关于最近给一家企业做的文档保全系统的技术整理（4）

5、通过WMI获取和设置本地IP、网关、DNS等信息

首先要添加System.Management这个DLL文件的引用

 private static ManagementObjectSearcher query;
        private static ManagementObjectCollection queryCollection;
        private static ManagementClass wmi;
        private static ManagementObjectCollection moc;
        private static ManagementBaseObject inPar;
        private static ManagementBaseObject outPar;
        private static string[] DefaultDNS = new string[] { "1.0.1.0","1.0.1.0" };

关于类定义的代码我就不贴了，上面是该类中用到的一些对象。

下面是相关方法的代码：

 

  /// <summary>
        /// 设置IP地址，掩码，网关和DNS
        /// </summary>
        /// <param name="ip"></param>
        /// <param name="submask"></param>
        /// <param name="getway"></param>
        /// <param name="dns"></param>
        public static void SetIPAddress(string[] ip, string[] submask, string[] getway, string[] dns)
        {
            wmi = new ManagementClass("Win32_NetworkAdapterConfiguration");
            moc = wmi.GetInstances();
            inPar = null;
            outPar = null;
            foreach (ManagementObject mo in moc)
            {
                //如果没有启用IP设置的网络设备则跳过
                if (!(bool)mo["IPEnabled"])
                    continue;

                //设置IP地址和掩码
                if (ip != null && submask != null)
                {
                    inPar = mo.GetMethodParameters("EnableStatic");
                    inPar["IPAddress"] = ip;
                    inPar["SubnetMask"] = submask;
                    outPar = mo.InvokeMethod("EnableStatic", inPar, null);
                }

                //设置网关地址
                if (getway != null)
                {
                    inPar = mo.GetMethodParameters("SetGateways");
                    inPar["DefaultIPGateway"] = getway;
                    outPar = mo.InvokeMethod("SetGateways", inPar, null);
                }

                //设置DNS地址
                if (dns != null)
                {
                    inPar = mo.GetMethodParameters("SetDNSServerSearchOrder");
                    inPar["DNSServerSearchOrder"] = dns;
                    outPar = mo.InvokeMethod("SetDNSServerSearchOrder", inPar, null);
                }
            }
        }

该方法用于设置本地的相关ip信息。

获取的方法如下：

        public static string[] GetIP()
        {
            query = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration WHERE IPEnabled = 'TRUE'");
            queryCollection = query.Get();

            foreach (ManagementObject mo in queryCollection)
            {

                return (string[])mo["IPAddress"];
            }
            return null;
        }
        public static string[] GetGetWay()
        {
            query = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration WHERE IPEnabled = 'TRUE'");
            queryCollection = query.Get();

            foreach (ManagementObject mo in queryCollection)
            {

                return (string[])mo["DefaultIPGateway"];
            }
            return null;
        }
        public static string[] GetDNS()
        {
            query = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration WHERE IPEnabled = 'TRUE'");
            queryCollection = query.Get();

            foreach (ManagementObject mo in queryCollection)
            {

                return (string[])mo["DNSServerSearchOrder"];
            }
            return null;
        }

设置ip和dns为自动获取dhcp分配的方法：

 

      /// <summary>
        /// 启用DHCP服务器
        /// </summary>
        public static void EnableDHCP()
        {
            wmi = new ManagementClass("Win32_NetworkAdapterConfiguration");
            moc = wmi.GetInstances();
            foreach (ManagementObject mo in moc)
            {
                //如果没有启用IP设置的网络设备则跳过
                if (!(bool)mo["IPEnabled"])
                    continue;

                //重置DNS为空
                mo.InvokeMethod("SetDNSServerSearchOrder", null);
                //开启DHCP
                mo.InvokeMethod("EnableDHCP", null);
            }
        }

说明：如果你设置了本地的网关或者dns信息后，需要将本地的ip配置该为DHCP分配的时候直接调用EnableDHCP无效的。你需要先重新设置下ip再调用EnableDHCP才有效。

  SetIPAddress(new string[] { "1.1.1.1" }, new string[] { "255.0.0.0" });
                            EnableDHCP();

另外测试显示，在部分xp笔记本电脑上功能无效，可能是操作系统的版本问题。