private static void OnAttachedDataContextChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs eventArgs)
{
FrameworkElement element = (FrameworkElement)dependencyObject;
// Copy new DataContext to MultiBindings.
MultiBindings multiBindings = GetMultiBindings(element);
multiBindings.SetDataContext(element.DataContext);
}
/// <summary>
/// Sets the value of the <strong>MultiBindings</strong> attached property to a given
/// <see cref="DependencyObject"/> object.
/// </summary>
/// <param name="obj">The object on which to set the property value.</param>
/// <param name="value">The property value to set.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="obj"/> is <see langword="null"/>.
/// </exception>
public static void SetMultiBindings(DependencyObject obj, MultiBindings value)
{
if (obj == null)
{
throw new ArgumentNullException("obj");
}
obj.SetValue(MultiBindingsProperty, value);
}
private static void OnMultiBindingsChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs eventArgs)
{
FrameworkElement element = (FrameworkElement)dependencyObject;
// Bind element.DataContext to our attached property.
// This allows us to get property changed callbacks when element.DataContext changes
element.SetBinding(AttachedDataContextProperty, new Binding());
MultiBindings bindings = GetMultiBindings(element);
bindings.Initialize(element);
}