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    <p>I would create a <strong>public</strong> property to hold the text field and implement <a href="http://msdn.microsoft.com/en-us/library/ms743695.aspx" rel="nofollow noreferrer">INotifyPropertyChanged</a>. You can easily <a href="http://msdn.microsoft.com/en-us/library/ms750612.aspx" rel="nofollow noreferrer">bind</a> the TextBlock to the property in the xaml file.</p> <pre><code>&lt;TextBlock Text="{Binding Path=StatusText}"/&gt; </code></pre> <p>Then you just change the property and the UI will always be up to date.</p> <p>In my work projects at the moment, the class representing the Window only contains method handlers, which call the public interface of a ViewModel/Presenter class. The ViewModel contains anything the UI needs to bind to and launches any and all functions by adding jobs to the ThreadPool.</p> <p>Of course, all my projects at the moment involve batch processing so letting the ThreadPool deal with concurrency issues makes sense in my case.</p> <p><strong>Update:</strong> Can you try the properties approach again but making sure the property is public. According to <a href="http://msdn.microsoft.com/en-us/magazine/cc163299.aspx" rel="nofollow noreferrer">this page</a>, you can only bind to public properties.</p> <pre><code>Imports System.ComponentModel Partial Public Class Window1 Implements INotifyPropertyChanged Private _StatusText As String = String.Empty Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged // I think the property has to be public for binding to work Public Property StatusText() As String Get Return _StatusText End Get Set(ByVal value As String) _StatusText = value OnPropertyChanged("StatusText") End Set End Property Shadows Sub OnPropertyChanged(ByVal name As String) RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(name)) End Sub ... Sub Load() ... Cursor = Cursors.Wait StatusText = "Loading..." System.Threading.Thread.Sleep(New TimeSpan(0, 0, 3)) StatusText = String.Empty Cursor = Cursors.Arrow ... End Sub </code></pre> <p>...</p>
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    1. POCan I update WPF StatusBar text before making the user wait?
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    1. USIanGilham
    1. USIanGilham
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      1. VTDownMod
    1. COUsing binding and MVVM as you suggest is certainly a good idea, but it does not solve the problem.
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      1. UST.J.Kjaer
 

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