I use threading to do this?
View 3 RepliesIn my ASP.NET website, I am having a function which has to be automatically performed once every 2-3 mins on its own, i.e. without user intervention. This function contains database access.
Can I use threading to perform this process in background?
If Yes, How can I use that?
Edit
Also I am not looking for a solution which includes windows service because I am using shared hosting. So I dont have all the rights to access the host computer.
In my website, I need to do a repetitive task which should not affect the main activity and performance of the website.
So I think I need to use threading. I am new into threading in .Net.
How to use threading is .NET?
I'm a completly noob in Multi-Threading c# web pages... and i'm taking the first steps... I have one web page that create one new thread for each image to load. Each thread only read the external image and save it to local server. I have for example pages that have 25 images... that page loads but it launchs 25 thread (1 for each image).
The code:
[Code]....
I assumed that when a thread finish it's job it will automaticaly be killed, is it that way ?? I'm asking because, when i try this code on the server, after some navegation and multiple images loaded the IIS goes down and the page return "Service Unavailable" error :( To solved it i need to restart the IIS Application Pool... For those that have experience in multi-threading web pages how can i kill this threads ? Aren't they suposed to be killed when their job is finish ? ? Do you know a good tutorial or article for begginers ???
I have a Main page containing links to five other pages. each page has a button which does some job using Thread. Problem is when i open a window from main page and click the button, The Process starts but if now i want to open another page from main window it doesn't load untill that previous page loads fully(when thread ends). I am not using any session variable on my page.
View 2 RepliesI m getting the error System.Threading.ThreadAbortException while exporting datatable to CSV. But export to CSV is completed sucessfully.Here is my Code:
Dim dt As DataTable
Dim sb As New StringBuilder
dt = objsqlds.Tables(0)
[code]...
I've got an asp.net application, it's running on DotNetNuke, under load we get the occasional out of memory exception. I've got a dump loaded it into windbg. the end of !dumpheap -stat is
1192a588 88684 2128416 AutoMapper.MappingEngine
79333594 9482 2266348 System.Byte[]
134b0034 88695 2838240 System.EventHandler`1[[AutoMapper.TypeMapCreatedEventArgs, AutoMapper]]
13d8703c 88684 4611568 System.Collections.Generic.Dictionary`2[[Castle.DynamicProxy.Generators.CacheKey, AutoMapper],[System.Type, mscorlib]]
13d86dc8 88684 4611568 Castle.DynamicProxy.ModuleScope
13d865bc 88684 4611568 System.Collections.Generic.Dictionary`2[[AutoMapper.Internal.TypePair, AutoMapper],[AutoMapper.IObjectMapper, AutoMapper]]
79327434 88703 4612556 System.Collections.Generic.Dictionary`2[[System.String, mscorlib],[System.Int32, mscorlib]]
6c38e4e4 88684 5675776 System.Threading.ReaderWriterLockSlim
79330b24 87736 6458012 System.String
000d9c88 129 24186884 Free
793042f4 221202 101117016 System.Object[]
6c38e4a0 22703104 544874496 System.Threading.ReaderWriterCount
I can't find much information on the System.Threading.ReaderWriterCount, as it seems to be the problem. What is the likely cause? Or failing that what's the best next step to work that out? Based on the pointer from the given answer I had a look at ReaderWriterLockSlim. I wasn't using it directly, but I saw that it had 88684 instances, digging deeper I saw quite a few classes with that number of instances, pointing to AutoMapper.MappingEngine. This should be a singleton, so I've had a look at where it's being created. I suspect that it's the DI container and have made some changes around that to see if it helps
I have a web app where a user will visit a page with a QueryString parameter passing the ID of the object I should retrieve.
What I then need to do is run a number of checks to ensure the user can access that data, and also find out if another user has a lock (recorded in the DB) on that object.
Currently these searches are all performed sequentially, however I'm thinking the best option might be to use delegates to be able to fire off the three or four searches required at once then use the results as they are returned.
My implementation for this would be using a delegate(s) and calling BeginInvoke, however I'm worried the overhead of threading this may lead to no speed increases.
My research has indicated it will use the ThreadPool, so there shouldn't be too much overhead, but I'd like to know if anyone has implemented this kind of solution to a similar scenario on a high traffic site and seen good resutls from it?
The reason I'm looking to do this is we are reengineering our application from the ground up, and need to make sure we are building something that will scale considerably.
I have a .NET 4.0 console application that does a lot of reads from SQL Server 2008 using the OleDbDataAdapter object.I tried to improve performance by spreading the processing logic across four threads using Visual Studio 2010's Task Parallel Library. Sadly the multi-threaded version is three times slower than the original. Using VS2010's performance tools, I found thousands of thread contentions caused by the method OleDbDataAdapter.Fill() which populates a DataSet.This is puzzling as there are no static classes or variables involved that would result in the OleDbDataAdapter being shared by my threads. Also, four simultaneous connections just can't cause a hold up at the database level, right? The default connection pool size should be much larger than this.
View 1 RepliesI have one button on my page. On click of this I need to run four methods parallely in four saperate thead and need to show the progress bar for each method. Also need to update the label controls form those threaded methods.
Also I need to user Update panel of AJAX control tool kit to avoid post back to user.
I have used the read pool for that. When I remove the update panel the code works fine and update four labels but when I put the update panel it is not updating the labels.