How to get the screen dimensions across all monitors in WPF

I seem to be needing this code in every WPF I start at the moment, so here it is in a nice reproducable form. You need to add references to System.Windows.Forms and System.Drawing in order to do this though. Shame that dependency is required – I don’t see how getting screen information is strictly related to forms, so it’d be cool to be able to do this without requiring the System.Windows.Forms reference.

Anyway, stick this somewhere in your app (I put it in the App class and assign it to a static member):

27 private static Rect GetTotalScreenArea()

28 {

29 Rect screenArea = new Rect();

30 foreach (Screen s in Screen.AllScreens)

31 {

32 if (s.Bounds.Height > screenArea.Height)

33 screenArea.Height = s.Bounds.Height;

34

35 screenArea.Width += s.Bounds.Width;

36 }

37 return screenArea;

38 }

So my App.xaml.cs looks like this:

1 using System;

2 using System.Collections.Generic;

3 using System.Configuration;

4 using System.Data;

5 using System.Linq;

6 using System.Windows;

7 using System.Windows.Forms;

8

9 namespace MyProject

10 {

11 /// <summary>

12 /// Interaction logic for App.xaml

13 /// </summary>

14 public partial class App : Application

15 {

16 public static Rect TotalScreenArea;

17

18 protected override void OnStartup(StartupEventArgs e)

19 {

20 TotalScreenArea = GetTotalScreenArea();

21

22 base.OnStartup(e);

23 }

24

25 private static Rect GetTotalScreenArea()

26 {

27 Rect screenArea = new Rect();

28 foreach (Screen s in Screen.AllScreens)

29 {

30 if (s.Bounds.Height > screenArea.Height)

31 screenArea.Height = s.Bounds.Height;

32

33 screenArea.Width += s.Bounds.Width;

34 }

35 return screenArea;

36 }

37 }

38 }