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POUpdating progressbar from a background thread
 

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    <p>I have a progressbar and its value is binded to a property:</p> <pre><code> &lt;ProgressBar x:Name="progressBar" Margin="0,2,0,0" Height="20" Value="{Binding CompassLogLoadPercent}" Foreground="Blue" Visibility="{Binding CompassLogLoadCompleted, Converter={StaticResource BooleanToVisibilityConverter}}" ToolTip="Loading"&gt; &lt;/ProgressBar&gt; </code></pre> <p>and the property:</p> <pre><code> public double CompassLogLoadPercent { get { return _compassLogLoadPercent; } private set { if (value != _compassLogLoadPercent) { _compassLogLoadPercent = value; NotifyPropertyChanged(); } } } </code></pre> <p>and in a seperate thread its value is updated:</p> <pre><code> for (int j = 0; j &lt; lines.Count(); j++) { ... CompassLogLoadPercent = ((double) j /lines.Count())*100; } </code></pre> <p>and the thread is created using TASK:</p> <pre><code>Task.Run(() =&gt; { LoadLogFile(fileName); }); </code></pre> <p>Why is progressbar not updating and how should I fix this?</p> <p><strong>UPDATE</strong>: <em>More Info</em></p> <p>Datacontext: (Im sure that the dataContext is Correct)</p> <pre><code>cLT.progressBar.DataContext = logSession; </code></pre> <p>and implementation of <code>INotifyPropertyChanged</code></p> <pre><code> public event PropertyChangedEventHandler PropertyChanged; protected virtual void NotifyPropertyChanged( [CallerMemberName] String propertyName = "") { PropertyChangedEventHandler eventHandler = PropertyChanged; PropertyChangedEventHandler handler = PropertyChanged; if (handler != null) { handler(this, new PropertyChangedEventArgs(propertyName)); } } </code></pre>
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    1. USpersianLife
    1. USpersianLife
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    1. COYou should really use a [`Dispatcher`](http://msdn.microsoft.com/en-us/magazine/cc163328.aspx)...
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      1. USPatryk Ćwiek
    2. COYou don't show where you set your `DataContext`.
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      1. USDaniel Kelley
    3. COCheck this answer: [stackoverflow.com/questions/4621623][1] [1]: http://stackoverflow.com/questions/4621623/wpf-multithreading-ui-dispatcher-in-mvvm
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      1. USfaceman
 

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