How to make a WPF window be on top of all other windows of my app not system wide

Question

I want my window to be on top of all other windows in my application only  If I set the TopMost property of a window  it becomes on top of all windows of all applications and I don t want that

User · Answer

Here s a way to do it  make your  topmost  window subscribe to your other windows GotFocus and LostFocus events and use the following as the event handlers   class TopMostWindow       void OtherWindow LostFocus object sender  EventArgs e                this Topmost   false             void OtherWindow GotFocus object sender  EventArgs e                this Topmost   true

User · Answer

How about htis   Private Sub ArrangeWindows Order As Window        For I As Integer   1 To Order Length -1         Order I  Owner   Order I - 1      Next End Sub

User · Answer

Simple to do it in XAML  and surprised that nobody posted this answer yet  In the following example  the Window is defined in a ResourceLibrary  notice the x Key   but you can also use this XAML binding on a standalone Page-style WPF resource     lt Window x Key  other window           Topmost   Binding Source  x Static Application Current  Path MainWindow IsActive Mode OneWay   gt       lt TextBlock Text  OTHER WINDOW    gt   lt  Window gt

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The best way is set this two events to all of windows of your app   GotKeyboardFocus LostKeyboardFocus   in this way   WiondowOfMyApp GotKeyboardFocus object sender  System Windows Input KeyboardFocusChangedEventArgs e        windowThatShouldBeTopMost TopMost   true     WiondowOfMyApp LostKeyboardFocus object sender  System Windows Input KeyboardFocusChangedEventArgs e        windowThatShouldBeTopMost TopMost   false       and surely all of the windows that you wanted to be top  should be accessible from other windows of your app  in my case I have a base window and another some windows that should be top of my base window  so this was not bad to my base window has instance of each another windows

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I too faced the same problem and followed Google to this question  Recently I found the following worked for me   CustomWindow cw   new CustomWindow    cw Owner   this  cw ShowDialog

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Just learning C  and ran across similar situation  but found a solution that I think may help  You may have figured this a long time ago   this will be from starting a new project but you can use it in any   1  Start new project   2  go to Project  then New Windows form  then select Windows Form and name Splash   3  set size  background  text  etc as desired   4  Under Properties of the Splash cs form set Start Position  CenterScreen and TopMost  true  5  form1 add  using System Threading    6  form1 under class add  Splash splashscreen   new Splash      7  form1 add  splashscreen Show     and  Application DoEvents      8  form1 Under Events  Focus  Activated add  Thread Sleep 4000   splashscreen Close      9  Splash cs add under  Public Splash  add  this BackColor   Color Aqua    can use any color  10  This is the code for Form1 cs  public partial class Form1   Form       Splash splashscreen   new Splash        public Form1                 InitializeComponent            splashscreen Show            Application DoEvents                private void Form1 Activated object sender  EventArgs e                Thread Sleep 4000           splashscreen Close              11  this is the code on Splash cs  public partial class Splash   Form       public Splash                 InitializeComponent            this BackColor   Color Aqua            12  I found that if you do NOT do something in the splash then the screen will not stay on the top for the time the first form needs to activate   The Thread count will disappear the splash after x seconds  so your program is normal

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I just ran into the same problem and found trouble setting the owner using MVVM without causing the app to crash in production   I have a Window Manager View Model that includes a command to open a window using the uri of the window - and I wasn t able to set the owner to App MainWindow without the app crashing   So - Instead of setting the owner  I bound the TopMost property of the window to a property in my Window Manager View model which indicates whether the application is currently active   If the application is active  the window is on top as I would like   If it is not active  other windows can cover it   Here is what I added to my View Model    public class WindowManagerVM   GalaSoft MvvmLight ViewModelBase               public WindowManagerVM                         App Current Activated     s  e    gt  IsAppActive   true              App Current Deactivated     s  e    gt  IsAppActive   false                     private bool  isAppActive   true          public bool IsAppActive                       get   gt   isAppActive              set                               if   isAppActive    value                                         isAppActive   value                      RaisePropertyChanged      gt  IsAppActive                                                     Here is the XAML that implements it  I use MVVM light with a ViewModelLocator as a static resource in my app called Locator     lt Window Topmost   Binding WindowManager IsAppActive  Source  StaticResource Locator     gt

User · Answer

Instead you can use a Popup that will be TopMost always  decorate it similar to a Window and to attach it completely with your Application handle the LocationChanged event of your main Window and set IsOpen property of Popup to false  Edit  I hope you want something like this      Window1 window       private void Button Click object sender  RoutedEventArgs e                window   new Window1            window WindowStartupLocation   WindowStartupLocation CenterScreen          window Topmost   true          this LocationChanged  OnLocationchanged          window Show                    private void OnLocationchanged object sender  EventArgs e                  if window  null                window Close           Hope it helps

User · Answer

use the Activate   method  This attempts to bring the window to the foreground and activate it  e g  Window wnd   new xyz    wnd Activate

User · Answer

Try this   Popup PlacementTarget   sender as UIElement

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You need to set the owner property of the window   You can show a window via showdialog in order to block your main window  or you can show it normal and have it ontop of the owner without blocking the owner   here is a codeexample of the codebehind part - I left out all obvious stuff   namespace StackoverflowExample     public partial class MainWindow   Window         public MainWindow               InitializeComponent              void NewWindowAsDialog object sender  RoutedEventArgs e              Window myOwnedDialog   new Window          myOwnedDialog Owner   this        myOwnedDialog ShowDialog              void NormalNewWindow object sender  RoutedEventArgs e              Window myOwnedWindow   new Window          myOwnedWindow Owner   this        myOwnedWindow Show

User · Answer

You can add this to your windows tags  WindowStartupLocation  CenterScreen    Then you can also display it if you want your users to acknowledge it in order to proceed   YourWindow ShowDialog      First try it without TopMost parameters and see the results

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There are several threads  there s even a  topmost  tag  Search on that  or go directly to this post which looks good   How to keep a window on top of all other windows in my application only

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I ran into a very similar situation as you  Most of the searches I came across stated all I needed to do was set the Owner of the windows I wish to be Topmost to the main window or whatever window that called Show    Anyways  I ll go ahead and post a solution that worked well for me      I created event handlers for Window Activated and Window Deactived in the window that was supposed to be Topmost with respect to my application    private void Window Activated object sender  EventArgs e        Topmost   true     private void Window Deactived object sender  EventArgs e        if Owner    null    Owner IsActive          return      bool hasActiveWindow   false      foreach Window ownedWindow in Owner OwnedWindows                if ownedWindow IsActive              hasActiveWindow   true              if  hasActiveWindow          Topmost   false      It works great for me   Hopefully this is useful to someone else out there   o

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I m the OP  After some research and testing  the answer is    No  there is no way to do exactly that

User · Answer

In the popup window  overloads the method Show   with a parameter   Public Overloads Sub Show Caller As Window      Me Owner   Caller     MyBase Show   End Sub   Then in the Main window  call your overloaded method Show     Dim Popup As PopupWindow  Popup   New PopupWindow Popup Show Me

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I just ran into this same issue  I have a desktop app that has multiple WPF windows  and I needed my custom splash screen to be on top of the other windows in my app only  No other windows are open when my splash screen comes up  but I do open the MainWindow from my splash screen after some authentication  So I just did something similar to what  GlenSlayden did but in code behind since  like I said  the MainWindow isn t up for me to bind to   private void SplashScreen ContentRendered object sender  EventArgs e           User authentication                    MainWindow mainWindow   new MainWindow        SetBinding SplashScreen TopmostProperty  new Binding  IsVisible                  Source   mainWindow          Mode   BindingMode OneWay          UpdateSourceTrigger   UpdateSourceTrigger PropertyChanged            mainWindow Show        Now while my program is loading all the other windows from the MainWindow  the splash screen is on top  but while the program is authenticating the user  it s not topmost  so you can click away on some other program and it will hide behind it  It s the closest thing I could find to a solution for this problem  It s not perfect because it still goes over top of all other applications while my program is loading after authentication  but that s not for very long in my case

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This is what helped me   Window selector   new Window     selector Show    selector Activate    selector Topmost   true

User · Answer

CustomWindow cw   new CustomWindow     cw Owner   Application Current MainWindow   cw ShowInTaskbar   false   cw ShowDialog

[c#] How to make a WPF window be on top of all other windows of my app (not system wide)?

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