VisualTreeHelper.GetChild Method
Returns the child visual object from the specified collection index within a specified parent.
Assembly: PresentationCore (in PresentationCore.dll)
public static DependencyObject GetChild( DependencyObject reference, int childIndex )
Parameters
- reference
- Type: System.Windows.DependencyObject
The parent visual, referenced as a DependencyObject.
- childIndex
- Type: System.Int32
The index that represents the child visual that is contained by reference.
Call the GetChildrenCount method to determine the total number of child elements of a parent visual.
The value of reference can represent either a Visual or Visual3D object, which is why the common base type DependencyObject is used here as a parameter type.
The following example shows how to enumerate all the descendants of a visual object. This is a technique you might use if you are interested in serializing all the rendering information of a visual object hierarchy or are performing analysis or alternative rendering.
// Enumerate all the descendants of the visual object. static public void EnumVisual(Visual myVisual) { for (int i = 0; i < VisualTreeHelper.GetChildrenCount(myVisual); i++) { // Retrieve child visual at specified index value. Visual childVisual = (Visual)VisualTreeHelper.GetChild(myVisual, i); // Do processing of the child visual object. // Enumerate children of the child visual object. EnumVisual(childVisual); } }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
