public static List<int> GetUseIndex(){List<int> list = new List<int>();ManagementClass mc = new ManagementClass("Win32_NetworkAdapter");ManagementObjectCollection moc = mc.GetInstances();foreach (ManagementObject mo in moc){bool p1 = Convert.ToBoolean(mo["NetEnabled"]);bool p2 = Convert.ToBoolean(mo["PhysicalAdapter"]);if (p1 && p2){list.Add(Convert.ToInt32((mo["Index"])));}}return list;}

        public static bool GetWiredIndex(ref int index, ref string msg){try{List<int> allenable = GetUseIndex();if (allenable.Count == 0){msg = "未查找到有效网络连接";return false;}List<int> allReal = new List<int>();foreach (int ii in allenable){var vv = Convert.ToInt32(GetCharacteristics(@"SYSTEM\ControlSet001\Control\Class\{4d36e972-e325-11ce-bfc1-08002be10318}\000" + ii, "Characteristics"));if ((vv & 0x4) == 0x4)//区分物理网卡、虚拟网卡
                    {allReal.Add(ii);}}if (allReal.Count == 0){msg = "未查找到有效物理网卡";return false;}int rv = -1;foreach (int ii in allReal){var vv = GetCharacteristics(@"SYSTEM\ControlSet001\Control\Class\{4d36e972-e325-11ce-bfc1-08002be10318}\000" + ii + @"\Ndi\Interfaces", "LowerRange").ToString();if (!vv.Contains("wifi") && !vv.Contains("wlan")){rv = ii;break;}}if (rv == -1){msg = "未查找到有效有线网卡";return false;}else{index = rv;return true;}}catch (Exception ex){msg = ex.Message;return false;}}private static object GetCharacteristics(string name, string key){object registData;using (RegistryKey hkml = Registry.LocalMachine){RegistryKey software = hkml.OpenSubKey(name, true);registData = software.GetValue(key).ToString();}return registData;}

 public static bool SetWiredIP(int index, string ip, string subnetMask, string ipGateway, string dns){　　　　　　　　ManagementBaseObject inPar = null;ManagementBaseObject outPar = null;ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");ManagementObjectCollection moc = mc.GetInstances();foreach (ManagementObject mo in moc){if (Convert.ToInt32(mo["Index"]) == index){//设置ip地址和子网掩码 inPar = mo.GetMethodParameters("EnableStatic");inPar["IPAddress"] = new string[] { ip };inPar["SubnetMask"] = new string[] { subnetMask };outPar = mo.InvokeMethod("EnableStatic", inPar, null);//设置网关地址 inPar = mo.GetMethodParameters("SetGateways");inPar["DefaultIPGateway"] = new string[] { ipGateway };outPar = mo.InvokeMethod("SetGateways", inPar, null);//设置DNS inPar = mo.GetMethodParameters("SetDNSServerSearchOrder");inPar["DNSServerSearchOrder"] = new string[] { dns };outPar = mo.InvokeMethod("SetDNSServerSearchOrder", inPar, null);return true;}}return false;}