//Sets the dictionary for display device
public void SetupDisplay()
{
if (displayAndSettings == null)
{
displayAndSettings = new Dictionary <DisplayDevice, List <DevMode> >();
}
else
{
displayAndSettings.Clear();
}
if (devices == null)
{
devices = new List <DisplayDevice>();
}
else
{
devices.Clear();
}
bool error = false;
//Here I am listing all DisplayDevices (Monitors)
for (int devId = 0; !error; devId++)
{
try
{
DisplayDevice device = new DisplayDevice();
device.cb = Marshal.SizeOf(typeof(DisplayDevice));
//Gets list of display devies (can include printers)
error = NativeMethods.EnumDisplayDevicesW(null, devId, ref device, 0) == 0;
DisplayDevice monitorName = device;//.Clone();
error = NativeMethods.EnumDisplayDevicesW(monitorName.DeviceName, 0, ref monitorName, 0) == 0;
if (error != true)
{
device.DeviceString = monitorName.DeviceString;
devices.Add(device);
}
}
catch (Exception)
{
error = true;
}
}
List <DisplaySet> devicesAndModes = new List <DisplaySet>();
foreach (var device in devices)
{
var error1 = false;
error = false;
for (int i = 0; !error; i++)
{
try
{
DevMode mode = new DevMode();
//-1 get's the current display setting
var result = NativeMethods.EnumDisplaySettings(device.DeviceName, -1 + i, ref mode);
error = result == 0;
if (!error)
{
//Adds new device to display and settings if not already included
if (!displayAndSettings.Keys.Contains(device))
{
displayAndSettings.Add(device, new List <DevMode>());
}
//Checks if Screen Resolution, Refresh rate and bits per pixel are already contained within the list to remove duplicates that can show up
if (!displayAndSettings[device].Where(m => m.dmPelsWidth == mode.dmPelsWidth && m.dmPelsHeight == mode.dmPelsHeight && m.dmDeviceName == mode.dmDeviceName && m.dmDisplayFrequency == mode.dmDisplayFrequency && m.dmBitsPerPel == mode.dmBitsPerPel).Any())
{
Console.WriteLine(string.Format("{0}: {1}x{2} {3}hz", device.DeviceName, mode.dmPelsWidth, mode.dmPelsHeight, mode.dmDisplayFrequency));
displayAndSettings[device].Add(mode);
}
}
if (!error1)
{
error1 = true;
error = false;
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
error = false;
}
}
}
}
internal static extern ReturnCodes ChangeDisplaySettingsExW(string lpszDeviceName, ref DevMode lpDevMode, object hwnd, int dwFlags, object lParam);
internal static extern ReturnCodes ChangeDisplaySettingsEx(string lpszDeviceName, ref DevMode lpDevMode, IntPtr hwnd, int dwflags, IntPtr lParam);
internal static extern ReturnCodes ChangeDisplaySettings(ref DevMode lpDevMode, int dwFlags);
internal static extern int EnumDisplaySettingsW(string lpszDeviceName, int iModeNum, ref DevMode lpDevMode);
public ReturnCodes Execute(DisplayDevice device, DevMode mode)
{
IntPtr ptr = new IntPtr();
return(NativeMethods.ChangeDisplaySettingsEx(device.DeviceName, ref mode, ptr, 0, ptr));
}