获取计算机的网卡及打印机信息

1.获取网卡地址：

 private string GetMacAddress()
        {
            string code = null;
            SelectQuery query = new SelectQuery("select * from Win32_ComputerSystemProduct");
            using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(query))
            {
                foreach (var item in searcher.Get())
                {
                    using (item) code = item["UUID"].ToString();
                }
            }
            return code;
        }

2.获取本机系统打印机：

        [DllImport("winspool.drv")]
        public static extern bool SetDefaultPrinter(String Name); //调用win api将指定名称的打印机设置为默认打印机

        private static PrintDocument pd = new PrintDocument();
        //获取本机默认打印机名称
        public static String DefaultPrinter()
        {
            return pd.PrinterSettings.PrinterName;
        }
        public static List<String> GetLocalPrinters()
        {
            List<String> fPrinters = new List<String>();
            fPrinters.Add(DefaultPrinter()); //默认打印机始终出现在列表的第一项
            foreach (String fPrinterName in PrinterSettings.InstalledPrinters)
            {
                if (!fPrinters.Contains(fPrinterName))
                {
                    fPrinters.Add(fPrinterName);
                }
            }
            return fPrinters;
        }

显示在下拉列表中

  List<String> list = LocalPrinter.GetLocalPrinters(); //获得系统中的打印机列表
            foreach (String s in list)
            {
                printerComboBox.Items.Add(s); //将打印机名称添加到下拉框中
            }
            printerComboBox.SelectedIndex = 0;