Visual.GetVisualChild(Int32) Method
Definition
Important
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Returns the specified Visual in the parent VisualCollection.
protected:
virtual System::Windows::Media::Visual ^ GetVisualChild(int index);protected virtual System.Windows.Media.Visual GetVisualChild (int index);abstract member GetVisualChild : int -> System.Windows.Media.Visual
override this.GetVisualChild : int -> System.Windows.Media.VisualProtected Overridable Function GetVisualChild (index As Integer) As VisualParameters
- index
- Int32
The index of the visual object in the VisualCollection.
Returns
The child in the VisualCollection at the specified index value.
Examples
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];
}
' Provide a required override for the GetVisualChild method.
Protected Overrides Function GetVisualChild(ByVal index As Integer) As Visual
If index < 0 OrElse index >= _children.Count Then
Throw New ArgumentOutOfRangeException()
End If
Return _children(index)
End Function
Remarks
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.
Applies to
.NET