Visual.GetVisualChild Method (Int32)


Returns the specified Visual in the parent VisualCollection.

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

protected virtual Visual GetVisualChild(
	int index


Type: System.Int32

The index of the visual object in the VisualCollection.

Return Value

Type: System.Windows.Media.Visual

The child in the VisualCollection at the specified index value.

By default, a Visual has no children. Therefore, the default implementation always throws an ArgumentOutOfRangeException.

Notes to Inheritors:

A class that derives from Visual must override this method, and also the VisualChildrenCount property, for the visual tree to be enumerated correctly.

The following example defines an overridden implementation of GetVisualChild.

// Provide a required override for the GetVisualChild method.
protected override Visual GetVisualChild(int index)
    if (index < 0 || index >= _children.Count)
        throw new ArgumentOutOfRangeException();

    return _children[index];

.NET Framework
Available since 3.0
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