/// <summary>
/// Gets system display devices
/// </summary>
/// <returns>Collection of DisplayDeviceData</returns>
public static IEnumerable <DisplayDeviceData> ReadDisplayDevices()
{
var result = new List <DisplayDeviceData>();
NativeMethods.DISPLAY_DEVICE d = new NativeMethods.DISPLAY_DEVICE();
d.cb = Marshal.SizeOf(d);
for (uint id = 0; NativeMethods.EnumDisplayDevices(null, id, ref d, 0); id++)
{
if (d.StateFlags.HasFlag(NativeMethods.DisplayDeviceStateFlags.AttachedToDesktop))
{
d.cb = Marshal.SizeOf(d);
NativeMethods.EnumDisplayDevices(d.DeviceName, 0, ref d, 0);
if (d.StateFlags.HasFlag(NativeMethods.DisplayDeviceStateFlags.AttachedToDesktop))
{
result.Add(new DisplayDeviceData
{
Name = d.DeviceName,
DeviceId = d.DeviceID,
DeviceString = d.DeviceString,
DeviceKey = d.DeviceKey
});
}
}
d.cb = Marshal.SizeOf(d);
}
return(result);
}
/// <summary>
/// Gets system display devices
/// </summary>
/// <returns>Collection of DisplayDeviceData</returns>
public static IEnumerable <DisplayDeviceData> ReadDisplayDevices()
{
Log.Logger.Information("Reading display devices");
var result = new List <DisplayDeviceData>();
for (uint id = 0; ; id++)
{
Log.Logger.Information($"Seeking device {id}");
NativeMethods.DISPLAY_DEVICE device1 = new NativeMethods.DISPLAY_DEVICE();
device1.cb = Marshal.SizeOf(device1);
bool rv = NativeMethods.EnumDisplayDevices(null, id, ref device1, 0);
Log.Logger.Information($"EnumDisplayDevices retval = {rv}");
if (!rv)
{
break;
}
Log.Logger.Information($"Device name: {device1.DeviceName}");
if (device1.StateFlags.HasFlag(NativeMethods.DisplayDeviceStateFlags.AttachedToDesktop))
{
Log.Logger.Information("Device attached to desktop");
NativeMethods.DISPLAY_DEVICE device2 = new NativeMethods.DISPLAY_DEVICE();
device2.cb = Marshal.SizeOf(device2);
rv = NativeMethods.EnumDisplayDevices(device1.DeviceName, 0, ref device2, 0);
Log.Logger.Information($"Secondary EnumDisplayDevices retval = {rv}");
if (rv && device2.StateFlags.HasFlag(NativeMethods.DisplayDeviceStateFlags.AttachedToDesktop))
{
Log.Logger.Information($"Display device data = {device2.DeviceName}, {device2.DeviceID}");
result.Add(new DisplayDeviceData
{
Name = device2.DeviceName,
DeviceId = device2.DeviceID,
DeviceString = device2.DeviceString,
DeviceKey = device2.DeviceKey
});
}
}
device1.cb = Marshal.SizeOf(device1);
}
return(result);
}
