How to show a form on current screen in C#?

Question

I want to show a new form in the same window from where it was invoked. I know a way to show this form on PrimaryScreen or Virtual Screen by code similar to as below:

MyForm.Location = Screen.PrimaryScreen.Bounds.Location;

But i want to show it on current screen. Is there a way to find out and show it on current screen?

Answer 1

I have done something like this to show my form centered to the current screen:

var screen = Screen.FromPoint(Cursor.Position);
myForm.StartPosition = FormStartPosition.Manual;
myForm.Left = screen.Bounds.Left + screen.Bounds.Width / 2 - myForm.Width / 2;
myForm.Top = screen.Bounds.Top + screen.Bounds.Height / 2 - myForm.Height / 2;

Answer 2

You can use the same technique, but instead of using the PrimaryScreen, grab the screen using Screen.FromPoint and Cursor.Position :

Screen screen = Screen.FromPoint(Cursor.Position);
MyForm.Location = screen.Bounds.Location;

Answer 3

1. Click on the Form in design mode.
2. Change the StartPosition property to CenterScreen .

This should open up the form on the active screen. Refer this for more values of StartPosition.

Answer 4

听起来您没有将 StartPosition 设置为 Manual。

Answer 5

I know this is late, but still, post my answer hope that it will help someone else. After several tries, I got this work with 3 monitors

var currentScreen = Screen.FromControl(this);
        if (!currentScreen.Primary)
        {
            var hCenter = currentScreen.Bounds.Left + (((currentScreen.Bounds.Right - currentScreen.Bounds.Left) / 2) - ((Width) / 2));

            var vCenter = (currentScreen.Bounds.Bottom / 2) - ((Height) / 2);
            StartPosition = FormStartPosition.Manual;
            Location = new Point(hCenter, vCenter);
        }
        else
        {
            CenterToScreen();
        }

Answer 6

Many years later, but no item was marked as the appropriate answer and I combined two comments to get it working (namely from Reed Copsey and Jason). I haven't tried any of the other methods described, since this worked without problem and got the Form to open on the monitor my cursor is at, as intended.

Here's my working code:

Screen screen = Screen.FromPoint(Cursor.Position);                
Application.Run(new Form1()
{ 
    StartPosition = FormStartPosition.Manual, //Summary in VS actually mentions this as needed to make use of Location
    Location = screen.Bounds.Location,
    WindowState = FormWindowState.Maximized
});

Answer 7

If you already have a parent form and want to open a new form on the same screen, give the ShowDialog method a reference to the parent form: newForm.ShowDialog(this); Without owner parameter (" this ") the new form may open on the main screen even when your parent form is on another screen.