C# 获取和修改 计算机名、IP、DNS等

 

首先，我们需要引入 System.Net 这个命名空间

using System.Net;

 

 

string pcName = Dns.GetHostName();  //取计算机名
string ip = Dns.GetHostByName(pcName).AddressList[0].ToString();    //取IP方法一(VS里提示已过时，汗！)
string ip2 = Dns.GetHostEntry(pcName).AddressList[0].ToString();    //取IP方法二

 

方法2，就是引入 System.Management  首先先添加程序集引用，然后用以下代码获取：

using System.Management;

 

ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection nics = mc.GetInstances();
foreach (ManagementObject nic in nics)
{
        if (Convert.ToBoolean(nic["ipEnabled"]) == true)
        {
            string mac = nic["MacAddress"].ToString();//Mac地址
              string ip = (nic["IPAddress"] as String[])[0];//IP地址
              string ipsubnet = (nic["IPSubnet"] as String[])[0];//子网掩码
              string ipgateway = (nic["DefaultIPGateway"] as String[])[0];//默认网关

              string dns = nic["DNSServerSearchOrder"] as String[])[0];  //DNS
         }
}

 

方法3，引入 System.Net.NetworkInformation 这个命名空间

 

NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
            foreach (NetworkInterface adapter in nics)
            {
                if (adapter.NetworkInterfaceType.ToString().Equals("Ethernet"))
                {
                    IPInterfaceProperties ip = adapter.GetIPProperties();     //IP配置信息
                    if (ip.UnicastAddresses.Count > 0)
                    {
                        ip.UnicastAddresses[0].Address.ToString();   //IP地址
                        ip.UnicastAddresses[0].IPv4Mask.ToString();  //子网掩码
                    }
                    if (ip.GatewayAddresses.Count > 0)
                        ip.GatewayAddresses[0].Address.ToString();   //默认网关
                    if (ip.DnsAddresses.Count > 0)
                    {
                        ip.DnsAddresses[0].ToString();       //首选DNS服务器地址
                        if (ip.DnsAddresses.Count > 1)
                            ip.DnsAddresses[1].ToString();
                        ip.DnsAddresses[1].ToString();//备用DNS服务器地址
                    }
                }

 

接下来我们就来修改 计算机名、IP、DNS 等

 

static void SetNetworkAdapter()
        {
            ManagementBaseObject inPar = null;
            ManagementBaseObject outPar = null;
            ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection moc = mc.GetInstances();
            foreach( ManagementObject mo in moc )
            {
                if( ! (bool) mo[ "IPEnabled" ] )
                    continue;

                //设置ip地址和子网掩码
                inPar = mo.GetMethodParameters( "EnableStatic" );
                inPar["IPAddress"] = new string[] { "10.22.21.111","192.168.10.9" };
                inPar["SubnetMask"] = new string[] { "255.255.255.0","255.255.255.0" };
                outPar = mo.InvokeMethod( "EnableStatic", inPar, null );

                //设置网关地址
                inPar = mo.GetMethodParameters("SetGateways");
                inPar["DefaultIPGateway"] = new string[] { "10.22.21.1","192.168.10.1"};
                outPar = mo.InvokeMethod( "SetGateways", inPar, null );

                //设置DNS
                inPar = mo.GetMethodParameters("SetDNSServerSearchOrder");
                inPar["DNSServerSearchOrder"] = new string[] {"179.32.42.4","179.32.42.5"};
                outPar = mo.InvokeMethod( "SetDNSServerSearchOrder" ,inPar,null);
                    break;
            }
        }