/// <summary>
/// Get the class Guid of a VideoDevice.
/// </summary>
/// <param name="device">The VideoDevice object to get the class guid.</param>
/// <returns>Returns a string that indicates the class guid of the device.</returns>
public static string GetDeviceClassGuid(VideoDevice device)
{
if (string.IsNullOrEmpty(device.Name) || string.IsNullOrEmpty(device.DeviceId))
throw new ArgumentException("Device Name and device Id can't be set to nothing.");
string queryString = string.Format("SELECT * FROM Win32_PnPSignedDriver WHERE DeviceName='{0}' AND DeviceID='{1}'", device.Name, device.PnpDeviceId.Replace(@"\", @"\\"));
using (ManagementObjectSearcher searcher = new ManagementObjectSearcher("root\\CIMV2", queryString))
{
ManagementObject queryObj = searcher.Get().OfType<ManagementObject>().FirstOrDefault();
return queryObj == null ? null : (string)queryObj["ClassGuid"];
}
}
/// <summary>
/// Retrieve all the video controllers currently active on the system.
/// </summary>
/// <returns>Returns a VideoDevice list that contains all the devices that are currently active.</returns>
public static List<VideoDevice> GetPrimaryDevices()
{
List<VideoDevice> devices = new List<VideoDevice>();
using (ManagementObjectSearcher searcher = new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_VideoController"))
{
foreach (ManagementObject queryObj in searcher.Get())
{
// The name of the device.
string name = (string)queryObj["Name"];
// The description of the device.
string description = (string)queryObj["Description"];
// The amount of ram available on the device.
int ram = Convert.ToInt32(queryObj["AdapterRAM"]);
// The ID of the device.
string deviceId = (string)queryObj["DeviceID"];
// The PnP ID of the device.
string pnpDeviceId = (string)queryObj["PNPDeviceID"];
// The current status of the device.
string status = (string)queryObj["Status"];
// The processor information of the device.
string processorInfo = (string)queryObj["VideoProcessor"];
VideoDevice device = new VideoDevice(name);
device.Description = description;
device.RAM = ram;
device.DeviceId = deviceId;
device.PnpDeviceId = pnpDeviceId;
device.ProcessorInformation = processorInfo;
device.Status = status;
device.ClassGuid = GetDeviceClassGuid(device);
devices.Add(device);
}
}
return devices;
}
