GetChildrenCount Method

VisualTreeHelper.GetChildrenCount Method (DependencyObject)

 

Returns the number of children that the specified visual object contains.

Namespace:   System.Windows.Media
Assembly:  PresentationCore (in PresentationCore.dll)

Public Shared Function GetChildrenCount (
	reference As DependencyObject
) As Integer

Parameters

reference
Type: System.Windows.DependencyObject

The parent visual that is referenced as a DependencyObject.

Return Value

Type: System.Int32

The number of child visuals that the parent visual contains.

Use the GetChild method to retrieve a specified child 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.
Public Shared Sub EnumVisual(ByVal myVisual As Visual)
	For i As Integer = 0 To VisualTreeHelper.GetChildrenCount(myVisual) - 1
		' Retrieve child visual at specified index value.
		Dim childVisual As Visual = CType(VisualTreeHelper.GetChild(myVisual, i), Visual)

		' Do processing of the child visual object.

		' Enumerate children of the child visual object.
		EnumVisual(childVisual)
	Next i
End Sub

.NET Framework
Available since 3.0
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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