WPF绑定不更新

Question

Using MVVM, I have a View that contains a DependencyProperty, and a ListBox that is bound to the ViewModel:

public static readonly DependencyProperty SelectedServerProperty =
    DependencyProperty.Register("SelectedServer",typeof(object),
    typeof(ServerView), new FrameworkPropertyMetadata(test));


public object SelectedServer
{
    get { return GetValue(SelectedServerProperty); }
    set { SetValue(SelectedServerProperty, value); }
}

public ServerView()
{
    SetBinding(SelectedServerProperty, "SelectedServer");
    InitializeComponent();
}

public static void test(DependancyObject sender, DependancyPropertyChangedEventArgs e)
{
    ...
}

XAML:

<ListBox ItemsSource="{Binding Servers}" DisplayMemberPath="Name" SelectedItem="{Binding SelectedServer}" />

and a ViewModel that implements INotifyPropertyChanged:

ServerModel _selectedServer;
public ServerModel SelectedServer
{
    get { return _selectedServer; }
    set 
    {
        _selectedServer = value;
        RaisePropertyChanged("SelectedServer");
    }
}

When i select an item in the list, the ViewModel is updated, but the DependencyProperty in the View stays the same. even the test event i created is not triggered. What am I doing wrong?

Answer 1

I think the SetBinding is trying to bind to a Property defined in the View and not VM. So try using the syntax

SetBinding(SelectedServerProperty, new Binding("SelectedServer"));

This would try to bind to the SelectedServer property in the VM ( DataContext of the View). Here is the link from MSDN which would help you.