C# - Use For A SOA Solution To Exec A Long Running Task?
Jan 30, 2012
I am developing a solution in .Net utilising the VMWare Web Service API to create new isolated virtualised development environments. The front end will be web based. Requestors input details for the specific environment which will be persisted to SQL. So I need to write an engine of some sort to pull the data from SQL and work on the long running task of creating resource pools, switch port groups and cloning existing VM templates etc. As work progresses, events will be raised to write logs and update info back to SQL. This allows requestors to pull data back into a webpage to see how it's progressing or if it's completed.
The thing I am struggling with is how to engineer the engine which will exec the long running task of creating the environment. I cannot write a windows service (which I would like) as we work in a very secure environment and it's not possible (group policy etc). I could write a web service to execute the tasks, extending the httpRuntime executionTimeout to allow the task to complete. But I'm keen to hear what you guys think may be a better solution to use (based on .Net 3.5). The solution needs to be service oriented as we may be using it on other projects within our org. What about WWF, WCF? I have not used any of the newer technologies available since .Net 2.0 as we've only just been approved to move up from .Net 2.0.
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Dec 29, 2011
I am developing a web application in asp.net vb. My current situation is,I have a main site say [URL] and another site for generating reports depending on certain user ids say [URL].If I click a button on [URL] I have to switch on the generate report page on [URL] and return to[URL]. [URL] should generate report and set a flag in database of [URL].Currently I am redirecting to the page in xyz.com and add the long running task to queue as follows and redirect back to [URL].
If ThreadPool.QueueUserWorkItem(New WaitCallback(AddressOf LongTimeTask), New Object) Then
Response.Redirect(returnURL)
End If
But the problem is its not dependable. Means some times the queue is executing correctly but some times not. There are no errors in long time task. Just the queue is not executing.
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Jun 9, 2011
I have an application that I wrote in visual basic 2010 express.I want it to be able to run simply when a click on a shorcut.I have tried 'publishing' it to create a shortcut but this only opens a bunch of files, but no executable files.How can I create an executable file???
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Aug 18, 2009
I have a solution which consists among other things 2 windows applications.I would like to be able to run the first windows application then click on the second windows application and run that as well.
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Jul 5, 2010
I'm going to design an Application (C# or VB.NET) which use .NET Framework to run for very long time. It may be restarted every year or even more...Is there anything (using special design patterns or so) which I must care about in designing "Long time running applications in .NET"?
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Jun 29, 2009
I have a web request that can take 30-90 seconds to complete in some cases(most of the time it completed in 2-3). Currently, the software looks like it has hung if the request takes this long. I was thinking that I could use background worker to process the webrequest in a separate thread. However, The software must wait on the request to process before continuing. I know how to setup the background worker. What I am unsure about is how to handle waiting on the request to process.Do I need to create a timer to check for the results until the request times out or is processed?
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Jun 2, 2011
I have a service ticket management application and users want to open several ticket details on a tab in a MDI frame. Since this application has to communicate through Web XML service with other company, it takes around 15 ~20 seconds. The users most complain is that he needs to wait until a saving process is done. Cursor is working while data is being saved and other can't be done
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Jun 30, 2010
I have written a program that searches a bunch of urls and pulls out information that I need. The program works to an extent. Everything codewise works, but it seems like I did a sloppy job of pulling the code together. After about 10 minutes of running, the program just becomes unresponsive and I have to close it through task manager. I've seen it range from 100k to 350k in memory useage. It also uses about 80%+ cpu usage at all times. I hope someone might be able to see something that I forgot or did wrong as the program is meant to run almost full time, executing parts of code on certain days/times.
Dim con As New SqlClient.SqlConnection
Dim strCon As String = "Data Source=server;Initial Catalog=database;Integrated Security=True"
con.ConnectionString = strCon
[code]....
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Apr 10, 2009
Back when i used vb i used an unload form command which allowed me to completely close it. but now i cant use it in 2008 [code]...
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Jul 6, 2012
for example:
dim a as long
for i as integer = 1 to 10000000
[CODE]..........
It will hang when it run til half way.
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Jan 31, 2011
I'm currently trying to write a football simulator but am having issues with the computer becoming unresponsive. There are long lines of code (several thousand lines) that are executed over and over as one run of the code is equivalent to one second of game time. While the game is setup to be like Football Manager where you watch the game live, there will also be cases where the entire game is simulated without you watching. When doing a full sim of a game, I just have a loop which executes the code block 7200 times (games go for two hour roughly).
At the moment this takes about a minute but even when I get it down to the desired 5-10 seconds or so, I dislike the fact that the computer becomes completely unresponsive during this time. In a round there are 9 games and you'll be simulating without watching 8 of them. You're looking at 1-2 minutes of simulation time or possibly more. I can't have a loading screen that long! How can I program the game so it runs these simulations yet the game still remains responsive? It'd be fine if the user could muck around in the menus and stuff while the simulation runs.
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Aug 1, 2010
I'm using a BackgroundWorker to perform some analysis on a separate thread. The BackgroundWorker is called when a user clicks a CheckBox.
I need to provide for the user clicking the CheckBox, starting the BackgroundWorker task, and then changing their mind and clicking the CheckBox again.I simply want to cancel the currently running task and set the analysis off again. Currently I have the following method:
Public Sub UpdateParkStatusAsync()
Try
'Debug output.
Console.WriteLine("UC_Map_ViewModel.UpdateParkStatus called.")
[code]....
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Jul 27, 2009
I am currently attempting to support a ClickOnce application that i did not write. This application is running from a scheduled task. The scheduled task points to a .application file. This had been running happily untill today when it stopped. The only thing that has changed is that the application has been executed manually by a developer by double clicking on the .application file. Since then each time the scheduled task is scheduled to run the application doesn't appear to execute. The task reports no error and the error code (0x0) given indicates it ran and completed ok.
I am not familiar with ClickOnce and am not sure when implication clicking the .application file would have had or why it has stopped running as a scheduled task. It appears to me that everything else has remained the same (i have checked it is running under the correct account etc).
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Apr 22, 2009
How would I Make a program that would detect running process in the taskmanger:
Info on my program
+Like I want it to load the process name's in a Rich textbox or label or textbox (if that's possible XD).
+ And I will Have a Button that once I see all the process and then the button1 will kill the processes I Pick.
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Nov 6, 2010
How would i know when a thread is completed running it's task? I mean in background worker it has a completed event, but can i make something similar to that?
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Jan 15, 2010
When i close my program its still running in the task manager, how do i close it completly ?
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Dec 19, 2010
I am running a test program for VB.NET, and it will simply crunch a million numbers in for loop. I've linked a variable implying the progress of the for loop with the progress bar, but it seems that when I run the program, the progress bar does not update itself. The bar itself has only value 0-100 as input (as stated in the document) and I've tested it without using the for loop, and it works.
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Apr 12, 2010
This code executes "handbrakecli" (a command line application) and places the output into a string:
Dim p As Process = New Process
p.StartInfo.FileName = "handbrakecli"
p.StartInfo.Arguments = "-i [source] -o [destination]"
[code].....
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Jun 7, 2011
how do i get the full path of running process in task manager.
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Jun 5, 2012
I am using Parallel.ForEach to do some time consuming operation. Coming to the question ,
For example,
I am enumerating a collection called 'TestCollection' which has 3 items.
Parallel.ForEach(TestCollection, po, AddressOf DoSomeThing) So 3 tasks will be running in paralell at a time Now I want to add another 2 items to TestCollection, while the task is running.
How to enque the additional 2 items to the 'TestCollection' so that additional two tasks will also run in paralell. Finally 5 tasks should run in paralell without stopping the running task. If a post answers your question,
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Feb 25, 2010
I need to have a windows service that capable of monitoring constantly whether my application is running or not. If not, the windows service will RUN it for me.
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Jan 13, 2012
I cannot get Excel 2010 to close by using VB on my Windows XP computer at work. I have what I thought would be able to close it, but it doesn't. I do not get any errors, it its just that after multiple times of the code running, I have multiple instances of EXCEL.EXE running in the task manager, which causes problems. I am going to post the code below:
Option Strict Off
Imports Excel = Microsoft.Office.Interop.Excel
Public Class CompareDataExcel\
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
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Jul 22, 2011
I know this code will give a list of processes
ListBox1.Items.Clear()
Dim ProcessList As System.Diagnostics.Process()
[code].....
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Dec 31, 2009
I'am trying to write a program in order to obtain a screen picture for a post review of the running window that should be periodically executed with the tasks manager.
[Code]...
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Jun 9, 2011
Being new to vb.net, how do i get a exec mod for the desktop ??
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Jun 3, 2011
So I wrote a VB.net project in Visual studio.I have a scheduled task that is set to run the program every morning at 10AM. If I use windows explorer and double click the application, it runs fine.If I open task scheduler, open the task properties, and browse to the application, then choose run, the program fails, due to Runtime exceptions.I know I have the path entered correctly, since I can debug the instance when it crashes from the task scheduler. VS2010 pulls up my source code.The exception is System.IO.FileNotFoundException, remember, it works fine when I double click the app. If attach a debugger to the process after it is executed from the task scheduler, I can then restart the debugger, and Voila!, The application runs fine.
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Jul 26, 2010
The code below is right to execute more store procedures?
Dim mySQLCommand1 As New SqlCommand("sTruncate", myConn)
Dim mySQLCommand2 As New SqlCommand("sAddress", myConn)
Dim mySQLCommand3 As New SqlCommand("sProvider", myConn)
[code]....
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Sep 25, 2009
I have a compacting subroutine which basically call for MSAccess compacting[code]...
It runs without a problem in VB 2005 IDE, no problem at all. However, when I compiled it, and build the set up, and deploy it. It throws up this exception:
"Could not load file or assembly 'Interop.JRO, Version=2.6.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified."
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Jun 17, 2011
I'm having troble getting my code to recognize the parameter for my Stored Procedure.This code below show how I select my files (commented out all other files to make sure one works first)It selects my files through the OpenFileDialog box, it loads the name & location of the csv file into memory and then I want to run a SP to import the csv into my database. I have set the SP up ok as it works through SSMS. [code]
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Oct 10, 2011
have you of any ideas in why does my software in vb 2010 still exist in the task manager (process tab), after i closed the program? i noticed it when i want to delete the .exe file.
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