using System;
using System.Management;

public class ChangeIP
{
    private ManagementBaseObject iObj = null;
    private ManagementBaseObject oObj = null;
    private ManagementClass mc = new ManagementClass(“Win32_NetworkAdapterConfiguration“);
    private readonly ManagementObjectCollection moc;

    ///〈summary〉
    /// example:
    ///〈code〉
    /// ChangeIP o = new ChangeIP();
    /// string[] ipList = new string[]{“192.168.0.253“,“192.168.0.250“};
    /// string[] subnetList = new string[]{“255.255.255.0“,“255.255.255.0“};
    /// o.ChangeTo(ipList,subnetList);
    ///〈/code〉
    ///〈/summary〉
    public ChangeIP()
    {
        moc = mc.GetInstances();
    }

    ///〈summary〉cortrol〈/summary〉
    ///〈param name=“ipAddr“〉IPAddr List〈/param〉
    ///〈param name=“subnetMask“〉subnetMask List〈/param〉
    public void ChangeTo(string[] ipAddr, string[] subnetMask)
    {
        foreach (ManagementObject mo in moc)
        {
            if (!(bool)mo[“IPEnabled“]) continue;

            iObj = mo.GetMethodParameters(“EnableStatic“);
            iObj[“IPAddress“] = ipAddr;
            iObj[“SubnetMask“] = subnetMask;
            oObj = mo.InvokeMethod(“EnableStatic“, iObj, null);
        }
    }

    ///〈summary〉cortrol〈/summary〉
    ///〈param name=“ipAddr“〉IPAddr List〈/param〉
    ///〈param name=“subnetMask“〉subnetMask List〈/param〉
    ///〈param name=“gateways“〉gateway List〈/param〉
    ///〈param name=“gatewayCostMetric“〉gateway CostMetric List, example: 1〈/param〉
    public void ChangeTo(string[] ipAddr, string[] subnetMask, string[] gateways, string[] gatewayCostMetric)
    {
        foreach (ManagementObject mo in moc)
        {
            if (!(bool)mo[“IPEnabled“]) continue;

            iObj = mo.GetMethodParameters(“EnableStatic“);
            iObj[“IPAddress“] = ipAddr;
            iObj[“SubnetMask“] = subnetMask;
            oObj = mo.InvokeMethod(“EnableStatic“, iObj, null);

            iObj = mo.GetMethodParameters(“SetGateways“);
            iObj[“DefaultIPGateway“] = gateways;
            iObj[“GatewayCostMetric“] = gatewayCostMetric;
            oObj = mo.InvokeMethod(“SetGateways“, iObj, null);
        }
    }

    ///〈summary〉cortrol〈/summary〉
    ///〈param name=“ipAddr“〉IPAddr List〈/param〉
    ///〈param name=“subnetMask“〉subnetMask List〈/param〉
    ///〈param name=“gateways“〉gateway List〈/param〉
    ///〈param name=“gatewayCostMetric“〉gateway CostMetric List, example: 1〈/param〉
    ///〈param name=“dnsServer“〉DNSServer List〈/param〉
    public void ChangeTo(string[] ipAddr, string[] subnetMask, string[] gateways, string[] gatewayCostMetric, string[] dnsServer)
    {
        foreach (ManagementObject mo in moc)
        {
            if (!(bool)mo[“IPEnabled“]) continue;

            iObj = mo.GetMethodParameters(“EnableStatic“);
            iObj[“IPAddress“] = ipAddr;
            iObj[“SubnetMask“] = subnetMask;
            oObj = mo.InvokeMethod(“EnableStatic“, iObj, null);

            iObj = mo.GetMethodParameters(“SetGateways“);
            iObj[“DefaultIPGateway“] = gateways;
            iObj[“GatewayCostMetric“] = gatewayCostMetric;
            oObj = mo.InvokeMethod(“SetGateways“, iObj, null);

            iObj = mo.GetMethodParameters(“SetDNSServerSearchOrder“);
            iObj[“DNSServerSearchOrder“] = dnsServer;
            oObj = mo.InvokeMethod(“SetDNSServerSearchOrder“, iObj, null);
        }
    }

    ///〈summary〉DHCPEnabled〈/summary〉
    public void EnableDHCP()
    {
        foreach (ManagementObject mo in moc)
        {
            if (!(bool)mo[“IPEnabled“]) continue;

            if (!(bool)mo[“DHCPEnabled“])
            {
                iObj = mo.GetMethodParameters(“EnableDHCP“);
                oObj = mo.InvokeMethod(“EnableDHCP“, iObj, null);
            }
        }
    }
}