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在項(xiàng)目》》添加引用....里面引用System.Management 。 再using System.Management 就可以了
必須按照以上操作，否則使用ManagementObjectSearcher時(shí)會(huì)提示未引用空間。

private void button1_Click(object sender, EventArgs e)

        {

            textBox1.Text = "";

            foreach (string s in listBox1.SelectedItems)

            {

                ManagementObjectSearcher searcher = new ManagementObjectSearcher("Select * From "+s);

                foreach (ManagementObject mo in searcher.Get())

                {

                    textBox1.AppendText("============" + s+ "開始＝＝＝＝＝＝\r\n");

                    foreach (PropertyData pd in mo.Properties)

                    {

                        textBox1.Text += pd.Name + " :: ";

                        if (pd.Value != null)

                        {

                            textBox1.Text += pd.Value.ToString();

                        }

                        textBox1.Text += "\r\n";

                    }

                    textBox1.AppendText("============" + s + "結(jié)束＝＝＝＝＝＝\r\n\r\n\r\n");

                    //break;

                }

            }

        }

 //獲取主板序列號
        public string GetBIOSSerialNumber()
        {
            try
            {
                ManagementObjectSearcher searcher = new ManagementObjectSearcher("Select * From Win32_BIOS");
                string sBIOSSerialNumber = "";
                foreach (ManagementObject mo in searcher.Get())
                {
                    sBIOSSerialNumber = mo["SerialNumber"].ToString().Trim();
                }
                return sBIOSSerialNumber;
            }
            catch
            {
                return "";
            }
        }
        //獲取CPU序列號
        public string GetCPUSerialNumber()
        {
            try
            {
                ManagementObjectSearcher searcher = new ManagementObjectSearcher("Select * From Win32_Processor");
                string sCPUSerialNumber = "";
                foreach (ManagementObject mo in searcher.Get())
                {
                    sCPUSerialNumber = mo["ProcessorId"].ToString().Trim();
                }
                return sCPUSerialNumber;
            }
            catch
            {
                return "";
            }
        }
        //獲取硬盤序列號
        public string GetHardDiskSerialNumber()
        {
            try
            {
                ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_PhysicalMedia");
                string sHardDiskSerialNumber = "";
                foreach (ManagementObject mo in searcher.Get())
                {
                    sHardDiskSerialNumber = mo["SerialNumber"].ToString().Trim();
                    break;
                }
                return sHardDiskSerialNumber;
            }
            catch
            {
                return "";
            }
        }
        //獲取網(wǎng)卡地址
        public string GetNetCardMACAddress()
        {
            try
            {
                ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapter WHERE ((MACAddress Is Not NULL) AND (Manufacturer <> 'Microsoft'))");
                string NetCardMACAddress = "";
                foreach (ManagementObject mo in searcher.Get())
                {
                    NetCardMACAddress = mo["MACAddress"].ToString().Trim();
                }
                return NetCardMACAddress;
            }
            catch
            {
                return "";
            }
        }

在很多情況下，你可能都需要得到微機(jī)的硬件信息。比如：你想給你的軟件加鎖，不讓別人隨便訪問。

最有效的辦法是獲取CPU的序列號，然后讓你的軟件只能運(yùn)行在有這樣的CPU序列號的機(jī)器上。眾所周知，CPU序列號是唯一的！因此，這樣就可以為你的軟件加鎖了。

另外一個(gè)需要硬盤信息的例子是：硬盤有幾個(gè)分區(qū)，每個(gè)分區(qū)各有多少剩余空間。當(dāng)你正在做一個(gè)多媒體應(yīng)用程序的時(shí)候，你可能也需要獲得有關(guān)聲卡、顯卡的硬件信息。

本應(yīng)用程序另一個(gè)精彩的應(yīng)用是：獲取有關(guān)系統(tǒng)內(nèi)存的信息，如內(nèi)存地址，內(nèi)存設(shè)備等等。 

首先，你必須知道這個(gè)應(yīng)用程序的功能是使用System.Management這個(gè)類得到的。因此，你需要加上下面的這句話：

using System.Management;

為了獲取硬件信息，你還需要?jiǎng)?chuàng)建一個(gè)ManagementObjectSearcher 對象。

ManagementObjectSearcher searcher = new ManagementObjectSearcher("select * from " + Key);

// 硬件 

Win32_Processor, // CPU 處理器 

Win32_PhysicalMemory, // 物理內(nèi)存條 

Win32_Keyboard, // 鍵盤 

Win32_PointingDevice, // 點(diǎn)輸入設(shè)備，包括鼠標(biāo)。 

Win32_FloppyDrive, // 軟盤驅(qū)動(dòng)器 

Win32_DiskDrive, // 硬盤驅(qū)動(dòng)器 

Win32_CDROMDrive, // 光盤驅(qū)動(dòng)器 

Win32_BaseBoard, // 主板 

Win32_BIOS, // BIOS 芯片 

Win32_ParallelPort, // 并口 

Win32_SerialPort, // 串口 

Win32_SerialPortConfiguration, // 串口配置 

Win32_SoundDevice, // 多媒體設(shè)置，一般指聲卡。 

Win32_SystemSlot, // 主板插槽 (ISA & PCI & AGP) 

Win32_USBController, // USB 控制器 

Win32_NetworkAdapter, // 網(wǎng)絡(luò)適配器 

Win32_NetworkAdapterConfiguration, // 網(wǎng)絡(luò)適配器設(shè)置 

Win32_Printer, // 打印機(jī) 

Win32_PrinterConfiguration, // 打印機(jī)設(shè)置 

Win32_PrintJob, // 打印機(jī)任務(wù) 

Win32_TCPIPPrinterPort, // 打印機(jī)端口 

Win32_POTSModem, // MODEM 

Win32_POTSModemToSerialPort, // MODEM 端口 

Win32_DesktopMonitor, // 顯示器 

Win32_DisplayConfiguration, // 顯卡 

Win32_DisplayControllerConfiguration, // 顯卡設(shè)置 

Win32_VideoController, // 顯卡細(xì)節(jié)。 

Win32_VideoSettings, // 顯卡支持的顯示模式。 



// 操作系統(tǒng) 

Win32_TimeZone, // 時(shí)區(qū) 

Win32_SystemDriver, // 驅(qū)動(dòng)程序 

Win32_DiskPartition, // 磁盤分區(qū) 

Win32_LogicalDisk, // 邏輯磁盤 

Win32_LogicalDiskToPartition, // 邏輯磁盤所在分區(qū)及始末位置。 

Win32_LogicalMemoryConfiguration, // 邏輯內(nèi)存配置 

Win32_PageFile, // 系統(tǒng)頁文件信息 

Win32_PageFileSetting, // 頁文件設(shè)置 

Win32_BootConfiguration, // 系統(tǒng)啟動(dòng)配置 

Win32_ComputerSystem, // 計(jì)算機(jī)信息簡要 

Win32_OperatingSystem, // 操作系統(tǒng)信息 

Win32_StartupCommand, // 系統(tǒng)自動(dòng)啟動(dòng)程序 

Win32_Service, // 系統(tǒng)安裝的服務(wù) 

Win32_Group, // 系統(tǒng)管理組 

Win32_GroupUser, // 系統(tǒng)組帳號 

Win32_UserAccount, // 用戶帳號 

Win32_Process, // 系統(tǒng)進(jìn)程 

Win32_Thread, // 系統(tǒng)線程 

Win32_Share, // 共享 

Win32_NetworkClient, // 已安裝的網(wǎng)絡(luò)客戶端 

Win32_NetworkProtocol, // 已安裝的網(wǎng)絡(luò)協(xié)議 

上面代碼的Key是一個(gè)將被對應(yīng)正確的數(shù)據(jù)填入的值。例如，獲取CPU的信息，就需要把Key值設(shè)成Win32_Processor。所有Key可能的值，列舉如下：

首先，調(diào)用ManagementObjectSearcher實(shí)例（在本文中的例子里為searcher ）中的Get()方法，該方法將會(huì)把返回信息填在這個(gè)實(shí)例中。然后，你所要做的就是處理這個(gè)實(shí)例searcher中的數(shù)據(jù)。

foreach (ManagementObject share in searcher.Get()){// Some Codes ...}

每個(gè)ManagementObject的對象中都有一些，我們所需要的數(shù)據(jù)，當(dāng)然我們可以接著這么處理這些數(shù)據(jù)：

foreach (PropertyData PC in share.Properties){//some codes ...}

本文中代碼的其它部分只是對于ListView控件的一些操作，很簡單，就不再詳述了！

/// <summary>
        /// 獲得CPU編號
        /// </summary>
        /// <returns></returns>
        public string GetCPUID()
        {
            string cpuid = "";
            ManagementClass mc = new ManagementClass("Win32_Processor");
            ManagementObjectCollection moc = mc.GetInstances();
            foreach (ManagementObject mo in moc)
            {
                cpuid = mo.Properties["ProcessorId"].Value.ToString();
            }
            return cpuid;
        }

        /// <summary>
        /// 獲取硬盤序列號
        /// </summary>
        /// <returns></returns>
        public string GetDiskSerialNumber()
        {
            //這種模式在插入一個(gè)U盤后可能會(huì)有不同的結(jié)果，如插入我的手機(jī)時(shí)
            String HDid = "";
            ManagementClass mc = new ManagementClass("Win32_DiskDrive");
            ManagementObjectCollection moc = mc.GetInstances();
            foreach (ManagementObject mo in moc)
            {
                HDid = (string)mo.Properties["Model"].Value;//SerialNumber
                break;//這名話解決有多個(gè)物理盤時(shí)產(chǎn)生的問題，只取第一個(gè)物理硬盤
            }
            return HDid;

            /*ManagementClass mc = new ManagementClass("Win32_PhysicalMedia");
            ManagementObjectCollection moc = mc.GetInstances();
            string str = "";
            foreach (ManagementObject mo in moc)
            {
                str = mo.Properties["SerialNumber"].Value.ToString();
                break;
            }
            return str;*/
        }

        /// <summary>
        /// 獲取網(wǎng)卡硬件地址
        /// </summary>
        /// <returns></returns>
        public string GetMacAddress()
        {
            string mac = "";
            ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection moc = mc.GetInstances();
            foreach (ManagementObject mo in moc)
            {
                if ((bool)mo["IPEnabled"] == true)
                {
                    mac = mo["MacAddress"].ToString();
                    break;
                }
            }
            return mac;
        }

        /// <summary>
        /// 獲取IP地址
        /// </summary>
        /// <returns></returns>
        public string GetIPAddress()
        {
            string st = "";
            ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection moc = mc.GetInstances();
            foreach (ManagementObject mo in moc)
            {
                if ((bool)mo["IPEnabled"] == true)
                {
                    //st=mo["IpAddress"].ToString();
                    System.Array ar;
                    ar = (System.Array)(mo.Properties["IpAddress"].Value);
                    st = ar.GetValue(0).ToString();
                    break;
                }
            }
            return st;
        }

        /// <summary>
        /// 操作系統(tǒng)的登錄用戶名
        /// </summary>
        /// <returns></returns>
        public string GetUserName()
        {
            return Environment.UserName;
        }

        /// <summary>
        /// 獲取計(jì)算機(jī)名
        /// </summary>
        /// <returns></returns>
        public string GetComputerName()
        {
            return Environment.MachineName;
        }