Silverlight中的控件是基于Xaml模板的控件树形结构，这给控件制作提供了很大的灵活性，可以组合，嵌套等。同时也给控件的查找造成了不便，Silverlight提供了VisualTreeHelper类帮助我们遍历控件树。例如我们要按照控件类型查找控件，可以采用下面的递归算法：

public class VisualTree    {        public static void FindControlByType
     
      (DependencyObject container,List
      
        ls) where T : DependencyObject        {            FindControlByType
       
        (container, null, ls);        }        public static void FindControlByType
        
         (DependencyObject container, string name,List
         
           ls) where T : DependencyObject        {            //for each child object in the container            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(container); i++)            {                //is the object of the type we are looking for?                if (VisualTreeHelper.GetChild(container, i) is T && 　　　　　　　　　　　　(VisualTreeHelper.GetChild(container, i).GetValue(FrameworkElement.NameProperty).Equals(name) || name == null))                {                    T foundControl = (T)VisualTreeHelper.GetChild(container, i);                    ls.Add(foundControl);                }                //if not, does it have children?                else if (VisualTreeHelper.GetChildrenCount(VisualTreeHelper.GetChild(container, i)) > 0)                {                    //recursively look at its children                    FindControlByType
          
           (VisualTreeHelper.GetChild(container, i), name, ls); } } } }}
          
         
        
       
      
     

调用非常简单：

List
     
       ls = new List
      
       (); VisualTree.FindControlByType
       
        (this.LinksStackPanel, ls);