How can I prevent WPF app from closing main window when opening a new window?

Question

I use this method to show another window from my main window.

 public void DisplayLobbyWindow() { var d = Application.Current.Dispatcher; if (d.CheckAccess()) { new LobbyWindow() { Owner = this }.Show(); this.Close(); } else { d.BeginInvoke((Action)DisplayLobbyWindow); } }

However, the main application closes when I show the new one. I don't want it to close, I just want to make the first window disappear and show the next one. How's that possible? Thanks.

EDIT: I guess it could be because the Owner property is set to the Main Window - however I need it to start up in the main window's location so I set the owner to it. Is there a workaround?

can't you use this.hide() instead of this.close()?

Bhaskar Shrestha
– Bhaskar Shrestha

2014-02-05 04:57:13 +00:00
Commented Feb 5, 2014 at 4:57 — Bhaskar Shrestha
– Bhaskar Shrestha, Commented Feb 5, 2014 at 4:57

Grant Winney · Accepted Answer · 2014-02-05 05:25:47Z

Modify your code to hide the window. You can also specify the startup location, since you said you want the new window to pop up where the old window was.

public void DisplayLobbyWindow() { ... new LobbyWindow() { Owner = this, WindowStartupLocation = WindowStartupLocation.CenterOwner }.Show(); this.Hide(); ... }

Then in your second form, subscribe to the Closed event:

<Window x:Class="WpfApplication1.LobbyWindow" Title="LobbyWindow" Closed="LobbyWindow_OnClosed">

So that you can display the first form again. Otherwise, the second window will display and your app will just keep running, invisible.

 private void LobbyWindow_OnClosed(object sender, EventArgs e) { Owner.Show(); }

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