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POView not updating after a property in ViewModel is updated
 

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  1. POView not updating after a property in ViewModel is updated
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    <p>So I'm trying to implement a ListBoxItem that has a TextBlock that binds to a property in the viewmodel. But for some reason the view isn't being updated even after the viewmodel property is updated. Can anyone give me some pointers?</p> <p>In the view (xaml)</p> <pre><code>&lt;phone:Pivot HorizontalAlignment="Left" Height="748" Margin="10,10,0,0" Grid.Row="1" Title="pivot" VerticalAlignment="Top" Width="460"&gt; &lt;StackPanel x:Name="POIStackPanel" DataContext="{StaticResource POIViewModel}"&gt; &lt;ListBoxItem x:Name="SelectedPOIItem"&gt; &lt;TextBlock Text="{Binding SelectedPickupPOI.label}" /&gt; &lt;/ListBoxItem&gt; phone:PivotItem x:Name="GooglePivot" Header="Google"&gt; &lt;ListBox x:Name="GooglePOIList" ItemsSource="{Binding GooglePOICollection}" HorizontalAlignment="Left" Height="441" Width="436" SelectedItem="{Binding SelectedPickupPOI, Mode=TwoWay}" ItemTemplate="{StaticResource POIItemTemplate}" /&gt; &lt;/phone:PivotItem&gt; &lt;/StackPanel&gt; &lt;/phone:Pivot&gt; </code></pre> <p>In the viewmodel</p> <pre><code>public ObservableCollection&lt;PointOfInterest&gt; GooglePOICollection { get; private set; } public PointOfInterest SelectedPickupPOI { get { return _selectedPickupPOI; } set { _selectedPickupPOI = value; NotifyPropertyChanged("SelectedPickupPOI"); } } public PointOfInterestViewModel() { this.GooglePOICollection = = new ObservableCollection&lt;PointOfInterest&gt;(); this.SelectedPickupPOI = new PointOfInterest(); } public event PropertyChangedEventHandler PropertyChanged; protected void NotifyPropertyChanged(String propertyName) { PropertyChangedEventHandler handler = PropertyChanged; if (null != handler) { handler(this, new PropertyChangedEventArgs(propertyName)); } } </code></pre> <p>My PointOfInterest Models</p> <pre><code>public abstract class PointOfInterest : INotifyPropertyChanged { public abstract string id { get; set; } public abstract string label { get; set; } } public class GooglePOI : PointOfInterest { private string _label; public override string label { get { return _label; } set { _label = value; NotifyPropertyChanged("label"); } } } </code></pre> <p><strong>Update</strong> so I found out that if I do <code>_selectedPickupPOI.label = value.label;</code> it will update the view correctly. What am I doing wrong?</p>
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    1. COWhere do you update the property?
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      1. POView not updating after a property in ViewModel is updated
      1. USanderZubi
    2. COAre you getting it's initial value?
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      1. POView not updating after a property in ViewModel is updated
      1. USTim Griffiths
    3. COHave you tried <TextBlock Text="{Binding SelectedPOI}" /> - you are rising a property SelectedPOI and look for SelectedPOI.label in texblock.
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      1. POView not updating after a property in ViewModel is updated
      1. USRomasz
 

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