Apr 192013
I’m writing a plugin in .NET that’s hosted on a windows service running in the background. There I want to display a WPF modal window that should be activated and stay on top as soon as it gets shown. This is the only way I found that worked for me:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | using System;using System.Threading;using System.Windows;using System.Windows.Automation;using System.Windows.Interop;using System.Windows.Threading;public static class UiHelper{ public static void ShowDialogInNewThread<T>(object dataContext, Action<T> onComplete) where T : Window, new() { Thread thread = new Thread(() => { SynchronizationContext.SetSynchronizationContext(new DispatcherSynchronizationContext(Dispatcher.CurrentDispatcher)); var window = new T(); window.DataContext = dataContext; window.Closed += (s, e) => Dispatcher.CurrentDispatcher.BeginInvokeShutdown(DispatcherPriority.Background); window.Show(); IntPtr handle = new WindowInteropHelper(window).Handle; AutomationElement element = AutomationElement.FromHandle(handle); if (element != null) { element.SetFocus(); } System.Windows.Threading.Dispatcher.Run(); onComplete(window); }); thread.SetApartmentState(ApartmentState.STA); thread.IsBackground = true; thread.Start(); thread.Join(); }} |