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7450679
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2011-09-16T21:43:13.637
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2011-09-16T21:43:13.637
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<p>You can choose between random response sequence (but parallel execution) or ordered response but in sequential mode. There is different cons and pros.</p> <pre><code>using System; using System.Net; using System.Reactive.Linq;//Rx libriary using System.Threading; using System.Windows; using System.Windows.Controls; public partial class MainPage : UserControl { private int count = 0; private int error = 0; public MainPage() { InitializeComponent(); } private void Button_Click(object sender, RoutedEventArgs e) { ThreadPool.QueueUserWorkItem(StartParallel); //ThreadPool.QueueUserWorkItem(StartSequential); } private void Update(Exception exception) { if (exception == null) Interlocked.Increment(ref count); else Interlocked.Increment(ref error); if ((count%100) == 0) { int count1 = count; Dispatcher.BeginInvoke(() => { textBox.Text = count1.ToString(); }); } } private void StartSequential(object o) { //single instance of WebClient WebClient wc = new WebClient(); var observer = Observable.FromEventPattern<DownloadStringCompletedEventArgs>(wc, "DownloadStringCompleted") .Select(newResult => new {newResult.EventArgs.Error, newResult.EventArgs.Result}); wc.DownloadStringAsync(new Uri("http://localhost:7123/SilverlightApplication2TestPage.aspx")); int i = 0; foreach (var nextValue in observer.Next()) { if (i == 10000) break; wc.DownloadStringAsync(new Uri("http://localhost:7123/SilverlightApplication2TestPage.aspx")); Update(nextValue.Error); } } private void StartParallel(object o) { for (int i = 0; i < 10000; i++) { //multiple instance of WebClient WebClient t = new WebClient(); t.DownloadStringCompleted += (x, nextValue) => Update(nextValue.Error);//order of result sequence is not guaranteed t.DownloadStringAsync(new Uri("http://localhost:7123/SilverlightApplication2TestPage.aspx")); } } } </code></pre>
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1. POMultiple async webclient calls in backgroundworker (Silverlight 4)
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1. PTAnswer
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1. USRadik
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