VisualTreeHelper Class
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Provides utility methods that can used to traverse object relationships (along child object or parent object axes) in the Silverlight visual tree.
Inheritance Hierarchy
System.Object
System.Windows.Media.VisualTreeHelper
Namespace: System.Windows.Media
Assembly: System.Windows (in System.Windows.dll)
Syntax
'Declaration
Public NotInheritable Class VisualTreeHelper
public static class VisualTreeHelper
The VisualTreeHelper type exposes the following members.
Methods
| Name | Description | |
|---|---|---|
.gif "Public method") .gif "Static member") .gif "Supported by Silverlight for Windows Phone") |
FindElementsInHostCoordinates(Point, UIElement) | Retrieves a set of objects that are located within a specified point of an object's coordinate space. |
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FindElementsInHostCoordinates(Point, Window) | Retrieves a set of objects that are located within a specified point of a window's coordinate space. |
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FindElementsInHostCoordinates(Rect, UIElement) | Retrieves a set of objects that are located within a specified Rect of an object's coordinate space. |
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FindElementsInHostCoordinates(Rect, Window) | Retrieves a set of objects that are located within a specified Rect of a window's coordinate space. |
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GetChild | Using the provided index, obtains a specific child object of the provided object by examining the visual tree. |
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GetChildrenCount | Returns the number of children that exists in an object's child collection in the visual tree. |
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GetOpenPopups() | Gets all open Popup controls. |
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GetOpenPopups(Window) | Gets all open Popup controls. |
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GetParent | Returns an object's parent object in the visual tree. |
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GetRoot | Returns an object's root object in the visual tree. |
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Remarks
A visual tree is a programming concept that is shared between WPF and Silverlight. In WPF, Visual is a class. Silverlight 5 does not expose a Visual class as an extension point, but still provides this helper class so that you can examine the visual tree structure.
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.