C# 修改IP、网关、DNS

要在C#中修改IP、网关和DNS，您可以使用WMI（Windows Management Instrumentation）类来实现。以下是示例代码：

using System.Management;

public static void SetIP(string ipAddress, string subnetMask, string gateway, string dns)
{
    ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
    ManagementObjectCollection moc = mc.GetInstances();

    foreach (ManagementObject mo in moc)
    {
        if ((bool)mo["IPEnabled"])
        {
            try
            {
                ManagementBaseObject newIP = mo.GetMethodParameters("EnableStatic");

                newIP["IPAddress"] = new string[] { ipAddress };
                newIP["SubnetMask"] = new string[] { subnetMask };

                mo.InvokeMethod("EnableStatic", newIP, null);

                ManagementBaseObject newGateway = mo.GetMethodParameters("SetGateways");

                newGateway["DefaultIPGateway"] = new string[] { gateway };
                newGateway["GatewayCostMetric"] = new int[] { 1 };

                mo.InvokeMethod("SetGateways", newGateway, null);

                ManagementBaseObject newDNS = mo.GetMethodParameters("SetDNSServerSearchOrder");

                newDNS["DNSServerSearchOrder"] = new string[] { dns };

                mo.InvokeMethod("SetDNSServerSearchOrder", newDNS, null);
            }
            catch (Exception ex)
            {
                // Handle exception here
            }
        }
    }
}

然后您可以调用该方法并传入所需的参数来修改IP、网关和DNS。例如：

SetIP("192.168.1.100", "255.255.255.0", "192.168.1.1", "8.8.8.8");

这将把IP地址设置为192.168.1.100，子网掩码设置为255.255.255.0，网关设置为192.168.1.1，DNS设置为8.8.8.8。请注意，此代码需要管理员权限才能运行。