WPF ListView SelectedValue not being set

Question

I've looked at a few solutions but nothing has worked yet for me.

I'm using MVVM for this project and have a ListView that I can't set the SelectedItem property.

If this is my (simplified) XAML.

<ListView Name="uxPackageGroups" ItemsSource="{Binding Path=PackageGroups, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}" BorderThickness="0"
      BorderBrush="#FF0000E8" ScrollViewer.CanContentScroll="True"
      SelectedItem="{Binding Path=PackageGroupSelectedItem, Mode=TwoWay}" >
<ListView.ItemTemplate>
    <DataTemplate>
       <Label Content="{Binding Name}" Height="20" Margin="0" Padding="0"/>
    </DataTemplate>
</ListView.ItemTemplate>

And I bind it to a PackageGroups in my ViewModel

   public PackageGroup PackageGroupSelectedItem {get; set; }
   public ObservableCollection<PackageGroup> PackageGroups {get; set; }

   private void LoadUI()
   {
        PackageGroups = Factory.LoadAllPackageGroups())

        // if I try to hard-code a pre-selected item here it doesn't work.
        // 34 is a valid ID and I see a valid object when stepping through the code

        PackageGroupSelectedItem = PackageGroup.LoadByID(db, 34);
   }

Anything glaring in my code?

Thanks.

Answer 1

One possible problem is that you're not implementing INotifyPropertyChanged in the PackageGroupSelectedItem property.