How to get the size of the current screen in WPF?

Question

I know I can get the size of the primary screen by using

System.Windows.SystemParameters.PrimaryScreenWidth;
System.Windows.SystemParameters.PrimaryScreenHeight;

But how do I get the size of the current screen? (Multi-Screen users do not always use the primary screen and not all screens are using the same resolution, right?)

It would be nice to be able to acces the size from XAML, but doing so from code (C#) would suffice.

Answer 1

It works with

this.Width = System.Windows.SystemParameters.VirtualScreenWidth;
this.Height = System.Windows.SystemParameters.VirtualScreenHeight;

Tested on 2 monitors.

Answer 2

double screenWidth = System.Windows.SystemParameters.PrimaryScreenWidth;
double screenhight= System.Windows.SystemParameters.PrimaryScreenHeight;

Answer 3

Here budy. This will give you only the width and height of the workarea

System.Windows.SystemParameters.WorkArea.Width
System.Windows.SystemParameters.WorkArea.Height

Answer 4

Why not just use this?

var interopHelper = new WindowInteropHelper(System.Windows.Application.Current.MainWindow);
var activeScreen = Screen.FromHandle(interopHelper.Handle);

Answer 5

I created a little wrapper around the Screen from System.Windows.Forms, currently everything works... Not sure about the "device independent pixels", though.

public class WpfScreen
{
    public static IEnumerable<WpfScreen> AllScreens()
    {
        foreach (Screen screen in System.Windows.Forms.Screen.AllScreens)
        {
            yield return new WpfScreen(screen);
        }
    }

    public static WpfScreen GetScreenFrom(Window window)
    {
        WindowInteropHelper windowInteropHelper = new WindowInteropHelper(window);
        Screen screen = System.Windows.Forms.Screen.FromHandle(windowInteropHelper.Handle);
        WpfScreen wpfScreen = new WpfScreen(screen);
        return wpfScreen;
    }

    public static WpfScreen GetScreenFrom(Point point)
    {
        int x = (int) Math.Round(point.X);
        int y = (int) Math.Round(point.Y);

        // are x,y device-independent-pixels ??
        System.Drawing.Point drawingPoint = new System.Drawing.Point(x, y);
        Screen screen = System.Windows.Forms.Screen.FromPoint(drawingPoint);
        WpfScreen wpfScreen = new WpfScreen(screen);

        return wpfScreen;
    }

    public static WpfScreen Primary
    {
        get { return new WpfScreen(System.Windows.Forms.Screen.PrimaryScreen); }
    }

    private readonly Screen screen;

    internal WpfScreen(System.Windows.Forms.Screen screen)
    {
        this.screen = screen;
    }

    public Rect DeviceBounds
    {
        get { return this.GetRect(this.screen.Bounds); }
    }

    public Rect WorkingArea
    {
        get { return this.GetRect(this.screen.WorkingArea); }
    }

    private Rect GetRect(Rectangle value)
    {
        // should x, y, width, height be device-independent-pixels ??
        return new Rect
                   {
                       X = value.X,
                       Y = value.Y,
                       Width = value.Width,
                       Height = value.Height
                   };
    }

    public bool IsPrimary
    {
        get { return this.screen.Primary; }
    }

    public string DeviceName
    {
        get { return this.screen.DeviceName; }
    }
}

Answer 6

This will give you the current screen based on the top left of the window just call this.CurrentScreen() to get info on the current screen.

using System.Windows;
using System.Windows.Forms;

namespace Common.Helpers
{
    public static class WindowHelpers
     {
        public static Screen CurrentScreen(this Window window)
         {
             return Screen.FromPoint(new System.Drawing.Point((int)window.Left,(int)window.Top));
         }
     }
}