public IEnumerable<DisplayHelper> Get()
{
var device = new DisplayDevice();
device.cb = Marshal.SizeOf(device);
var list = new List<DisplayHelper>();
for (uint id = 0; NativeMethods.EnumDisplayDevices(null, id, ref device, 0); id++)
{
device.cb = Marshal.SizeOf(device);
NativeMethods.EnumDisplayDevices(device.DeviceName, 0, ref device, 0);
device.cb = Marshal.SizeOf(device);
device.cb = Marshal.SizeOf(device);
if (device.DeviceName.Trim().Length > 0)
{
var helper = new DisplayHelper
{
Id = id,
Name = device.DeviceString
};
foreach (var screen in Screen.AllScreens)
{
if (device.DeviceName.Contains(screen.DeviceName))
{
var rectangle = screen.Bounds;
helper.PositionX = rectangle.X;
helper.PositionY = rectangle.Y;
helper.Height = rectangle.Height;
helper.Width = rectangle.Width;
}
}
list.Add(helper);
}
}
return list;
}
public void For(int rotation, uint deviceId)
{
//uint deviceId = 1; // zero origin (i.e. 1 means DISPLAY2)
var displayDevice = new DisplayDevice();
var devMode = new Devmode();
displayDevice.cb = Marshal.SizeOf(displayDevice);
NativeMethods.EnumDisplayDevices(null, deviceId, ref displayDevice, 0);
if (0 != NativeMethods.EnumDisplaySettings(
displayDevice.DeviceName, NativeMethods.EnumCurrentSettings, ref devMode))
{
int temp = devMode.dmPelsHeight;
devMode.dmPelsHeight = devMode.dmPelsWidth;
devMode.dmPelsWidth = temp;
}
devMode.dmDisplayOrientation = rotation;
DisplayChange iRet = NativeMethods.ChangeDisplaySettingsEx(
displayDevice.DeviceName, ref devMode, IntPtr.Zero,
DisplaySettingsFlags.CdsUpdateregistry, IntPtr.Zero);
}
internal static extern bool EnumDisplayDevices(
string lpDevice, uint iDevNum, ref DisplayDevice lpDisplayDevice,
uint dwFlags);
internal static extern bool EnumDisplayDevices(
string lpDevice, uint iDevNum, ref DisplayDevice lpDisplayDevice,
uint dwFlags);
