How to determine the screen width/height using C#

Question

I want to set the width & height of a Window dynamically based on the user screens maximum width/height. How can I determine this programmatically?

Is maximising your window not acceptable? – Lazarus Jun 08 '11 at 11:20 — Lazarus, Jun 08 '11 at 11:20
@Lazarus: No, not for the case I want to handle. – Shamim Hafiz - MSFT Jun 08 '11 at 11:25 — Shamim Hafiz - MSFT, Jun 08 '11 at 11:25

H.B. · Accepted Answer · 2011-06-08T11:33:54.673

42

For the primary screen:

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

(Note that there are also some other primary screen related properties which depend on various factors, Full* & Maximised*)

Virtual screen:

SystemParameters.VirtualScreenWidth
SystemParameters.VirtualScreenHeight

edited Jun 08 '11 at 11:33

answered Jun 08 '11 at 11:20

H.B.

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What about based on current resolution? How to get that? – Shamim Hafiz - MSFT Jun 08 '11 at 11:21
2

I would think this does use the current resolution, have you tried it? – H.B. Jun 08 '11 at 11:22
Finally an answer to this question! Does VirtualScreenWidth[Height] not get updated when the user changes scaling while the application open? On Win10 it looks like you have to restart the application for these values to get repopulated. – Hashman Jul 03 '16 at 00:32
@Hashman: Cannot tell you anything about that, don't even have a win 10 setup. – H.B. Jul 04 '16 at 15:29

score 14 · Answer 2 · edited Sep 28 '17 at 11:19

If you want the specific dimensions of the monitor your program is running on (if someone is running more than one monitor) you could also use:

var helper = new WindowInteropHelper(this); //this being the wpf form 
var currentScreen = Screen.FromHandle(helper.Handle);

This will return a screen object referencing the monitor the program is running on. From there you can use the currentScreen.Bounds.Width / Height property (for the full size) or the currentScreen.WorkingArea.Width / Height (minus task bar, etc.) depending on what you want.

score 9 · Answer 3 · answered Jun 08 '11 at 11:22

9

use Screen Object

Screen.PrimaryScreen.Bounds.Width

answered Jun 08 '11 at 11:22

DeveloperX

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score 2 · Answer 4 · answered Feb 12 '18 at 09:06

I couldn't use any of the solutions above under .NET 4.0.30319.42000 with Windows 10 Enterprise when calling it from the Ranorex Studio 8.0.1+git.8a3e1a6f, so I used the line

using WinForms = System.Windows.Forms;
[…]
                SetWindowPos(processes[0].MainWindowHandle,
                    0,
                    y,
                    x,
                    WinForms.SystemInformation.PrimaryMonitorSize.Width,
                    WinForms.SystemInformation.PrimaryMonitorSize.Height,
                    SWP.SHOWWINDOW);

Thanks buddy, I'm using Ranorex too and was trying to adapt the other answers but you've hit the nail on the head... — Ewan, Sep 15 '22 at 11:12

score 2 · Answer 5 · edited Feb 12 '18 at 09:56

2

You can use the SizeChanged event

SizeChanged="MyWindow_SizeChanged"

Then in your event handler,

private void Window_SizeChanged(object sender, SizeChangedEventArgs e)
{
    if (this.MinWidth > 0 && this.MinHeight > 0)
    {
        double heightScaleFactor = e.NewSize.Height / this.MinHeight;
        double widthScaleFactor = e.NewSize.Width / this.MinWidth;            
        mainGrid.LayoutTransform = new ScaleTransform(heightScaleFactor, widthScaleFactor);
    }
}

where MainGrid is a container for all the contents in MyWindow.

edited Feb 12 '18 at 09:56

Komal12

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answered Jun 08 '11 at 11:25

lewi

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Not sure how this addresses the question. – Lazarus Jun 08 '11 at 11:28
It is a valid post, but as Lazarus mentioned.. "it doesn't address the question" :) – Shamim Hafiz - MSFT Jun 08 '11 at 11:31

score 0 · Answer 6 · answered Nov 28 '18 at 19:53

You can get the screen height and width:

int height = System.Windows.Forms.SystemInformation.PrimaryMonitorSize.Height;
int width = System.Windows.Forms.SystemInformation.PrimaryMonitorSize.Width;

Then set the Window's Height and Width properties to those in the Initialization.

this.Height = height;
this.Width = width;

Works to get the screen's height and width in WinForms or in ASP .NET. No muss, no fuss, except you'll need to reference the System.Windows.Forms assembly in your project if it's not a WinForm project.

How to determine the screen width/height using C#

6 Answers6

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