Silverlight DataForm doesn't display the correct initial value

Question

I'm trying to force the DataForm to display an initial value that's different from the first of the ItemsSource list with no success.

I'm working with the MVVM patern.

I simply bind the ItemsSource to a Customers list (All customers), then bind CurrentItem to the one customer I want to be displayed as an initial item on the DataForm:

     <toolkit:DataForm Height="292"
                    HorizontalAlignment="Left"
                    ItemsSource="{Binding Path=Customers}"
                    CurrentItem="{Binding SelectedCustomer}"
                    Margin="88,122,0,0"
                    Name="customerDataForm"
                    VerticalAlignment="Top"
                    Width="342" />

And in the viewmodel I set:

  void loadOpCustomers_Completed(object sender, EventArgs e) {
     Customers = _Context.Customers;
     SelectedCustomer = Customers.Where(c => c.CustomerID == initialCustomerID).FirstOrDefault();
  }

When I debug it SelectedCustomer holds the exact customer I want, but the DataForm insists to show the first of the Customers list.

Any suggestion?

Answer 1

Add a binding mode in your XAML:

ItemsSource="{Binding Path=Customers}"
CurrentItem="{Binding SelectedCustomer,Mode=TwoWay}"

And make sure your ViewModel implements INotifyPropertyChanged.