VisualTreeHelper.GetChildrenCount(DependencyObject) Method
Definition
Important
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Returns the number of children that the specified visual object contains.
public:
static int GetChildrenCount(System::Windows::DependencyObject ^ reference);
public static int GetChildrenCount (System.Windows.DependencyObject reference);
static member GetChildrenCount : System.Windows.DependencyObject -> int
Public Shared Function GetChildrenCount (reference As DependencyObject) As Integer
Parameters
- reference
- DependencyObject
The parent visual that is referenced as a DependencyObject.
Returns
The number of child visuals that the parent visual contains.
Examples
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 static 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);
}
}
' 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
Remarks
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.
Applies to
.NET
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