So i have one class which starts a new class in a new background worker, and the background worker passes status messages back using the progresschanged section. When i try and and use this by typing classname.Dataworker.reportprogress(5) from a seperate class i get an error that I am using an object before definition. The examples...
I want to use a BackgroundWorker or a Thread to call a method from my windows form on a class located in my business layer. I would like the method in this business layer to be able to report its progress if anyone is listening as it may take awhile to complete. Since I may start with a BackgroundWorker and later decide to use a regular ...
Hi I have the following code: public Mainform() { ... // scheduler scheduler.DoWork += new System.ComponentModel.DoWorkEventHandler(scheduler_DoWork); scheduler.RunWorkerCompleted += new System.ComponentModel.RunWorkerCompletedEventHandler(scheduler_RunWorkerCompleted); scheduler.WorkerReportsProgress = ...
Simple question, to repeat the title: Does closing the WinForms application stops all active BackgroundWorkers? (I know that many StackOverflow's threads talk about BackgroundWorker, but none I've searched gave an explicit answer)... ...
I'm trying to load a bunch of files from a directory, and while it's loading, display a progress bar status, as well as a label that displays which file is being processed. private void FileWorker_DoWork(object sender, DoWorkEventArgs e) { for (int i = 0; i < Files.Length; i++) { Library.AddSong(Files[i]); FileWo...
I call obackgroundworker.CancelAsync(); on a background worker currently doing some work in another thread and then using while (obackgroundworker.IsBusy == true) to wait for it to finish before quitting the application (in case the user changes their mind while the thread is away processing and I want to close down cleanly) ...
Hi guys, A while ago I asked for some help about setting up a progress bar to show to the user how much progress has been made on the given set of files and folders. See here: First Attempt At Background worker. As a result I managed to get it to work but on some occasions it partially fills up and sometimes not at all. Exiting with ...
Here's my problem. I have 2 DataGridViews each on its own Tab. DGV2 (has at this moment no columns) is to be filled acc. to SelectedRow (ID) of the DGV1. I use tab_selectedindexchanged for that. I start BackgroundWorker to bind the DataSource and to manipulate DGV2 (insert certain columns, make some columns invisible, etc.). When I chang...
I was unable to find an answer to this question anywhere... What happens with the exceptions thrown in the callback method for System.Threading.Timer, (or in the event handler for System.Timers.Timer). Is the exception propagated to the thread on which the timer was created or is the exception lost? What are the side-effects of throwin...
I have a form that spawns a BackgroundWorker, that should update form's own textbox (on main thread), hence Invoke((Action) (...)); call. If in HandleClosingEvent I just do bgWorker.CancelAsync() then I get ObjectDisposedException on Invoke(...) call, understandably. But if I sit in HandleClosingEvent and wait for bgWorker to be done, th...
Hi! Please could you give me your thoughts on the following (especially if its advisable or not to do so)... Basically, I can successfully import CSV data into a datatable and then bind that datatable to a datagridview. What I would like to do now is run through some validation checks for each row in the grid. Each row will have its d...
I am trying to show a Font picker list similar to the one in Blend: Like Blend, I am seeing performance issues when the FontFamilies are not loaded in the FontCache. It seems that the penalty I am paying is the time it takes to actually render the FontFamily for the given FontSize and save it into the FontCache. Once the rendered fo...
I typically have code like this on a form: private void PerformLongRunningOperation() { BackgroundWorker worker = new BackgroundWorker(); worker.DoWork += delegate { // perform long running operation here }; worker.RunWorkerAsync(); } This means that I don't dispose the...
I made this code example which successfully uses a BackgroundWorker to advance a progress bar in a for loop. Now I'm trying to adapt it to work with the following recursive file copy method so that it shows me how far along the copying is, but the following code is giving me the error "This BackgroundWorker is currently busy and cannot ...
I'm creating a backup utility in WPF and have a general question about threading: In the method backgroundWorker.DoWork(), the statement Message2.Text = "..." gives the error "The calling thread cannot access this object because a different thread owns it.". Is there no way for me to directly access the UI thread within backgroundWorke...
I am trying to update my progressbar with the backgroundworker. Only this aint working. Here's my code: private BackgroundWorker _worker; public Form1(string[] args) { InitializeComponent(); // Backgroundworker to update the progressbar _worker = new BackgroundWorker(); _worker.WorkerReportsProgress = true; _worker...
I've got a background worker on a form and I've written some long running DB interaction in it. When I click a button on my form, the following runs: if (!bwFind.IsBusy) bwFind.RunWorkerAsync(param); Where bwFind is the BackgroundWorker and param is a DevExpress CriteriaOperator. I update a progressbar in the Progress_Changed e...
Hi there! Firstly, I know I should be using proper Threading techniques (Threadpool, BeginInvoke, etc.) to accomplish this, but thats a bit over my head currently and will call for some time to read over material and understand it (if you have any URL references for my scenario, please feel free to post it). In the interim I am using...
To play a bit with threading, delegates and backgroundworkers, I'm putting together a few small applications, I'm having a bit of trouble with one of them. I've a Windows form, with a textbox, a button and a richttext. When I press the button, the text in the textbox is used as a paramter to instantiate a class, like this: public partia...
We have an ASP.Net application that provides administrators to work with and perform operations on large sets of records. For example, we have a "Polish Data" task that an administrator can perform to clean up data for a record (e.g. reformat phone numbers, social security numbers, etc.) When performed on a small number of records, the t...