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POMulti BackgroundWorker
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copied!<p>I have a program with Multi BackgroundWorker. I have 2 question:<br></p> <ol> <li><p>Is It easy to the computer to create 1000 or more BackgroundWorker instance at once??<br> If not, what can I do instead??</p></li> <li><p>In the program I show the program process in a textBox. but it doesn't show immediately on the UI, just after some minutes it show all at once. It can be from 2 reasons:</p> <ol> <li>The invoke() doesn't work correctly.</li> <li>The new ProgressChangedEventHandler(ProgressChanged) doesn't work correctly. </li> </ol></li> </ol> <p><b>My code:</b></p> <p>Main code:</p> <pre><code>worker = new BackgroundWorker[dtPP.Rows.Count]; for (int i = 0; i < dtPP.Rows.Count - 1; i++) { worker[i] = new BackgroundWorker { WorkerReportsProgress = true }; worker[i].DoWork += new DoWorkEventHandler(DoWork); worker[i].ProgressChanged += new ProgressChangedEventHandler(ProgressChanged); worker[i].RunWorkerAsync(i); Thread.Sleep(1000); } </code></pre> <p>Func of worker:</p> <pre><code> void ProgressChanged(object sender, ProgressChangedEventArgs e) { Console.WriteLine(msg); } void DoWork(object sender, DoWorkEventArgs e) { string st; int i=(int)e.Argument; try { ((BackgroundWorker)worker[i]).ReportProgress(i*-1); httpDownload = new HttpDownloader(dtPP.Rows[(int)e.Argument]["pp_url"].ToString()); htmlDoc = httpDownload.GetPage(); htmlDoc = Pharsing.CreateCorrectHtmlDoc(htmlDoc); st = htmlDoc != "" ? "OK" : "Error"; ((BackgroundWorker)worker[i]).ReportProgress(i); } catch (WebException ex) { st = ex.Status.ToString(); } } </code></pre> <p>This is a class that all text in Console.WriteLine("") insert to textBox that is in the Form, because I have a winApplication program. </p> <pre><code> class cl : TextWriter { TextBox _output = null; public cl(TextBox output) { _output = output; } public override void Write(char value) { base.Write(value); _output.Invoke(new WriteDeligate(this.WriteDel), value); } public override Encoding Encoding { get { return System.Text.Encoding.UTF8; } } void WriteDel(char value) { _output.AppendText(value.ToString()); // When character data is written, append it to the text box. } public delegate void WriteDeligate(char value); } </code></pre> <p>p.s. The program create BackgroundWorker instance for each url that I want to download. and that I begin to download all the pages at almost once.</p> <p>Thank, Chani</p>

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