#109 – Navigating the Logical Tree in Code

You can use the LogicalTreeHelper.GetChildren method to traverse a logical tree and enumerate all of the objects in the tree.

Every element in a logical tree is a DependencyObject, so you pass a top-level object that derives from DependencyObject into the GetChildren method.  The method returns a collection of children of that object.

 // Enumerate each immediate child of main window.  (Does NOT descend down tree)
 foreach (Object obj in LogicalTreeHelper.GetChildren(mainWindow as DependencyObject))
     Debug.WriteLine(obj.ToString());

You could extend this example and descend down the logical tree by calling GetChildren on the children returned from the first call.

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About Sean
Software developer in the Twin Cities area, passionate about software development and sailing.

2 Responses to #109 – Navigating the Logical Tree in Code

  1. Christopher Wodarczyk says:

    Is it necessary to cast the mainWindow variable as a DependencyObject in the method call? The object should inherit from DepedencyObject indirectly as a result of being a WPF element already, right?

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