Modal Dialog not showing on top of other windows

Question

I am using Window.ShowDialog() to open a modal window in my WPF (MVVM) application, but it lets me navigate to other windows using the Windows taskbar (Windows

Answer 1

I ended up using a combination of a couple of the answers here. The accepted answer was useful at first but as other people on here have pointed out setting Topmost = true means that the window is always above any other applications running. My solution was this:

var myWindow = new MyWindowType();
myWindow.Owner = Application.Current.Windows.OfType().SingleOrDefault(x => x.IsActive);

I initially used:

myWindow.Owner = Application.Current.MainWindow;

However, this method causes problems if you have three windows open like this:

MainWindow
   |
   -----> ChildWindow1

               |
               ----->  ChildWindow2

Then setting ChildWindow2.Owner = Application.Current.MainWindow will set the owner of the window to be its grandparent window, not parent window.

To speed things up, I've added it as a code snippet in Visual Studio. If you add the following to Tools --> Code Snippet Manager --> My Code Snippets:

  
    

      
      owner
    
    
      
        ().SingleOrDefault(x => x.IsActive);]]>
      
    
  

Typing 'owner' and double-tapping the tab key will add the 'Application.CurrentWindows...' part in for you automatically.