如何强制WPF绑定刷新？

private void ComboBox_Loaded(object sender, RoutedEventArgs e)
{
    ((ComboBox)sender).GetBindingExpression(ComboBox.ItemsSourceProperty)
                      .UpdateTarget();
}

INotifyCollectionChanged

ObservableCollection<T>

OnPropertyChanged(\"YourCollectionProperty\");

UpdateTarget()

((TextBox)sender).GetBindingExpression(ComboBox.TextProperty).UpdateSource();

private void ComboBox_Loaded(object sender, RoutedEventArgs e)
{
    BindingOperations.GetBindingExpressionBase((ComboBox)sender, ComboBox.ItemsSourceProperty).UpdateTarget();
}

BindingExpression.UpdateTarget()

    private void populateInCurrentScreen()
    {
        (this.FindName(\"Dets\") as Grid).Visibility = Visibility.Visible;
        this.Bindings.Update();
    }