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POHow to synchronize multiple background worker class in wpf?
 

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  1. POHow to synchronize multiple background worker class in wpf?
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    <p>I have implemented background worker class something similar to below sample and I want to update my UI each time the background worker is completed. </p> <pre><code> for (int i = 1; i &lt; 10; i++) { BackgroundWorker worker = new BackgroundWorker(); worker.DoWork += new DoWorkEventHandler(Worker_DoWork); worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(Worker_RunWorkerCompleted); worker.RunWorkerAsync(i); while (worker.IsBusy == true) { Thread.Sleep(100); } } </code></pre> <p>the Worker_DoWork return datarow and Worker_RunWorkerCompleted is adding returned result to data grid. but the function never reach in Worker_RunWorkerCompleted in a proper order. How could I can solve this?</p> <p><strong>EDIT:</strong></p> <p>To make it clear I am updating with more detail.</p> <pre><code> &lt;my:DataGrid x:Name="theGrid" RowHeight="30" ItemsSource="{Binding Category}" AutoGenerateColumns="True" HeadersVisibility="All" Margin="235,96.5,84,65.5"&gt; &lt;my:DataGrid.RowDetailsTemplate&gt; &lt;DataTemplate&gt; &lt;Expander&gt; &lt;my:DataGrid Height="300" ItemsSource="{Binding Products}" AutoGenerateColumns="True" HeadersVisibility="Column"&gt; &lt;/my:DataGrid&gt; &lt;/Expander&gt; &lt;/DataTemplate&gt; &lt;/my:DataGrid.RowDetailsTemplate&gt; &lt;/my:DataGrid&gt; //List of objects List&lt;Category&gt; Categories = new List&lt;Category&gt;(); private void button1_Click(object sender, RoutedEventArgs e) { for (int i = 1; i &lt; 10; i++) { BackgroundWorker worker = new BackgroundWorker(); worker.DoWork += new DoWorkEventHandler(Worker_DoWork); worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(Worker_RunWorkerCompleted); worker.RunWorkerAsync(i); while (worker.IsBusy == true) { Thread.Sleep(100); } } } void Worker_DoWork(object sender, DoWorkEventArgs e) { long i = Convert.ToInt64(e.Argument); Category cat = new Category { CategoryID = i, Name = "Category" + i }; cat.Products = new List&lt;Product&gt;(); for (long j = 1; j &lt; 10; j++) { Product p = new Product { ProductID = (i * j), Name = "Product " + (i * j).ToString() }; cat.Products.Add(p); } e.Result = cat; } void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) { Category cat = ((Category)e.Result); Categories.Add(cat); theGrid.ItemsSource = Categories; } } public class Product { public long ProductID { get; set; } public string Name { get; set; } } public class Category { public long CategoryID { get; set; } public string Name { get; set; } public List&lt;Product&gt; Products { get; set; } } </code></pre>
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    1. USChris Martin
    1. USniknowj
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      1. POHow to synchronize multiple background worker class in wpf?
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      1. VTDownMod
    1. COIt's not clear - is the code you've written running in the UI thread?
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      1. POHow to synchronize multiple background worker class in wpf?
      1. USJon Skeet
    2. COwhat do you mean by "it doesn't reach in a proper order"
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      1. POHow to synchronize multiple background worker class in wpf?
      1. USMartin Moser
    3. COI think he means, that the executing first BW and after second, it's not guranteed that the result from first comes before that one second.
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      1. POHow to synchronize multiple background worker class in wpf?
      1. USTigran
 

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