public List <SystemDisplayModel> GetAll()
{
var modeIndex = 0;
var mode = new NativeMethods.Display.DEVMODE();
var displays = new List <SystemDisplayModel>();
mode.dmSize = (ushort)Marshal.SizeOf(mode);
while (NativeMethods.Display.EnumDisplaySettings(null, modeIndex, ref mode))
{
var display = new SystemDisplayModel((int)mode.dmPelsWidth, (int)mode.dmPelsHeight, (int)mode.dmBitsPerPel);
if (!displays.Any(__ => __.Width == display.Width && __.Height == display.Height && __.BitCount == display.BitCount))
{
displays.Add(display);
}
modeIndex++;
}
if (!displays.Any())
{
throw new InvalidOperationException("EnumDisplaySettings()");
}
return(displays);
}
public SystemDisplayModel GetHigherDisplay()
{
var displays = GetAll();
SystemDisplayModel higherDislay = null;
foreach (var display in displays)
{
if (higherDislay == null || higherDislay.Width < display.Width)
{
higherDislay = display;
}
}
return(higherDislay);
}
public SystemDisplayModel GetLowerDisplay()
{
var displays = GetAll();
SystemDisplayModel lowerDislay = null;
foreach (var display in displays)
{
if (lowerDislay == null || lowerDislay.Width > display.Width)
{
lowerDislay = display;
}
}
return(lowerDislay);
}
public void SetCurrent(SystemDisplayModel display)
{
var originalMode = new NativeMethods.Display.DEVMODE();
originalMode.dmSize = (ushort)Marshal.SizeOf(originalMode);
NativeMethods.Display.EnumDisplaySettings(null, NativeMethods.Display.ENUM_CURRENT_SETTINGS, ref originalMode);
var newMode = originalMode;
newMode.dmPelsWidth = (uint)display.Width;
newMode.dmPelsHeight = (uint)display.Height;
newMode.dmBitsPerPel = (uint)display.BitCount;
var result = NativeMethods.Display.ChangeDisplaySettings(ref newMode, 0);
if (result == NativeMethods.Display.DISP_CHANGE_SUCCESSFUL)
{
return;
}
throw new InvalidOperationException("ChangeDisplaySettings()");
}