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POMVVM updating Label
 

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    <p>I know this is a frequently asked question, but I'm trying to solve it at least a week now... Read so many Threads, downloaded millions of different MVVM-Pattern-Examples and so on...</p> <p>I just want to update a stupid label in my MVVM modelview first approach:</p> <pre><code> void StartUpProcess_DoWork(object sender, DoWorkEventArgs e) { SplashWindow splash = new SplashWindow(); var ViewModel_Splash = new VM_SplashWindow(); splash.DataContext = ViewModel_Splash; splash.Topmost = true; splash.Show(); ViewModel_Splash.DoWork(); } </code></pre> <p>The complete ViewModel: </p> <pre><code>public class VM_SplashWindow:VM_Base { #region Properties private string _TextMessage; public string TextMessage { get { return _TextMessage; } set { if(_TextMessage != value) { _TextMessage = value; base.OnPropertyChanged("TextMessage"); } } } #endregion #region Methods public void DoWork() { this.TextMessage = "Initialize"; for(int aa = 0; aa &lt; 1000; aa++) { this.TextMessage = "Load Modul: " + aa.ToString(); Thread.Sleep(5); } this.TextMessage = "Done"; Thread.Sleep(1000); } #endregion } </code></pre> <p>A small piece from the base:</p> <pre><code>public abstract class VM_Base:INotifyPropertyChanged, IDisposable { #region INotifyPropertyChanged public event PropertyChangedEventHandler PropertyChanged; protected virtual void OnPropertyChanged(string propertyName) { PropertyChangedEventHandler handler = this.PropertyChanged; if (handler != null) { var e = new PropertyChangedEventArgs(propertyName); handler(this, e); } } #endregion } </code></pre> <p>And finally the view:</p> <pre><code>&lt;Label Height="28" Margin="19,0,17,15" Name="label2" VerticalAlignment="Bottom" Content="{Binding Path=TextMessage}" Foreground="White" /&gt; </code></pre> <p>If I set a initial value for the TextMessage Property in the constructor of my viewmodel, this initial value will be shown after the splash.Show() command. </p> <p>Setting the TextMessage Property in the DoWork-Method raises the onPropertyChangedEvent but unfortunately it will not update the label in the window. I don't know what I should do... I'm really looking forward for help. Many thanks in advance! </p> <p>maybe I should mention that the StartUpProcess_DoWork is running in a own STAThread</p> <p>kind regards, flo</p>
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