This isn't described very well.But, you're saying that all three methods are executing at the same time?? Congratulations! You wrote your code to launch three different BackgroundWorkers or spawned your own threads to do it!All you would have to do is create ONE BackgroundWorker and...

BackgroundWorker

multi-threading

backgroundWorker in c#

23 Jul 2013 by Pheonyx

Yes, in the same way you would use it in a windows forms or WPF application.The background worker class is not application type dependent.The background worker on MSDN[^]The example writes to form controls, instead to write to the console.

BackgroundWorker

Vb.net - search through files error ? (unauthorized exception)

3 May 2020 by Dave Kreskowiak

Quote: 'm building a small antivirus software in VB.NET. I hate to break it to you, but this is a waste of time. Antivirus is a hideously complex problem not even $Billion companies have successfully solved. Now, on to your code. Oh dear, where...

BackgroundWorker

NamedPipe between Windows Form and background worker fails

17 Jul 2012 by Sergey Alexandrovich Kryukov

Using named pipe directly is too lo-level for .NET. I mean, you could use them, but everything you are trying to do is already done for you with remoting. You could use classical remoting or self-hosted WCF. This way is quite good for your purpose but is also much more universal. The...

C++/CLI

BackgroundWorker

backgroundWorker in c#

24 Jul 2013 by Sarin VT

Yes it is possible.A sample console program with backgroundworkwr.class Program{ private static BackgroundWorker worker = new BackgroundWorker(); private event EventHandler BackgroundWorkFinished; static void Main(string[] args) { worker.DoWork +=...

BackgroundWorker

"Cross-thread operation not valid" Error on "backgroundWorker1_DoWork" Event ..!

7 Jan 2014 by Rahul VB

Hello Mam, When ever we start a form based application, the application starts on a single UI thread. Now if i perform some operation using some of its controls. Suppose, on button click, perform some calculation. If the calculation is small its okay, but as the work to be done grows,...

WinForms

BackgroundWorker

threads

"Cross-thread operation not valid" Error on "backgroundWorker1_DoWork" Event ..!

11 Jan 2014 by Alan N

Hi Jayanta,I was reading the discussion you were having with OriginalGriff and I wonder if the real problem is the poor performance of Microsoft's TableLayoutPanel. If you are having issues with redraw then enabling double buffering on the control will speed it up. I have found that on .NET...

WinForms

BackgroundWorker

threads

How do I make background worker in C# to insert data in sqlite database

7 May 2019 by Graeme_Grant

I've written an article on SQLite that shows how to work with both synchronous and asynchronous methods that should answer all of your questions: Working with SQLite in C# & VB[^]

SQLite

BackgroundWorker

how to set thread priority in c#

29 Feb 2012 by Sergey Alexandrovich Kryukov

In addition to Solution 1 and Solution 3.Of course, you can always change the priority of a thread:http://msdn.microsoft.com/en-us/library/system.threading.thread.priority.aspx[^].You can also change the priority of a process. The thing is: in almost all cases, you should not do it....

BackgroundWorker

multi-threading

Show Forms using BackgroundWorker

8 Jul 2012 by Sander Rossel

The BackgroundWorker.RunWorkerCompleted[^] runs on the main thread. If you're opening up your Form[^] on the main thread and the Load[^] or Shown[^] Event[^] takes up some time to complete then your application is waiting for the Load or Shown Event to do its work.Opening your Form on a worker...

BackgroundWorker

backgroundworker while generating pdf

10 Aug 2012 by Manfred Rudolf Bihy

In a sample on MSDN you can learn how a BackgroundWorker operates: How to: Run an Operation in the Background[^]. The DoWork and RunWorkerCompleted event handlers you'll hook up to the backgroundworker will do the brunt of the work. You'll have to make sure though that the processing and/or save...

WinForms

BackgroundWorker

Progress bar , timer, background worker not working in my windows application

12 Sep 2012 by Sushil Mate

Have you set this properties?backgroundWorker1.WorkerReportsProgress = true;backgroundWorker1.WorkerSupportsCancellation = true;

.NET

BackgroundWorker

Backgroundworker pause and resume.

6 Nov 2012 by D-Kishore

Dear Experts.In my c# windows application, i have two buttons(export and cancel).In export button i am starting one background worker-it will export database table data to the .csv file.When ever the user clicks cancel button, I am displaying the message box("cancel the operation, do...

BackgroundWorker

Trying to start a timer_tick from my backgroundworker

4 Dec 2012 by Dominic Abraham

HiIf you just want to blink the label, i think the below code is enough:private void btnStartTimer_Click(object sender, EventArgs e){ timer1.Enabled = true; timer1.Interval = 500; timer1.Start();}private void btnStopTimer_Click(object sender, EventArgs e){ ...

BackgroundWorker

Close Application after form load/backgroundworker code completes

6 Dec 2012 by BC @ CV

How about... this.Close();

C#4.0

BackgroundWorker

forms

How to avoid creating a backgroundworker per method?

28 Dec 2012 by _Noctis_

Hi guys, I'm trying to wrap my mind around this asynchronous and background worker stuff ...As a playground, i have a WPF application that searches for prime numbers.Basics are easy. Create bgw (my short for BackGroundWorker), create DoWork, RunWorkerCompleted, ProgressChanged delegates....

How to avoid creating a backgroundworker per method?

28 Dec 2012 by Sergey Alexandrovich Kryukov

Perhaps, first thing you need to understand is that the methods are completely agnostic to the thread they are executed in. Any thread can call any methods, and any method can be called in any thread. To really understand it, you should understand how all this call-and-return model really words....

C# Port Scanner with Backgroundworker

7 Jan 2013 by leprechauny

for (int currPort = firstInterval; firstInterval

ports

BackgroundWorker

C# Port Scanner with Backgroundworker

7 Jan 2013 by fjdiewornncalwe

You just need to create threadsafe calls:How to: Make Thread-Safe Calls to Windows Forms Controls[^]

ports

BackgroundWorker

backgroundWorker in c#

23 Jul 2013 by Makarand Borawake

Is it possible to use backgroundWorker in C# console application. If yes then how??

BackgroundWorker

call backgroundworker from backgroundworker c#

25 Jul 2013 by Alan N

The BackgroundWorker class can make threading simple to use because it marshals the ProgressChanged and RunWorkerCompleted events to the UI thread. BUT waiting to catch you out is the poorly documented requirement that the RunWorkerAsync method must be called from the UI thread.If...

BackgroundWorker

multi-threading

Backgroundworker pause and resume.

5 Nov 2013 by Ziee-M

lets say your thread method have a loop in wicth you are coding the data transfer from DB to File, you have to add a condtion in there to put your thread on hold.here is an exemple!//class level declaration!public AutoResetEvent autoRest = new AutoResetEvent(false);bool...

BackgroundWorker

"Cross-thread operation not valid" Error on "backgroundWorker1_DoWork" Event ..!

6 Jan 2014 by JayantaChatterjee

Hi all,I create a form which have some function perform on the form_load, at the meantime I want to show a form(like "please wait").I used Background Worker. My code is :-private void QuestionForm_Load(object sender, EventArgs e) { WP = new WorkerProgress();//here...

WinForms

BackgroundWorker

threads

BackgroundDownloader for win8.1 not working

24 Jun 2014 by Sergey Alexandrovich Kryukov

This is not a valid URL. Valid URL should start with the URI Scheme "http://" or perhaps "https://". You domain should be known to the DNS, prescribed in the DNS data.Please see:http://en.wikipedia.org/wiki/URI_scheme[^],http://en.wikipedia.org/wiki/DNS[^].—SA

how manualresetevent work ?

12 Oct 2014 by Sergey Alexandrovich Kryukov

First of all, correct question would ask about threads, not BackgroundWorker, which is just one of the ways to create a separate thread.This is not the purpose of System.Threading.EventWaitHandle (manual or auto-reset are just to options or reset; this class is derived into two classes,...

BackgroundWorker

threads

How to manage background consecutive tasks in iOS ?

14 Oct 2014 by KarstenK

Background tasks are not wanted by Apple design. You should keep that really in mind.A good tutorial is from the Ray Wenderlich.Another solution can be Notifications.

iOS

BackgroundWorker

How to call BackgroundWorker.ReportProgress in a method?

13 Nov 2014 by Michael Ulmann

Have a look at the example on MSDN:[^]You have to cast your sender argument to type BackgroundWorker:BackgroundWorker worker = sender as BackgroundWorker;Then you can pass that worker into mymethod as an argument.public void mymetod(BackgroundWorker worker){ ...

WinForms

BackgroundWorker

How to call BackgroundWorker.ReportProgress in a method?

13 Nov 2014 by BillWoodruff

There's a good tutorial here on CodeProject: [^].You will want to locate the 'while loop ... or whatever else causes multiple iterations of exceuting code ... shown in your code in the BackGroundWorker's 'DoWork EventHandler.

WinForms

BackgroundWorker

how to use the Background Worker in ASP.Net

23 Mar 2015 by F-ES Sitecore

You can only send html to the client as part of a request. Your request just kicks off the thread, the thread itself is not running as part of an http request so can't write to the client, that includes downloading the file or showing a message or updating the html in any way. Basically you...

How to populate TreeView with BackgroundWorker

30 Sep 2015 by DoomMaker79

Hi,I have a method that populates a treeview. I call this method from a listview with MouseDoubleClick. This method does all the job: reads the SQL table, generates 3 List (parent, child, grandchild) and some if... and foreach... loops builds the treeview from these lists' elements. Works...

BackgroundWorker

treeview

How to use progress bar/spinner when data is loading in datagridview?

10 Oct 2016 by Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Your answer here - c# - Progressbar for loading data to DataGridView using DataTable - Stack Overflow[^].

DataGridView

BackgroundWorker

threads

Can use background worker for heavy task?

11 Apr 2018 by OriginalGriff

A background worker is good - but it's name suggests something that isn't true: it doesn't run at a lower priority than normal threads, it is a normal thread that will be automatically closed automatically when all foreground threads have exited (so your app doesn't have to worry about cleaning...

C#4.0

ASP.NET4

BackgroundWorker

How to run function infinite time in background without hanging UI?

4 Feb 2022 by OriginalGriff

Your "small sample" of code will not work. You can't add an infinite amount of data to a Text box, Rich or not: each time you try, you create a new string which is longer than the last, and cause a Paint event to be queued on the TextBox - which...

BackgroundWorker

Task

threads

How do I insert more than one data into database using backgroundworker in C#?

16 Jan 2023 by OriginalGriff

The simplest solution is to create a new background worker each time, and pass it the data it needs to send to SQL. Me? I'd pass it a string collection and let it deal with converting it to bytes and then transfering that to the DB. If each file...

MySQL

BackgroundWorker

How to unfreeze the form using the thread or backgroundWorker

9 Jan 2012 by skilllab

Good day everyone.There is a class that performs some work:public class MyNew { private bool Initialize() { this.InitializeProgressDialog(); return true; } private void...

BackgroundWorker

threads

How to unfreeze the form using the thread or backgroundWorker

9 Jan 2012 by BobJanova

I don't really understand the question. (I'm guessing English isn't your first language? I find it hard to read what you've typed.) But the problem here appears to be that you are mixing the calculation code and display code. The code that performs the calculation (which appears to be MyNew, I...

BackgroundWorker

threads

how to set thread priority in c#

29 Feb 2012 by akul123

Thank you your response.Now I am trying to make the situation clear. private void bgwLoading_DoWork(object sender, DoWorkEventArgs e) { ArrayList a = (ArrayList)e.Argument; string[] fileNames = (string[])a[0]; bool isLoad =...

BackgroundWorker

multi-threading

Accessing a windows control from a backgroundworker

30 Mar 2012 by V.

You should be able to use the Dispatcher[^] property on that. Use the Disptachers CheckAccess() method the check how to access the control. (note CheckAccess does not appear in intellisense.)Here's a sample where the backgroundworker thread calls the SetMsg function to update the label...

BackgroundWorker

threads

Accessing a windows control from a backgroundworker

30 Mar 2012 by fjdiewornncalwe

This article explains this topic very well. You should use the search functionality on CP to see if the answers to your questions already exist. Cheers.Accessing Windows Forms Controls across Threads[^]

BackgroundWorker

threads

BackgroundWorker shows progress but main thread might need to show progress too

5 Apr 2012 by bobishkindaguy

SOLVED - PLEASE SEE COMMENTS BELOW IF YOU ARE INTERESTED IN HOW THIS WORKED OUT, SINCE IT IS A 2-PART SOLUTION, BOTH OF WHICH ARE POTENTIALLY USEFUL TO OTHERS.Often, users will go to my program's "import data" window to initiate an import of data from a file or spreadsheet to our database....

event

BackgroundWorker

delegates

Resume backgroundWorker after pause

12 Apr 2012 by Prafulla Sahu

Hi i am newbie of this .Net world so i am facing so many problem here is one of them,I want to resume my backgroundWorker after made it pause so how can i do it(In Windows Form) please help me. Thanks in Advance..

C#4.0

Windows

BackgroundWorker

Resume backgroundWorker after pause

12 Apr 2012 by Henning Dieterichs

Pause / Resume operations are realized with WaitHandles, e.g. the ManualResetEvent:ManualResetEvent continueEvent = new ManualResetEvent(true);continueEvent.WaitOne(); //This should call the background thread every then and nowcontinueEvent.Reset(); //If this is called within an...

C#4.0

Windows

BackgroundWorker

Show Forms using BackgroundWorker

7 Jul 2012 by JoThousand

Hi,My program has 'applets', so to speak, so I use a string called AppQueue to tell the BackgroundWorker what to do.I'm using the BackgroundWorker control to open new forms in the background (keeping the main application form responsive) as some of them take a long time to load.I...

BackgroundWorker

Progress bar , timer, background worker not working in my windows application

12 Sep 2012 by MAU787

hi alli have windows dot net application in which i m capturing image and displaying it in picturebox.but after capturing i am doing some processing on that image it takes some timenow i want to show progress bar at the bottom of my form until the image is displayed.i have used...

.NET

BackgroundWorker

Backgroundworker pause and resume.

6 Nov 2012 by Sergey Alexandrovich Kryukov

Not background worker, a thread, any thread. Well, Pause and Resume were deprecated as unsafe. Basically, a thread can get a thread synchronization object and get paused before releasing it. It can easily jam the whole process or some threads of it until the process is terminated by some...

BackgroundWorker

I want to show a loading icon in my wpf application when application is busy?

29 Jul 2013 by akjha16

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using...

WPF

BackgroundWorker

multi-threading

I want to show a loading icon in my wpf application when application is busy?

6 Nov 2012 by akjha16

// AMIT KUMAR JHA xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:wpfx="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit/extended" Title="Window1" Height="300" Width="500"...

WPF

BackgroundWorker

multi-threading

getting error when try to show report in Backgroundworker method

27 Nov 2012 by Dave Kreskowiak

You cannot interact with UI items from a background thread. ALL access to ANY UI items must be done on the UI thread (the thread your app started on).All of the code after and including the SalesReport sreport..." line MUST be run on the UI thread, not in the BackgroundWorker.Judging by...

WinForms

BackgroundWorker

Trying to start a timer_tick from my backgroundworker

4 Dec 2012 by Dustin Prevatt

I am attempting to use backgroundworker to call a timer that flashes a label in my windows form UI, but I am not having any luck. Here is my code. private void button1_Click(object sender, EventArgs e) { backgroundWorker1.RunWorkerAsync(); //do alot of other...

BackgroundWorker

Trying to start a timer_tick from my backgroundworker

4 Dec 2012 by Dominic Abraham

Hi Timer and Backgroundworker are running in two different threads. So you cannot simply access the timer control from Backgroundworker. Can you please try the below code:private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) { ...

BackgroundWorker

Close Application after form load/backgroundworker code completes

6 Dec 2012 by Dustin Prevatt

I have an app that is doing all of it's work in either the form_load or the backgroundworker. What I would like to do is make the application close itself once all of the work done by the backgroundworker is completed. Here is my code: private void Form1_Load(object sender, System.EventArgs...

C#4.0

BackgroundWorker

forms

C# Port Scanner with Backgroundworker

7 Jan 2013 by Tharaka MTR

Yes, you are write.this cross domain error will occur when the following lines executeresultTxt.AppendText("Port " + currPort + " open\r\n");resultTxt.AppendText("Port " + currPort + " closed\r\n");That because, you are going to access the Main Thread control within the background...

ports

BackgroundWorker

VS2008 Throw Cross Thread Message Exception

28 Jan 2013 by Dave Kreskowiak

You can NOT do ANYTHING with any user interface objects from a thread. Only the UI (startup) thread should be used to do any user interface work. If you're trying to put up a dialog of some kind, or modify a control on a form, or change a property on a control, or even call a method on a...

VS2008 Throw Cross Thread Message Exception

28 Jan 2013 by TangieTown

Changed:private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e){ MethodInvoker proginvoke = delegate { progressBar1.Value = e.ProgressPercentage; }; progressBar1.BeginInvoke(proginvoke);}to: private void...

progress bar not working with backgroundworker

12 Feb 2013 by jkhann

Hi guys,I have a server-client system going on with client commands controlling the server form. The commands are connect, disconnect, send and receive.When client wants to send data to/receive data from server (command == send/receive), there will be a progress bar (marquee style)...

BackgroundWorker

bar

progress bar not working with backgroundworker

12 Feb 2013 by srikanth pachava

instead of progress bar use can use ajax loaders (.gif) files this is easier.

BackgroundWorker

bar

progress bar not working with backgroundworker

13 Feb 2013 by Jegan Thiyagesan

Hi, Have you tried this.//disconnectpublic void SetStatusDelegate (bool state, string label);public void disconnectFlag(){ new SetStatusDelegate(SetStatus).Invoke(false, "disconnect");}//processingpublic void processingFlag(){ new...

BackgroundWorker

bar

progress bar not working with backgroundworker

13 Feb 2013 by Jegan Thiyagesan

HiThat means you are blocking the main thread. Try this:public bool startServer(){ if (_serverThread != null) { return false; } Task taskA = Task.Factory.StartNew(() => { Server _Server = null; _Server = new Server(); ...

BackgroundWorker

bar

progress bar not working with backgroundworker

14 Feb 2013 by Jegan Thiyagesan

HiHave a look at this article, http://jeremybytes.blogspot.ca/2012/05/backgroundworker-component-im-not-dead.html[^]This explains when to use background worker and when to use TPL. This article also has a link to solution similar to what you are looking...

BackgroundWorker

bar

Ayuda con programa para notificaciones

12 Mar 2013 by victor manuel de anda

Hello im making a mdi winforms application c# and i need something that every x minutes, my program makes a search in my database and if found a new record i need that a label text updates in the mdiparent. I know how to do this with a timer in the mdi parent, but i want to make it better...

WinForms

BackgroundWorker

database

Ayuda con programa para notificaciones

12 Mar 2013 by OriginalGriff

It's not trivial, but probably the best way would be to use the SqlDependancy class[^] - that is what it is designed for. When the database changes, it notifies you, rather than you querying the DB all the time.

WinForms

BackgroundWorker

database

Cancel the BackgroundWorker in WPF

27 Mar 2013 by Abhinav S

You can't directly do this. You first need to set WorkerSupportsCancellation to true.Try http://elegantcode.com/2009/07/03/wpf-multithreading-using-the-backgroundworker-and-reporting-the-progress-to-the-ui/[^].

C#4.0

WPF

BackgroundWorker

Run Two stored procedures simultaneously in the background worker

28 Mar 2013 by dmunisubbu

In my WPF application,When user click on the export button,I am exporting large data to the .CSV file.for this process i am using backgroundworker. Here its exporting fine and its take long time.At the same time i need to update Progress Bar.For this reason,i need a solution...

Windows

WPF

BackgroundWorker

Run Two stored procedures simultaneously in the background worker

28 Mar 2013 by S. M. Ahasan Habib

I think many ways you can do that.1.You can use 2 Backgroundworker instance for execute 2 different procedure.2. You can use 1 Backgroundworker which will update your progressbar another you can create a thread and run that thread as background thread. That will execute your another...

Windows

WPF

BackgroundWorker

Background separation using static BG image in Open CV

12 Jun 2013 by vijay kakani

Hi Everyone,I'm new to Open CV and present working on my project which needs background separation done with OpenCV.Two days back I configured Open CV with Visual Studio C++ 2010 and worked on small tutorials from this blog http://opencv-srf.blogspot.ie/By I am not sure about how to...

BackGroundWorker Thread issue with UI Thread

19 Jul 2013 by OriginalGriff

You can only access UI controls from the UI thread - the main thread. If you try from any other thread, you will get the exception you have seen.There are two ways to get round it:1) Use Control.Invoke to move the action back to the UI thread.2) Do the control update in the...

WPF

threads

BackgroundWorker

BackGroundWorker Thread issue with UI Thread

19 Jul 2013 by Sergey Alexandrovich Kryukov

Certain cross-threads calls are not allowed, by a number of reasons. You can easily delegate some methods to UI thread. This way, you can create an object in UI thread, and call all its methods in UI thread, but the calls are triggered in some other thread. This is the case when you call...

WPF

threads

BackgroundWorker

call backgroundworker from backgroundworker c#

24 Jul 2013 by Makarand Borawake

How to call backgroundworker from backgroundworker in c#? Also want to know about how to handle multiple thread in c#?

BackgroundWorker

multi-threading

call backgroundworker from backgroundworker c#

25 Jul 2013 by lukeer

Nothing special here. You call a BackgroundWorker from another BackgroundWorker the exact same way you would call it from the main thread: via the RunWorkerAsync()[^] method.Or use the RunWorkerAsync(object)[^] overload.The BackgroundWorker then fires its DoWork[^] event. Subscribe a...

BackgroundWorker

multi-threading

call backgroundworker from backgroundworker c#

25 Jul 2013 by OriginalGriff

A BackgroundWorker thread is just another thread: so anything you can do in a "normal" thread you can do in a BackgroundWorker (except access UI components, of course) - and that includes starting new threads.The only complexity you might find is keeping track of which thread code is in: but...

BackgroundWorker

multi-threading

call backgroundworker from backgroundworker c#

25 Jul 2013 by Winston Madiano

See this linkhttp://winstonmadiano.wordpress.com/2013/06/04/vb-net-multi-threading-using-background-worker-and-delegate/[^]C# Codeusing Microsoft.VisualBasic;using System;using System.Collections;using System.Collections.Generic;using System.Data;using...

BackgroundWorker

multi-threading

Traffic Light Simulation

18 Sep 2013 by CPallini

Quote:Is it possible to do this using C# winform?Yes, of course. However it really depends on your exact requirements.Quote:How if I use threading / background worker?You probably have to.Quote:Will it run smoothly?Again, yes, but it really depends on the requirements (e.g. graphics...

BackgroundWorker

threads

Backgroundworker and Threading

23 Sep 2013 by Sarin VT

1) Is it Possible to use multiple backgroundworkers in a single form?2) How is it different from Multithreading?3) How is it different from assigning multiple DoWorks to a single background worker?

Backgroundworker and Threading

23 Sep 2013 by Valery Possoz

Hello.I recommend you read this article:Background Thread? Let me count the ways....[^]You will find a lot of information about threading.Valery.

C# Backgroundworker nesnesi kullanırken donma

1 Oct 2013 by ncaewar

Merhaba,Bir tane backgroundworker nesnesi kullanarak form üzerinde bulunan bir treeview' e database' den veri yüklüyorum. DoWork' un yapısı,delegate void delege(object sender, System.ComponentModel.DoWorkEventArgs e);private void backgroundWorker1_DoWork(object sender,...

BackgroundWorker

C# Backgroundworker nesnesi kullanırken donma

2 Oct 2013 by OriginalGriff

I know that isn't your actual code (because it won't compile - you mispelled "delegate")And I'm not sure you want to do that anyway, because the whole idea of Invoke is to move code back onto the UI thread so you can access controls - and that means that your background worker just shifts the...

BackgroundWorker

C# Backgroundworker nesnesi kullanırken donma

2 Oct 2013 by ncaewar

Form is not responding....using System;using System;using System.Windows.Forms;namespace WindowsFormsApplication1{ public partial class Form1 : Form { public Form1() { InitializeComponent(); for (int i = 0; i

BackgroundWorker

Does anyone have a simple way of making this TreeView WinForm app multithreaded – the UI locks up.

18 Oct 2013 by OriginalGriff

Doing the Threading stuff is pretty easy - a Background worker will handle that: BackgroundWorker work = new BackgroundWorker(); work.DoWork += new DoWorkEventHandler(work_DoWork); work.ProgressChanged += new...

"Cross-thread operation not valid" Error on "backgroundWorker1_DoWork" Event ..!

10 Jan 2014 by Rahul VB

Hello Mam, look at the code below: class Class1 { static TableLayoutPanel tlp; public Class1(TableLayoutPanel TLP) { tlp = TLP; } public void doWork(object sender,DoWorkEventArgs e) { ////perform...

WinForms

BackgroundWorker

threads

Timer called from BackgroundWorker-strange problems

13 Jul 2014 by Tino Fourie

Not sure if the OP is still in need of a solution judging from what replies he got - nothing of value - and the date this question was posted.I have a similar situation while sending an email with attachments. I use a single Timer control to manage the "firing" order of my Backgroundworker...

timer

BackgroundWorker

check database connection using backgroundworker

16 Jul 2014 by Uknownymous

I already banging my head with this problem, I use backgroundWorker to check if database is OPEN and here's my code for that:Public Class Form1 Delegate Sub SetLabelText_Delegate(ByVal [Label] As Label, ByVal [text] As String) Dim sqlconnection As New SqlConnection("Data...

VS2012

BackgroundWorker

check database connection using backgroundworker

16 Jul 2014 by Pheonyx

Study your code and think logically about what you are trying to do.You do no form of polling to the database with the connection, there is nothing that truely does what you are asking for except one when the program loads. Also, I'm not sure if the "sqlconnection.State" property will get...

VS2012

BackgroundWorker

check database connection using backgroundworker

16 Jul 2014 by OriginalGriff

Well...yes. You are missing something.Look at your code and assume it works the first time.What happens the second time it is executed?Simple: the connection is open, so this test fails: If sqlconnection.State = ConnectionState.Closed ThenSo you don't do anything in your...

VS2012

BackgroundWorker

check database connection using backgroundworker

16 Jul 2014 by nilesh sawardekar

Public Class Form1 Dim lblInfo As string Dim sqlconnection As New SqlConnection("Data Source=" & My.Settings.Server & ";Initial Catalog=" & My.Settings.Database & ";Integrated Security=false;user id=" & My.Settings.Username & ";password=" & My.Settings.Password & ";Connection...

VS2012

BackgroundWorker

Error 126 while running wpf project

24 Jul 2014 by Job MK

Replace it with s_KeyboardHookHandle = SetWindowsHookEx( WH_KEYBOARD_LL, s_KeyboardDelegate, IntPtr.Zero, 0);or try this A Simple C# Global Low Level Keyboard Hook[^]

WPF

BackgroundWorker

how do this dataGridView1.Rows.Clear(); with backgroundWorker

15 Aug 2014 by 4L4K1

when I want to show a dataGridView with backgroundWorker I call showDGV("mydataGridViewname") in bw_dowork function . delegate void Dstr(string s); public void showDGV(string s) { if (Controls[s].InvokeRequired) { Dstr h = new...

C#5.0

BackgroundWorker

DataGridView

Apply text to textbox UI from another class

27 Sep 2014 by dovla091

sorry for bugging you guys with such a small problem, but I cannot find a solution. I have created one class for getting attachments from exchange server and Form for adding server configuration and textbox which I attend to use for the log output. I have added backgroundWorker to create...

C#4.0

BackgroundWorker

how to release thread is required in multiple thread ?

10 Oct 2014 by Sergey Alexandrovich Kryukov

The apparent solution could be simple. In your FIFO, store not just threads but give each thread its separate instance of System.Threading.EventWaitHandle, System.Threading.Monitor, instead of a thread instance, keep in your FIFO the record composing this instance with the EventWaitHandle or...

WinForms

BackgroundWorker

VB.NET Background Worker still freezes form.

15 Oct 2014 by hansoctantan

Hello Everyone,Can you help me with this one. Backgroundworker should make the Form responsive but my code is not doing that. Is there something wrong with the below code. Private Delegate Sub EncyptFilesDelegate()Private Sub EncyptFiles() If Me.InvokeRequired Then ...

BackgroundWorker

VB.NET Background Worker still freezes form.

15 Oct 2014 by Richard Deeming

The reason should be fairly obvious:Private Sub EncyptFiles() If Me.InvokeRequired Then Me.Invoke(New EncyptFilesDelegate(AddressOf EncyptFiles), New Object() {}) Else 'MORE CODE (Declaration, Create Folder, etc) For Each Filename As String In...

BackgroundWorker

How to call BackgroundWorker.ReportProgress in a method?

13 Nov 2014 by Member 11068876

Hi, there is any way to do something like this?public void mybw_DoWork(object sender, DoWorkEventArgs e){...while(...){ ... mymetod(); ....}....}public void mymetod() {......//Here i want to call mybw.ReportProgress, how can i do...

WinForms

BackgroundWorker

how to use the Background Worker in ASP.Net

23 Mar 2015 by PandIyan T

i wants to use the BackgroundWorker in asp.net with ajax to get the data from the data base and export it into excel. when click the start button backgound worker will start load the data from database and write into excel when process complete that excel will download. these process show to use...

update 2 progress bar while retrive data from access

30 Mar 2015 by oronsultan

i need to extract data from ms access table. the table. for example, contained 93 fields and the recordCount is 4000. now, i have 2 progress bar. one for the record count and one for the field. i need to update them while extracting the data but it wont work with backgroundworker. i'm having...

BackgroundWorker

MS-Access

update 2 progress bar while retrive data from access

31 Mar 2015 by Jaroslav Mitrovic

Hi.Try to change the Order of the Reading and the Application.DoEvents()First theApplication.DoEvents()then the Hard work ;)followed by the Progressbar Refresh.While reader.Read() dg.Rows.Add() pb.Value += 1 pb.Refresh() frmMain.lblStatusMain.Text =...

BackgroundWorker

MS-Access

How do I trace and abort backgroundworker task

7 May 2015 by Abhishek Kumar (here to help!!)

HI, I've following scenario:* I'm working on WPF application, with Nav-Frames and XAML Pages concept for navigation between pages.* On Unload of a page I've created a backgroundworker and started it asynchronously // Create a background threadBackgroundWorker m_AsyncWorker =...

WPF

BackgroundWorker

How do I trace and abort backgroundworker task

7 May 2015 by Florian Braun

to make Backgroundworker report its progress you have to call m_AsnycWorker1.ReportProgress(int percentProgress); from withing bw_Async_DoWork.To Cancel your Backgropundworker call m_AsnycWorker1.CancelAsync() from outside bw_Async_DoWork.

WPF

BackgroundWorker

Windows Phone 8.1 Silver Light application Background scheduler issue.

25 May 2015 by chintarajaramesh

Hi i implemented Windows Phone 8.1 Silver Light application Background scheduler using below link.The scheduler is working fine but when i call Async method it is not pining with server.Here this async method without background is working fine. But when i call this async method in...

Windows-Phone-8.1

BackgroundWorker

UI freeze when long process done in BackgroundWorker class.

25 Jun 2015 by JayantaChatterjee

I am created an application where create more than 700 Labels in flowLayoutPanel. the creation process done in DoWork event of BackgroundWorker Class, but when the process started then the UI freeze.I read and search all the tutorial about BackgroundWorker class and I follow the instruction,...

C#4.0

WinForms

BackgroundWorker

UI freeze when long process done in BackgroundWorker class.

26 Jun 2015 by JayantaChatterjee

Here is my final code:private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) { for (int i = 1; i

C#4.0

WinForms

BackgroundWorker