Make Threadsqueued To Threadpool Execute Sequentially?
Sep 13, 2011
Learning about threads at the moment, barely managing to wrap my head around it, anyway I was wondering how you would go about making threads run sequentially from threadpool if you added them with
threadpool.queueuserworkitem()
In my code currently I know it is not running sequentially as I set it up to call a function and print a number each call. I gather this could be achieved with using synch lock but not quite sure how.
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Jun 4, 2011
I m trying to move all my drive's files into h drive firstly i have added all drives in threadpool for scanning and when scanning of any drive finish (Without waiting for other drive's complete ) it will move file's to h drive but it is not working as i wanted that's why i need two threadpool - one threadpool for scanning files and second threadpool for moving file's into drive's
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Oct 7, 2010
about execute a program, what do I have to do in order I can make the program run on any other computer. I have a program on a floppy disk, and I have a copy on my desktop. when I run the program on my desktop it always say "File not found", when I put the floppy disk it's working fine. So, is there anything I can do, to make it run on any other desktop without saying "File not found"
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Aug 8, 2009
I'm just writing a quick program that will ping servers on my network and display the results back to me by changing the color of the Server (item) in a listview control.
[code]...
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Jun 6, 2012
How to make a procedure to be executed only once when an application is installed freshly.
I mean if my application is installed, i want to execute a procedure only one time at the first use of the application.
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May 23, 2010
I have a database in MS SQL Server 2008, I have Stored Procedures. One of them does an INSERT with parameters. It works in Server Management Studio.Now I'd like to make a button in Visual Basic 2008 that executes this SP. I have made a DataSet, it contains my 3 SP's, I can easily use 2 of them, because they return data, but the one I'm having trouble with doesn't. Could anyone please tell me how to make VB to execute it? (The command should look like this: "EXECUTE SP2 a, b, c, d".)
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Nov 4, 2011
How can I Declare a groop of sequentially named Labels?[code]...
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Oct 14, 2010
I am using a variation of Stanav's example from the previous post seen in Sub dd_Inhoud_Labels. The first 3 Subs (Add_Titel_Label, Add_Byskrif_Label & Add_Lewering_Label) is allso shown below so you can see what I am leading up to. Sub Add_Inhoud_Labels is not only responsible for creating labels but allso placing them acording to the location and size of the previos label and allso ather properties as Font and so on depending on the marker at the start of the text string saved in the data base.The problem I can not get solved is that only the last of the Inhoud Labels seem to be created, it seem to be in the correct location as last label as seen in the pic below
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Mar 1, 2012
I have an application that downloads about 19,000 records from a SQL table and I need to step through all the records doing a calculation on each then create a new Excel workbook with the data.
[Code]
m_rows does accurately report that the number of records in the datatable is the same as in the SQL table. I can add records to the XLS file with a for/next loop but they are all the first record of the datatable. So now that I have the data, how do I go through each record sequentially?
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Jun 8, 2011
how to make the timer automatic execute a code weekly?The timer will automatic generate a report for every monday(8am),how 2 do it?
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Dec 11, 2009
Can I make a menu item to execute 3 tasks? For instance when I select a file from a ListBox and I press ToolStripMenuItem1, the program will move the selected file to a directory, execute archive.bat file and the move the archived file to another directory? I tried but I can make only one operation - to move the file.
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Aug 4, 2006
How do I make a subroutine (LoadIntro()) execute on another thread?
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Jul 7, 2010
Public Class Customer
Private m_CID As Integer
Private m_FirstName As String
[Code].....
My question is that do I need to add an OID in customer class or I can directly send a query to customer table when ever an order is made.
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Jul 26, 2010
I want to rearrange a list of items in different orders for few times; ie: the 2nd in the list becomes the 1st & the previous 3rd becomes the 2nd, ... then the Last one becomes the penultimate one.In the next round, the 3rd of the original list becomes the 1st & the 4th of the original becomes the 2nd and so on. (That is, each item moves one rank above & the Top one goes to the Bottom)Given below is an example.Here, I took only 6 items & rearranged for 5 times only. (I should be able to use several Items and to rearrange for many times).The Original List:
(1) Alpha, (2) Beta, (3) Gamma, (4) Delta, (5) Epsilon, (6) Zeta
2nd List:
(1) Beta, (2) Gamma, (3) Delta, (4) Epsilon, (5) Zeta, (6) Alpha
[code].....
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May 27, 2011
I have an object that looks like follows:
Public Class MyObject
Public Property Key as Intger
get 'Elided for clarity
[code].....
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Mar 10, 2012
I am getting data from an SQL Server Database to display into text boxes.
However I also tried getting individual data or current data to display in the Gridview but not working. I am sure I am not doing it right.
I can get the data to display in the Grid view but not individually or scroll through as I hit the next button.[code....
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Jan 10, 2010
Is there any way using existing .NET framework classes/methods that you can sequentially read a byte array? I dont mean just using a for loop to loop through from the beginning to the end, I mean having the kind of methods that you have when working with an IO.Stream subclass, such as ReadByte. I thought I would just be able to construct a new IO.Stream class and pass it in a byte array but it seems that Stream is just for inheriting and cannot actually be used itself. I could implement my own class that just has an internal position counter and a byte array and then each time you call ReadByte on that it advances the position and returns the byte at that index... but it seems odd to have to implement such a basic thing myself.
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May 25, 2012
How to change listview row colour sequentially?
[Code]...
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Dec 11, 2009
Can I make a menu item to execute 3 tasks?For instance when I select a file from a ListBox and I press ToolStripMenuItem1, the program will move the selected file to a directory, execute archive.bat file and the move the archived file to another directory?Hmmm... I tried but I can make only one operation - to move the file. Can someone post a helping code or something?
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Jun 9, 2011
i wan set a timer in my program to execute a certain function daily,weekly or monthly(which will decide by the user)!User also can execute manually the certain function at anytime!any1 can teach me how 2 do these 2 function in my program?
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Apr 11, 2011
I am using VB 2008,I am trying to make a launcher my private server but, I failed it always say 'This exe can't execute independent" I tried these method
Shell ("Game.Exe") And System.Diagnostics.Process.Start("Game.exe")
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Apr 7, 2011
1-I have three user controls.
2-I added them to AJAX TabContainer on my default.aspx page
<asp:TabContainer ID="TabContainer1" runat="server">
<asp:TabPanel runat="server" ID="GroupOne">
<HeaderTemplate>
[Code]....
so how can i execute that sub when i click on the image button in the user-control??
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Jul 8, 2011
make a Image-button in the user control execute code in the defaultpage.aspx?
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Nov 22, 2010
I am trying to make a blackjack program and I need to execute a different piece of code each time a button is pressed by the user.
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Jan 1, 2010
how this is written in VB.NET? This was an example I found on [URL]
ThreadPool.QueueUserWorkItem(delegate
{
var channelFactory = new ChannelFactory<ISimpleService>("*");
var simpleService = channelFactory.CreateChannel();
var asyncResult = simpleService.BeginGetGreeting("Daniel", null, null);
[code]....
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Jun 26, 2011
i have this code which i run with queued 10,000, even when a max of 50 is set but the threadpool counts goes to high.
Public Sub DoWork(ByVal objItem As Object)
Dim objUrl as String = DirectCast(objItem, string)
Try
If objUrl Is Nothing Then
[code]....
EDIT:i use a this code to check the number of runing threads each second
Sub Timer1Tick(sender As Object, e As EventArgs)
tsslthreads.Text=string.Format ("Threads: {0}", Process.GetCurrentProcess().Threads.Count)
End Sub
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Jun 12, 2009
I have a bunch of operations that need to be executed simultaneously. For this I'm using the thread pool to execute the tasks. I'd like to know if it's possible to consume some sort of Async Callback (similar to BackgroundWorker.DoWorkComplete) when each thread is finished. The reasoning behind this is that I have a windows service running that uses IPC to update a GUI and I need to know the time at which each specific thread finishes I've used background workers to do a set of tasks and they work perfectly, however, they take longer than I would like. I've timed the execution on my BGW method for a designated number of said tasks and it took 27 seconds, and the same set of tasks takes 4 seconds using the threadpool method. I've also tried using managed threads, to the same effect as the background workers.
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Jan 11, 2009
I'm currently writing an application that is used to automate a certain task. Currently, it uses the threadpool (using up to 25 threads per the enduser's option). Each thread calls a function which will usually take about two minutes to finish, but it uses a While loop in order to repeat the process. This is my code to start the threads:
Private Sub ProcessAllItems()
For i As Integer = 1 To Me.numThreads.Value Step 1
Threading.ThreadPool.QueueUserWorkItem(New Threading.WaitCallback(AddressOf ProcessItem), i)
Next i
End Sub
The function "ProcessItem()" is the function that contains the While loop. The control "Me.numThreads" is a NumericUpDown control whose max value is set to 25. My question is...is this a good method to follow? To my knowledge after .NET Framework SP1 there is a max of 250 threads/CPU. However I've read the the threadpool is normally used for processing short-lived tasks. Should I be using background workers instead? If so, how could I start up to 25 background workers during runtime depending on the value of "Me.numThreads"?
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Jul 2, 2009
currently i am using a threadpool that contain a number of thread. This number of thread can be different everytime, sometimes 5, sometimes 10, sometimes 15 and so on (multiple of 5). So now i have it working good by using for loop to queue the thread into threadpool. Now the problems is i do not know how to make the progress bar depending on my threadpool. I want my progress bar to complete only when all the thread are done. After searching google, i found that maybe it can be solve by using AutoResetEvent(false), but after i apply to my program, it still did not work, my program hang at xEvent.WaitOne() method and didnt proceed further, anyone can explain to me how to solve the problem? Or got any other ways? For your information, only 5 threads can be running at the same time as the requirement state so (so i set the setmaxthread to 5 already).
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Mar 15, 2011
anybody familiar with these error? "There were not enough free threads in the ThreadPool object to complete the operation".im calling a web service in my windows application client.
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