Remember that you don’t have a parent in your control’s constructor -- it hasn’t been added anywhere yet. Use the Loaded event when you look. From there, you can use the VisualTreeHelper.GetParent() method. Sometimes you are looking for a parent of a given name or type. To help out, here’s a quick method I threw together to help you find a parent of a given type:
T GetParentOfType<T>() where T : DependencyObject
{
DependencyObject p = this;
while( p != null && !(p is T))
{
p = VisualTreeHelper.GetParent(p);
}
Read more: Arian Kulp's Site
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