backgroundworker

问题 Imports SpeechLib Public Class Form1 Public vox = CreateObject("sapi.spvoice") Private Sub cmdSpeak_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdSpeak.Click Dim text2 As String = "Hello , This is a Text. Hello , This is a Text." BackgroundWorker1.RunWorkerAsync() End Sub Private Sub cmdPause_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdPause.Click vox.pause() End Sub Private Sub Form1_Load(ByVal sender As Object, ByVal e As

问题 I know for a C# main program the stack size 1 MB (32-bit and any) or 4 MB (64-bit), see Why is stack size in C# exactly 1 MB? What is the default stack size of the BackgroundWorker DoWork thread? Is there a way to change the stack size of the BackgroundWorker DoWork thread beside creating another thread like the following example: private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) { Thread thread = new Thread(delegate() { // do work with larger stack size }, 8192 * 1024);

问题 I have a code that fetches tweets from a specific Twitter account using Tweetsharp library, creates instance of a custom UserControl and post tweet text to that UserControl then add it to a StackPanel . However, I have to get a lot of tweets and it seems that the application would freeze while adding user controls to the StackPanel . I tried using BackgroundWorker , but I wasn't lucky until now. My code : private readonly BackgroundWorker worker = new BackgroundWorker(); // This ( UserControl

问题 Since the ProgressChanged event handler is raised from somewhere within the DoWork event handlers, shouldn't they be called on the asynchronous operation thread, which DoWork also runs on, instead of the UI thread, and therefore require Invoke or BeginInvoke to manipulate controls? My guess is that some magic is happening within the ReportProgress method, but how does it even know, which one is the correct thread to invoke the ProgressChanged event handlers on? 回答1: When you call

问题 Does anyone know of a background job manager that works with Rails 3? I have heard of Starling and Workling but I do not see a fork for Rails 3. 回答1: I used this article to get delayed_job (a common rails 2 gem for queueing jobs to be done later) running on rails 3. The collectiveidea branch of delayed_job has rails 3 support and works great. 回答2: Are you looking for a background-job worker ? for simple usage i suggest delayed_job https://github.com/collectiveidea/delayed_job/ Resque instead

问题 Edit I suppose the proper way of forcing await to invoke the worker asynchronously is with a Task.Run, like this: await Task.Run(() => builder.Build(dlg.FileName, cts.Token, new Progress(ReportProgress))); Got some light from http://blogs.msdn.com/b/pfxteam/archive/2012/04/12/10293335.aspx. this should be easy but I'm new to async/await so bear with me. I am building a class library exposing an API with some long-running operations. In the past, I used a BackgroundWorker to deal with progress

问题 I am trying to use the .NET Backgroundworker Object in an application I am developing. All the material on the internet say that this object runs in the "background" but nowhere have I been able to confirm that this background thread indeed runs in a "low priority" mode . This question arises because in Windows (I assume) a background task can run in a 'normal' or 'below normal' or 'low' priority mode. In my application, I tried to set the priority myself inside the DoWork function by calling

问题 I have 2 kinds of C# WPF app projects: based on .NET 4.0 that I cannot migrate to .NET 4.5 based on .NET 4.0 that I can migrate to .NET 4.5 All of them should spawn 2-10 long-running (days) processes which can be cancelled and re-launched by users. I am interested to follow the best design practices. First of all, now, I am interested to disambiguate about BackgroundWorker usage though, I hope, my question should be valid about other asynchronous patterns. I see (contradicting) concurrent

问题 I want to show the hourglass cursor and disable the window while a BackgroundWorker process runs in another thread. This is what I'm doing: Private Sub MyButton_Click(...) Dim box As New AnotherWpfWindow() box.Owner = Me ... box.ShowDialog() If (box.DialogResult.GetValueOrDefault = True) Then Me.IsEnabled = False Me.Cursor = Cursors.Wait MyBackgroundWorker.RunWorkerAsync() End If End Sub Private Sub MyBackgroundWorker_RunWorkerCompleted(...) UpdateInterface() Me.IsEnabled = True Me.Cursor =

问题 I've been searching and found that a good way to perform background work and update the GUI is using background workers. However, doing this (stupid) little task (counting from 1 to 10000) it doesn't update the label content but prints to the debug! (This is just a spike solution for another project of course...) Here's the code: public partial class MainWindow : Window { BackgroundWorker bw = new BackgroundWorker(); public MainWindow() { InitializeComponent(); } private void button1_Click