计算机信息类ComputerInfo

using System;
using System.Management;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Diagnostics;
using System.Text.RegularExpressions;

namespace BaseFunction
{
    ///<summary>
    ///计算机信息类
    ///</summary>

    public  class ComputerInfo
    {
        private  string CpuID;
        private string MacAddress;
        private string DiskID;
        private string IpAddress;
        private string LoginUserName;
        private string ComputerName;
        private string SystemType;
        private string TotalPhysicalMemory; //单位：M
        private static ComputerInfo _instance;

        internal static ComputerInfo Instance()
        {
            if (_instance == null)
                _instance = new ComputerInfo();
            return _instance;
        }

        internal ComputerInfo()
        {
            CpuID = GetCpuID();
            MacAddress = GetMacAddress();
            DiskID = GetDiskID();
            IpAddress = GetIPAddress();
            LoginUserName = GetUserName();
            SystemType = GetSystemType();
            TotalPhysicalMemory = GetTotalPhysicalMemory();
            ComputerName = GetComputerName();
        }
        /// <summary>
        /// 浏览器客户端  获取网卡MAC地址MD5加密串  杨旭东
        /// </summary>
        /// <returns></returns>
        public static string GetClientMac()
        {
            try
            {
              string clientIP =System.Web.HttpContext.Current.Request.UserHostAddress.Trim();
              Int32 idest = API.inet_addr(clientIP);
              Int64 macInfo = new Int64();
              Int32 length = 6;
              int res = API.SendARP(idest, 0, ref macInfo, ref length);
              string mac_src = macInfo.ToString("X");
              if (!string.IsNullOrEmpty(mac_src) && !"0".Equals(mac_src))
              {
                  while (mac_src.Length < 12)
                  {
                      mac_src = mac_src.Insert(0, "0");
                  }
                  string mac_dest = string.Empty;
                  for (int i = 0; i < 11; i++)
                  {
                      if (i % 2 == 0)
                      {
                          if (i == 10)
                              mac_dest = mac_dest.Insert(0, mac_src.Substring(i, 2));
                          else
                              mac_dest = "-" + mac_dest.Insert(0, mac_src.Substring(i, 2));
                      }
                  }
                  return mac_dest;
              }
            }
            catch
            {
                return "0";
            }
            return "0";
        }

        /// <summary>
        /// 获取CPU序列号代码
        /// </summary>
        /// <returns></returns>
      public  static  string GetCpuID()
        {
            try
            {
                //获取CPU序列号代码
                string cpuInfo = "";//cpu序列号
                ManagementClass mc = new ManagementClass("Win32_Processor");
                ManagementObjectCollection moc = mc.GetInstances();
                foreach (ManagementObject mo in moc)
                {
                    cpuInfo = mo.Properties["ProcessorId"].Value.ToString();
                }
                moc = null;
                mc = null;
                return cpuInfo;
            }
            catch
            {
                return "unknow";
            }
            finally
            {
            }

        }

        /// <summary>
        /// 获取网卡硬件地址
        /// </summary>
        /// <returns></returns>
      public static string GetMacAddress()
        {
            try
            {
                //获取网卡硬件地址
            return Mac.GetMacAddress();

            }
            catch
            {
                return "unknow";
            }
            finally
            {
            }
        }

        /// <summary>
        /// 获取IP地址（IPv4）
        /// </summary>
        /// <returns></returns>
      public static string GetIPAddress()
        {
            try
            {
                IPAddress[] arrIPAddresses = Dns.GetHostAddresses(Dns.GetHostName());
                foreach (IPAddress ip in arrIPAddresses)
                {
                    if (ip.AddressFamily.Equals(AddressFamily.InterNetwork))//IPv4
                    {
                        return ip.ToString();
                    }
                }
                return "unknow";
            }
            catch
            {
                return "unknow";
            }
            finally
            {
            }

        }

        /// <summary>
        /// 获取硬盘ID
        /// </summary>
        /// <returns></returns>
      public static string GetDiskID()
        {
            try
            {
             return Win32.GetHddInformation().ModuleNumber;
            }
            catch
            {
                return "unknow";
            }
            finally
            {
            }

        }

        ///<summary>
        ///操作系统的登录用户名
        ///</summary>
        ///<returns></returns>
      public static string GetUserName()
        {
            try
            {
                byte[] userName = new byte[30];
                Int32[] length = new Int32[1];
                length[0] = 30;//限定用户名长度
                API.GetUserName(userName, length);
                return System.Text.Encoding.ASCII.GetString(userName);
            }
            catch
            {
                return "unknow";
            }
            finally
            {
            }

        }

        ///<summary>
        /// PC类型
        ///</summary>
        ///<returns></returns>
      public static string GetSystemType()
        {
            try
            {
                string st = "";
                ManagementClass mc = new ManagementClass("Win32_ComputerSystem");
                ManagementObjectCollection moc = mc.GetInstances();
                foreach (ManagementObject mo in moc)
                {

                    st = mo["SystemType"].ToString();

                }
                moc = null;
                mc = null;
                return st;
            }
            catch
            {
                return "unknow";
            }
            finally
            {
            }

        }

        ///<summary>
        ///物理内存
        ///</summary>
        ///<returns></returns>
      public static string GetTotalPhysicalMemory()
        {
            try
            {

                API.MEMORY_INFO memoryInfo = new API.MEMORY_INFO();
                API.GlobalMemoryStatus(ref memoryInfo);
                return memoryInfo.dwTotalPhys.ToString();
            }
            catch
            {
                return "unknow";
            }
            finally
            {
            }
        }
        ///<summary>
        /// 获取计算机名称
        ///</summary>
        ///<returns></returns>
      public static string GetComputerName()
        {
            try
            {
                byte[] computerName = new byte[30];
                Int32[] length = new Int32[1];
                length[0] = 30;//限定计算机名长度
                API.GetComputerName(computerName,length);
                return System.Text.Encoding.ASCII.GetString(computerName);
            }
            catch
            {
                return "unknow";
            }
            finally
            {
            }
        }
    }
}

API是一个类：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace BaseFunction
{
    class API
    {
        [DllImport("kernel32")]//内存
        public static extern void GlobalMemoryStatus(ref  MEMORY_INFO meminfo);

        [StructLayout(LayoutKind.Sequential)]
        public struct CPU_INFO
        {
            public uint dwOemId;
            public uint dwPageSize;
            public uint lpMinimumApplicationAddress;
            public uint lpMaximumApplicationAddress;
            public uint dwActiveProcessorMask;
            public uint dwNumberOfProcessors;
            public uint dwProcessorType;
            public uint dwAllocationGranularity;
            public uint dwProcessorLevel;
            public uint dwProcessorRevision;
        }

        //定义内存的信息结构
        [StructLayout(LayoutKind.Sequential)]
        public struct MEMORY_INFO
        {
            public uint dwLength;
            public uint dwMemoryLoad;
            public uint dwTotalPhys;
            public uint dwAvailPhys;
            public uint dwTotalPageFile;
            public uint dwAvailPageFile;
            public uint dwTotalVirtual;
            public uint dwAvailVirtual;
        }
        [DllImport("kernel32",EntryPoint="GetComputerName",ExactSpelling=false,SetLastError=true)]//计算机名称
         public static extern bool GetComputerName([MarshalAs(UnmanagedType.LPArray)]byte[] IpBuffer,[MarshalAs(UnmanagedType.LPArray)]Int32[] nSize);
        [DllImport("advapi32", EntryPoint = "GetUserName", ExactSpelling = false, SetLastError = true)]//计算机用户名
         public static extern bool GetUserName([MarshalAs(UnmanagedType.LPArray)]byte[] IpBuffer, [MarshalAs(UnmanagedType.LPArray)]Int32[] nSize);
        [DllImport("Iphlpapi.dll")]
        public static extern int SendARP(Int32 dest, Int32 host, ref Int64 mac, ref Int32 length);
        [DllImport("Ws2_32.dll")]
        public static extern Int32 inet_addr(string ip);

    }
}

转自：苏飞博客。原文：http://www.cnblogs.com/sufei/archive/2011/06/22/2087363.html