Question

How can I select a view for my viewmodel without using code behind? I want to load a ListBox with a lot of data coming from a WCF call. Using Josh Smith’s app, the view loads before the data arrives, empty. I want to receive all the data and then select the view with spinner showing progress.

// Completed Method
void _backgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    DataTemplate dataTemplate = new DataTemplate();
    //Leaderboards_All_View lb_all_view = new Leaderboards_All_View();
    CollectionViewSource collViewSrc = new CollectionViewSource();
    dataTemplate.DataType = "Leaderboards_All_View";
    List<Leaderboards_All> leaderboardList = e.Result as List<Leaderboards_All>;

    allViewModel =
    (from lbData in leaderboardList
     select new LB_Data_All_ViewModel(lbData, lb_All_ViewModel)).ToList();

    foreach (LB_Data_All_ViewModel avm in allViewModel)
    avm.PropertyChanged += this.OnLB_Data_All_ViewModelPropertyChanged;

    this.AllViewModel = new ObservableCollection<LB_Data_All_ViewModel>(allViewModel);
    this.AllViewModel.CollectionChanged += this.OnCollectionChanged;
    collViewSrc.Source = AllViewModel;
    lb_all_view.DataContext = collViewSrc;
}

Answer 1

— How can I select a view for my viewmodel without using code behind?

Define your DataTemplates in xaml (probably in a ResourceDictionary, or in the Resources of the View, like (assuming you have declared ‘vm’, the namespace containing your ViewModels and ‘vw’, the namespace containing your Views):

<DataTemplate DataType="{x:Type vm:LB_Data_All_ViewModel}">
  <vw:LB_Data_All_View />
</DataTemplate>

HTH 🙂