[WMI] Query Host And Monitor Serial ID

SerialQuery.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Management;
using System.Text;
using static System.Management.ManagementObjectCollection;

namespace SerialQuery
{
    public class Program
    {
        private const string OUTPUT_FILE = "SN.txt";

        public struct MonitorInformation
        {
            public string connectHost;
            public string makeModel;
            public string serialNumber;
        }

        public static string convertWMIDataToString(object data)
        {
            return Encoding.UTF8.GetString(((ushort[])data).Select(Convert.ToByte).ToArray()).TrimEnd('\0').TrimEnd();
        }

        public static string queryWMIHost()
        {
            using (ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT SerialNumber FROM Win32_BIOS"))
            using (ManagementObjectCollection collection = searcher.Get())
            using (ManagementObjectEnumerator enumerator = collection.GetEnumerator())
            {
                enumerator.MoveNext();
                ManagementBaseObject queryObject = enumerator.Current;
                object serialNumber = queryObject["SerialNumber"];
                if (serialNumber == null)
                {
                    throw new KeyNotFoundException("找不到 SerialNumber 資料");
                }
                return serialNumber.ToString();
            }
        }

        public static MonitorInformation queryWMIMonitor()
        {
            MonitorInformation ret = new MonitorInformation();
            using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(@"root\WMI", "SELECT __Server, UserFriendlyName, SerialNumberID FROM WmiMonitorID"))
            using (ManagementObjectCollection collection = searcher.Get())
            using (ManagementObjectEnumerator enumerator = collection.GetEnumerator())
            {
                enumerator.MoveNext();
                ManagementBaseObject queryObject = enumerator.Current;
                object connectHost = queryObject["__Server"];
                if (connectHost == null)
                {
                    throw new KeyNotFoundException("找不到 __Server 資料");
                }
                ret.connectHost = connectHost.ToString();

                object userFriendlyName = queryObject["UserFriendlyName"];
                if (userFriendlyName == null)
                {
                    throw new KeyNotFoundException("找不到 UserFriendlyName 資料");
                }
                ret.makeModel = convertWMIDataToString(userFriendlyName);

                object serialNumber = queryObject["SerialNumberID"];
                if (serialNumber == null)
                {
                    throw new KeyNotFoundException("找不到 SerialNumberID 資料");
                }
                ret.serialNumber = convertWMIDataToString(serialNumber);
                return ret;
            }
        }

        public static string outputWMIResult()
        {
            StringBuilder ret = new StringBuilder();
            ret.AppendLine("Host SN");
            ret.AppendLine($"Serial Number : {queryWMIHost()}").AppendLine();

            MonitorInformation monitorInformation = queryWMIMonitor();
            ret.AppendLine("Monitor SN");
            ret.AppendLine($"Connect To : {monitorInformation.connectHost}");
            ret.AppendLine($"Make Model : {monitorInformation.makeModel}");
            ret.Append($"Serial Number : {monitorInformation.serialNumber}");
            return ret.ToString();
        }

        public static void Main()
        {
            Console.Title = "查詢主機及螢幕序號";
            try
            {
                string output = outputWMIResult();
                Console.WriteLine(output);

                File.WriteAllText(OUTPUT_FILE, output, Encoding.UTF8);
                using (Process.Start(OUTPUT_FILE))
                {
                }
            }
            catch (Exception ex)
            {
                Console.Error.WriteLine($"發生例外狀況 : {ex.Message}");
            }
            Console.Write("請按任意鍵繼續 ...");
            Console.ReadKey(true);
        }
    }
}