Showing a Windows form on a secondary monitor?
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20-09-2019 - |
Question
I'm trying to set a Windows Form on secondary monitor, as follows:
private void button1_Click(object sender, EventArgs e)
{
MatrixView n = new MatrixView();
Screen[] screens = Screen.AllScreens;
setFormLocation(n, screens[1]);
n.Show();
}
private void setFormLocation(Form form, Screen screen)
{
// first method
Rectangle bounds = screen.Bounds;
form.SetBounds(bounds.X, bounds.Y, bounds.Width, bounds.Height);
// second method
//Point location = screen.Bounds.Location;
//Size size = screen.Bounds.Size;
//form.Left = location.X;
//form.Top = location.Y;
//form.Width = size.Width;
//form.Height = size.Height;
}
The properties of bounds seem correct, but in both methods I've tried, this maximizes the form on the primary monitor. Any ideas?
Solution
Try setting WindowStartUpLocation parameter as "manual" inside your SetFormLocation method.
OTHER TIPS
this.Location = Screen.AllScreens[1].WorkingArea.Location;
this is the Form reference.
@Gengi's answer is succinct and works well. If the window is maximised it does not move the window. This snippet solves that (although I suspect the windows "normal" dimensions must be smaller than the new screen dimensions for this to work):
void showOnScreen(int screenNumber)
{
Screen[] screens = Screen.AllScreens;
if (screenNumber >= 0 && screenNumber < screens.Length)
{
bool maximised = false;
if (WindowState == FormWindowState.Maximized)
{
WindowState = FormWindowState.Normal;
maximised = true;
}
Location = screens[screenNumber].WorkingArea.Location;
if (maximised)
{
WindowState = FormWindowState.Maximized;
}
}
}
Are you sure screens[1]
is your secondary? Give screens[0]
a try. Your code is basically correct.
Ok, I checked, you will have to do it after the Show():
n.Show();
setFormLocation(n, screens[1]);
which gives some unwanted flicker. But you can probably do:
n.SetBounds(-100, -100, 10, 10); // or similar
n.Show();
setFormLocation(n, screens[1]);
I used this for an XNA 4 Dual Screen Application (Full Screen XNA Game Window + WinForm)
In the Form_Load() method, place the following code:
var primaryDisplay = Screen.AllScreens.ElementAtOrDefault(0);
var extendedDisplay = Screen.AllScreens.FirstOrDefault(s => s != primaryDisplay) ?? primaryDisplay;
this.Left = extendedDisplay.WorkingArea.Left + (extendedDisplay.Bounds.Size.Width / 2) - (this.Size.Width / 2);
this.Top = extendedDisplay.WorkingArea.Top + (extendedDisplay.Bounds.Size.Height / 2) - (this.Size.Height / 2);
To display form on secondary screen:
Screen primaryFormScreen = Screen.FromControl(primaryForm);
//Use this if you are looking for secondary screen that is not primary
Screen secondaryFormScreen = Screen.AllScreens.FirstOrDefault(s => !s.Primary) ?? primaryFormScreen;
//Use this if you are looking for screen that is not being used by specific form
Screen secondaryFormScreen = Screen.AllScreens.FirstOrDefault(s => !s.Equals(primaryFormScreen)) ?? primaryFormScreen;
//Putting the form on the other screen
secondaryForm.Left = secondaryFormScreen.Bounds.Width;
secondaryForm.Top = secondaryFormScreen.Bounds.Height;
//Recommended to use, You can change it back later to the settings you wish
secondaryForm.StartPosition = FormStartPosition.Manual;
secondaryForm.Location = secondaryFormScreen.Bounds.Location;
Point p = new Point(secondaryFormScreen.Bounds.Location.X, secondaryFormScreen.Bounds.Location.Y);
secondaryForm.Location = p;
secondaryForm.Show();
If you are looking forward for a specific screen, you can loop on "Screen.AllScreens" and use the process above.
Set form Startup Position property to Manual
public void MoveWindowToProjector ()
{
Rectangle rectMonitor;
// Create New Process
Process objProcess = new Process();
//Get All the screens associated with this Monitor
Screen[] screens = Screen.AllScreens;
// Get Monitor Count
int iMonitorCount = Screen.AllScreens.Length;
// Get Parameters of Current Project
string[] parametros = Environment.GetCommandLineArgs();
// if (parametros.Length > 0)
// {
//objProcess.StartInfo.FileName = parametros[0];
// objProcess.Start();
// }
// Get Window Handle of this Form
IntPtr hWnd = this.Handle;
Thread.Sleep(1000);
if (IsProjectorMode)
{
if (iMonitorCount > 1) // If monitor Count 2 or more
{
//Get the Dimension of the monitor
rectMonitor = Screen.AllScreens[1].WorkingArea;
}
else
{
//Get the Dimension of the monitor
rectMonitor = Screen.AllScreens[0].WorkingArea;
}
}
else
{
rectMonitor = Screen.AllScreens[0].WorkingArea;
}
if (hWnd != IntPtr.Zero)
{
SetWindowPos(hWnd, 0,
rectMonitor.Left, rectMonitor.Top, rectMonitor.Width,
rectMonitor.Height, SWP_SHOWWINDOW);
}
}
Screen[] screens = Screen.AllScreens;
sc aoc = new sc();
aoc.Show();
aoc.Location = Screen.AllScreens[INDEX OF YOUR AVAILABLE SCREENS TARGET].WorkingArea.Location;
FOR MAXIMIZED WINDOW STATE
aoc.WindowState = FormWindowState.Maximized;
FOR ANY X,Y POSITION
aoc.Location = new Point(TARGET X POSITION, TARGET Y POSITION);