How to set WPF window position in secondary display

Question

I have two displays. I want to make a media player and I want to play video full screen on my secondary display. So I’m trying to make a media player using WPF

Here is the code so far I wrote

Screen[] _screens = Screen.AllScreens;
System.Drawing.Rectangle ractagle = _screens[1].Bounds;
//player is  my window
player.WindowState = WindowState.Maximized;
player.WindowStyle = WindowStyle.None;

player.Left = ractagle.X;
player.Top = ractagle.Y;


// MediaControl is an media elements
MediaControl.Height = ractagle.Height;
MediaControl.Width = ractagle.Width;

But somehow it’s just playing on my first display. Any kind of help is very much appreciated.

Answer 1

You need to make sure that the WindowStartupLocation is set to Manual for the form you are displaying

Otherwise nothing you do will have any effect on the position of the window.

using System.Windows.Forms;
// reference System.Drawing
//

Screen s = Screen.AllScreens[1];

System.Drawing.Rectangle r  = s.WorkingArea;
Me.Top = r.Top;
Me.Left = r.Left;

This header of the XAML of the Window I used.

<Window x:Class="MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="823" WindowStartupLocation="Manual">
    <Canvas Width="743">
        //Controls etc
    </Canvas>
</Window>

Answer 2

5 years later! But for anyone else that stumbles across this as I did ...

If you can't or do not want to add the entire System.Windows.Forms dll reference, you can use WpfScreenHelper by micdenny (search in NuGet)

  Screen screen = WpfScreenHelper.AllScreens[0];
  Left = screen.Bounds.Left;
  Top = screen.Bounds.Top;
  Width = screen.Bounds.Width;
  Height = screen.Bounds.Height;

Micdenny has ported the Windows Forms Screen helper for WPF. This is excellent when you have other WPF refs that do not play nice with Forms (Like WPF Live-Charts).