how to bind width of child element to width of parent element in silverlight

Question

I have a grid whose width is \"1*\". So the actual width decided at runtime I think. Within that grid I have another grid whose width I want to set to the runtime width of paren

Answer 1

If you are doing it in CodeBehind, this works for me. It has the added advantage that bindMe does not have to be a child of toMe:

public static void BindWidth(this FrameworkElement bindMe, FrameworkElement toMe)
{
  Binding b = new Binding();
  b.Mode = BindingMode.OneWay;
  b.Source = toMe.ActualWidth;
  bindMe.SetBinding(FrameworkElement.WidthProperty, b);
}

usage:

child.BindWidth(parent);