public static IEnumerable <DisplayInfo> GetDisplays()
{
// Get attached DisplayDevices
List <Win32DisplayDevice> devices = new List <Win32DisplayDevice>();
for (uint i = 0; ; i++)
{
Win32DisplayDevice d = new Win32DisplayDevice();
uint flags = EDD_GET_DEVICE_INTERFACE_NAME;
d.cb = Marshal.SizeOf(d);
bool available = NativeMethods.EnumDisplayDevices(null, i, ref d, flags);
if (!available)
{
break;
}
// Zusätzliche Abfrage, um zu schauen, ob eine einzigartige ID für das Geärt vorhanden ist
Win32DisplayDevice d2 = new Win32DisplayDevice();
d2.cb = Marshal.SizeOf(d2);
bool uniqueAvail = NativeMethods.EnumDisplayDevices(d.DeviceName, 0, ref d2, flags);
if (uniqueAvail)
{
d2.DeviceName = d.DeviceName;
}
if (uniqueAvail)
{
devices.Add(d2);
}
else
{
devices.Add(d);
}
}
// Get EDIDs from Registry and match with DisplayDevices
IntPtr devinfo = NativeMethods.SetupDiGetClassDevsEx(
ref _guidDisplay, //class GUID
0, //enumerator
IntPtr.Zero, //HWND
DIGCF_PRESENT, // Flags //DIGCF_ALLCLASSES|
IntPtr.Zero, // device info, create a new one.
null, // machine name, local machine
IntPtr.Zero); // reserved
SP_DEVINFO_DATA devdata = new SP_DEVINFO_DATA();
devdata.cbSize = (UInt32)Marshal.SizeOf(devdata);
for (uint i = 0; ; i++)
{
NativeMethods.SetupDiEnumDeviceInfo(devinfo, i, out devdata);
if (Marshal.GetLastWin32Error() == ERROR_NO_MORE_ITEMS)
{
break;
}
IntPtr HKEY = NativeMethods.SetupDiOpenDevRegKey(devinfo, ref devdata, DICS_FLAG_GLOBAL, 0, DIREG_DEV, KEY_READ);
if (HKEY == IntPtr.Zero)
{
continue;
}
for (uint r = 0; ; r++)
{
uint size = 128;
StringBuilder sb = new StringBuilder();
uint type = 0;
uint len = 1024;
IntPtr buf = Marshal.AllocHGlobal((int)len);
uint res = NativeMethods.RegEnumValue(HKEY, r, sb, ref size, IntPtr.Zero, ref type, buf, ref len);
if (res != ERROR_NO_MORE_ITEMS && sb.ToString(0, (int)size).Equals("EDID"))
{
byte[] buffer = new byte[len];
Marshal.Copy(buf, buffer, 0, (int)len);
//match
string name = "-";
string desc = "unknown";
for (int d = 0; d < devices.Count; d++)
{
Win32DisplayDevice dev = devices[d];
int inst = 0;
if (!int.TryParse(dev.Key.Substring(dev.Key.LastIndexOf('\\') + 1), out inst))
{
continue;
}
if (inst == devdata.devInst)
{
name = dev.DeviceName;
desc = dev.DeviceString;
}
}
yield return(new DisplayInfo {
Name = name, Description = desc, EDID = buffer
});
}
Marshal.FreeHGlobal(buf);
if (res == ERROR_NO_MORE_ITEMS)
{
break;
}
}
}
}
internal static extern bool EnumDisplayDevices(string lpDevice, uint iDevNum, ref Win32DisplayDevice lpDisplayDevice, uint dwFlags);