WPF accessing opened print dialog and close them

Question

I have a WPF application, which needs to log out user after 5 min of inactivity.

But if user open a print dialog of any page, and do not touch screen for 5 minutes, even if I log out user and clear all child elements, print dialog still stays on top of WPF form and somebody can come and continue to print what ever page user stayed.

I tried to use;

Window window = Application.Current.MainWindow;

or

FocusManager.GetFocusedElement();

but could not achieve to access to PrintDialog and close it.

Is there any way to access it and close if user did not respond to print dialog?

Answer 1

I fixed this weird problem by using

white project. http://white.codeplex.com/wikipage?title=Working%20with%20window&referringTitle=Programming%20using%20white

By using application class, I am able to access all ModalDialogs in WPF project, and close them.

  Application application = White.Core.Application.Attach(Process.GetCurrentProcess().Id);

private void dispatcherTimer_Tick(object sender, EventArgs e)
    {
        White.Core.UIItems.WindowItems.Window window = application.GetWindow("MainWindow");
        List<White.Core.UIItems.WindowItems.Window> modalWindows = window.ModalWindows();
        foreach (White.Core.UIItems.WindowItems.Window modalWindow in modalWindows)
        {
            modalWindow.Close();
        }
    }

Answer 2

You can use p/invoke for this. Use findwindow to find any window and destroywindow to close it.

https://msdn.microsoft.com/en-us/library/windows/desktop/ms633499(v=vs.85).aspx