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using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Runtime.InteropServices;using System.Drawing;namespace RSS_STAND_ALONE{    public class SystemInfo    {        public virtual List
   
     GetMonitorPnpDeviceId()        {            List
    
      rt = new List
     
      ();            using (System.Management.ManagementClass mc = new System.Management.ManagementClass("Win32_DesktopMonitor"))            {                using (System.Management.ManagementObjectCollection moc = mc.GetInstances())                {                    foreach (var o in moc)                    {                        var each = (System.Management.ManagementObject)o;                        object obj = each.Properties["PNPDeviceID"].Value;                        if (obj == null)                            continue;                        rt.Add(each.Properties["PNPDeviceID"].Value.ToString());                    }                }            }            return rt;        }        public virtual byte[] GetMonitorEdid(string monitorPnpDevId)        {            return (byte[])Microsoft.Win32.Registry.GetValue(@"HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\" + monitorPnpDevId + @"\Device Parameters", "EDID", new byte[] { });        }        //获取显示器物理尺寸(cm)        public virtual SizeF GetMonitorPhysicalSize(string monitorPnpDevId)        {            byte[] edid = GetMonitorEdid(monitorPnpDevId);            if (edid.Length < 23)                return SizeF.Empty;            return new SizeF(edid[21], edid[22]);        }        //通过屏显示器理尺寸转换为显示器大小(inch)        public static float MonitorScaler(SizeF moniPhySize)        {            double mDSize = Math.Sqrt(Math.Pow(moniPhySize.Width, 2) + Math.Pow(moniPhySize.Height, 2)) / 2.54d;            return (float)Math.Round(mDSize, 1);        }        public static void Debug()        {            SystemInfo sysInfo = new SystemInfo();            string id = sysInfo.GetMonitorPnpDeviceId()[0];            SizeF size = sysInfo.GetMonitorPhysicalSize(id);           System.Windows.Forms. MessageBox.Show(SystemInfo.MonitorScaler(size).ToString() + @"寸");        }    }}
     
    
   

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