Window.GetWindow() of TabItems content does not return the right window when TabItems State changes

Question

When using TabControl in two windows, each TabItem contains a button with a click event that displays the parent window of the TabItem using Window.GetWindow(). After DragAndDrop a TabItem from one window to another, GetWindow() still returns the previously docked window only. We have attached the sample and demo video for reference in the below mentioned link.

Link: SampleAndDemoVideo

Answer 1

Hi,@Karthick Arjunan. Welcome to Microsoft Q&A. The Window.GetWindow method is called with the button as the parameter, which correctly finds the window containing the button.

   private void Button_Click(object sender, RoutedEventArgs e)
   {
       if (sender is DependencyObject depObj)
       {
           var window = Window.GetWindow(depObj);
           MessageBox.Show(window?.ToString() ?? "Window not found");
       } 
   }

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