Screen.PrimaryScreen.WorkingArea is not giving full screen?

Sean Huang 1

I am trying to make an Windows form app that will auto scale to full screen. The problem is that I do not want to make it full screen if it is less than 1680x1050. So I tried to use Screen.PrimaryScreen.WorkingArea.Width / Height to get the resolution.

But although I am using a 1440p monitor, the returned value by the code :

if (!(size.Width >= 1680 && size.Height >= 1050))
            {
  Console.WriteLine((int)(size.Width));
  Console.WriteLine(size.Height);
  size.Width = 800;
  size.Height = 600;
  Console.WriteLine("the reso is too small");
            }

are:
960
1707
the reso is too small

Is this how the WorkingArea should be located, at some centralized area instead of the full screen?

1 answer

DaisyTian-1203 11,631 Reputation points

2020-06-19T01:47:46.99+00:00
The property "WorkingArea" is used to get the working area of the display. The working area is the desktop area of the display, excluding taskbars, docked windows, and docked tool bars. If you want to get the resolution, you can use property "Bounds".

int SH = Screen.PrimaryScreen.Bounds.Height; int SW = Screen.PrimaryScreen.Bounds.Width;
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Sean Huang 1 Reputation point

2020-06-22T02:37:37.31+00:00

Thanks for replying ! But that is not working either, it is giving the same results. Also I saw some people say if I can hide the tool bar WorkingArea will be the full screen, so I activated windows to hide the tool bar, before I asked the question.
This is the code before the program enter the function that contains the code I posted in the question:

Size size = new Size(Screen.PrimaryScreen.Bounds.Height, Screen.PrimaryScreen.Bounds.Width); this.ChangeLayoutSize(size);

ChangeLayoutSize(Size size) has previous lines of code.

Viorel 119.6K Reputation points

2020-06-22T03:05:39.91+00:00

I think that you should change the order of arguments, passed to Size constructor.

Which values do you see in this experiment:

Console.WriteLine( Screen.PrimaryScreen.WorkingArea );
Console.WriteLine( Screen.PrimaryScreen.Bounds )?

Sean Huang 1 Reputation point

2020-06-23T01:47:28.76+00:00

They are giving the same value as :
{X=0,Y=0,Width=1707,Height=960}

But I figured out why it is behaving in this way.
In display settings, I put the custom scaling factor(the one in advanced setting works too)
to150%. And visual studio somehow decided to make the
resolution shown as 1.5 times smaller. I changed it to 100% and
the results from your lines are:
{X=0,Y=0,Width=2560,Height=1440}
{X=0,Y=0,Width=2560,Height=1440}

However, I am still struggling to let my form to find out this scaling factor,
is there a way for this?

Sean Huang 1 Reputation point

2020-06-24T12:18:51.097+00:00

Find a really good post here:
https://stackoverflow.com/questions/5977445/how-to-get-windows-display-settings
The second question is a life saver.
And then I can use this factor to calculate the actual display reso.
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Screen.PrimaryScreen.WorkingArea is not giving full screen?

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