Skift af IP

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Windows.Forms;
using System.IO;
using System.Net;
using System.Net.NetworkInformation;
using System.Management;

static class ChangeIP
{
    static TextBox txtOctet1;
    static ComboBox cboNet;
    static ComboBox cbo1;
    static ComboBox cbo2;
    static ComboBox cbo3;
    static TextBox txtIp;
    static List<Part> sites;

    static void Main()
    {
        string filename = "data.txt";

        string[] args = Environment.GetCommandLineArgs();
        if (args.Length == 2) filename = args[1]; // filnavn medsendt fra bruger

        int x = 100, y = 5;
        int cboWidth = 350;

        Form frm = new Form();
        frm.StartPosition = FormStartPosition.CenterScreen;
        frm.FormBorderStyle = FormBorderStyle.FixedDialog;
        frm.MaximizeBox = false;
        frm.Text = "Skift af IP";

        cboNet = new ComboBox();
        cboNet.DropDownStyle = ComboBoxStyle.DropDownList;
        cboNet.Left = x;
        cboNet.Top = y;
        cboNet.Width = cboWidth;

        txtOctet1 = new TextBox();
        txtOctet1.Width = 50;
        txtOctet1.Left = x;
        txtOctet1.Top = cboNet.Bottom + 2;
        txtOctet1.ReadOnly = true;
        txtOctet1.TabStop = false;

        cbo1 = new ComboBox();
        cbo2 = new ComboBox();
        cbo3 = new ComboBox();
        cbo1.Tag = "cbo1";
        cbo1.SelectedIndexChanged += cbo_SelectedIndexChanged;
        cbo2.SelectedIndexChanged += cbo_SelectedIndexChanged;
        cbo3.SelectedIndexChanged += cbo_SelectedIndexChanged;

        cbo1.DropDownStyle = cbo2.DropDownStyle = cbo3.DropDownStyle = ComboBoxStyle.DropDownList;
        cbo1.Left = cbo2.Left = cbo3.Left = x;
        cbo1.Width = cbo2.Width = cbo3.Width = cboWidth;
        cbo1.Top = txtOctet1.Bottom + 2;
        cbo2.Top = cbo1.Bottom + 2;
        cbo3.Top = cbo2.Bottom + 2;

        txtIp = new TextBox();
        txtIp.Width = 120;
        txtIp.Left = cbo1.Left;
        txtIp.Top = cbo3.Bottom + 2;
        txtIp.ReadOnly = true;

        Label lbl0 = new Label();
        Label lbl1 = new Label();
        Label lbl2 = new Label();
        Label lbl3 = new Label();
        Label lbl4 = new Label();
        lbl0.Top = cboNet.Top;
        lbl1.Top = cbo1.Top;
        lbl2.Top = cbo2.Top;
        lbl3.Top = cbo3.Top;
        lbl4.Top = txtIp.Top;
        lbl0.Text = "Netkort:";
        lbl1.Text = "Landsdel:";
        lbl2.Text = "SiteID:";
        lbl3.Text = "TeknikerNR:";
        lbl4.Text = "IP-adresse:";

        Button cmd = new Button();
        cmd.Click += cmd_Click;
        cmd.Text = "Skift IP";
        cmd.Left = x;
        cmd.Top = txtIp.Bottom + 12;
        cmd.Width = cboWidth;
        cmd.Height = 50;

        frm.Controls.Add(cboNet);
        frm.Controls.Add(txtOctet1);
        frm.Controls.Add(cbo1);
        frm.Controls.Add(cbo2);
        frm.Controls.Add(cbo3);
        frm.Controls.Add(lbl0);
        frm.Controls.Add(lbl1);
        frm.Controls.Add(lbl2);
        frm.Controls.Add(lbl3);
        frm.Controls.Add(lbl4);
        frm.Controls.Add(txtIp);
        frm.Controls.Add(cmd);

        frm.ClientSize = new System.Drawing.Size(cbo1.Right + 5, cmd.Bottom + 5); // bredde,højde

        // net...
        foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
        {
            if (nic.NetworkInterfaceType == NetworkInterfaceType.Ethernet)
            {
                cboNet.Items.Add(new NicInfo(nic));
            }
        }

        if (cboNet.Items.Count > 0) cboNet.SelectedIndex = 0; // vælg første netkort som standard

        // hent data fra fil...
        try
        {
            sites = new List<Part>();
            Regex re = new Regex(@"^(\d+)=(\d+)(?:.(?:(\d+).)?(.*))?");

            using (StreamReader sr = new StreamReader(filename))
            {
                while (sr.Peek() >= 0)
                {
                    Match m = re.Match(sr.ReadLine());
                    if (m.Success)
                    {
                        switch (m.Groups[1].Value)
                        {
                            case "0": txtOctet1.Text = m.Groups[2].Value; break;
                            case "1": cbo1.Items.Add(new Part(m.Groups[4].Value, m.Groups[2].Value, m.Groups[3].Value)); break;
                            case "3": cbo3.Items.Add(new Part(m.Groups[4].Value, m.Groups[2].Value)); break;
                            default:
                                // ting til den dynamiske liste
                                sites.Add(new Part(m.Groups[4].Value, m.Groups[2].Value, m.Groups[1].Value));
                                break;
                        }
                    }
                }
            }
        }
        catch(IOException ex)
        {
            MessageBox.Show("FEJL!\n" + ex.Message);
            return;
        }

        if (frm.ShowDialog() == DialogResult.OK)
        {

        }
    }

    static void cmd_Click(object sender, EventArgs e)
    {
        // skift ip

        if (cboNet.SelectedIndex < 0) return;
        IPAddress ip;
        if (!IPAddress.TryParse(txtIp.Text, out ip))
        {
            MessageBox.Show("Fejl i ip-adresse");
            return;
        }

        try
        {
            var nicInfo = cboNet.SelectedItem as NicInfo;
            NetworkInterface nic = nicInfo.Nic;
            ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection moc = mc.GetInstances();

            foreach (ManagementObject mo in moc)
            {
                if (mo["SettingID"].ToString() != nic.Id) continue;

                ManagementBaseObject newIp = mo.GetMethodParameters("EnableStatic");
                newIp["IPAddress"] = new string[] { txtIp.Text };
                newIp["SubnetMask"] = new string[] { nicInfo.Mask };

                ManagementBaseObject setIp = mo.InvokeMethod("EnableStatic", newIp, null);
                var ret = (UInt32)setIp["ReturnValue"];
                switch (ret)
                {
                    case 0: MessageBox.Show("Din ip-adresse er nu ændret"); break;
                    case 1: MessageBox.Show("Ændring træder i kraft efter genstart"); break;
                    case 64: MessageBox.Show("Dit styresystem er ikke understøttet"); break;
                    case 66: MessageBox.Show("Invalid subnet-maske"); break;
                    case 70: MessageBox.Show("Invalid ip"); break;
                    case 91: MessageBox.Show("Adgang nægtet"); break;
                    case 2147749891: MessageBox.Show("Mangler rettigheder til at ændre ip"); break;
                    case 2147786788: MessageBox.Show("Lock-fejl. Se evt. KB950134"); break;
                    default: MessageBox.Show("Der opstod en ukendt fejl: " + ret.ToString()); break;
                }
                break;
            }
        }catch(Exception ex)
        {
            MessageBox.Show("Fejl ved ændring af ip-adresse!\r\n" + ex.Message);
        }
    }

    static void cbo_SelectedIndexChanged(object sender, EventArgs e)
    {
        var cbo = sender as ComboBox;
        if (cbo.Tag != null && (string)cbo.Tag == "cbo1")
        {
            // liste 2 skal ændre sig efter liste 1
            cbo2.Items.Clear();
            var part = cbo1.SelectedItem as Part;

            foreach (var subpart in sites.Where(x => x.SubPart == part.SubPart))
            {
                cbo2.Items.Add(subpart);
            }
        }

        if (cbo1.SelectedIndex < 0) return;
        if (cbo2.SelectedIndex < 0) return;
        if (cbo3.SelectedIndex < 0) return;

        string oct2 = (cbo1.Items[cbo1.SelectedIndex] as Part).Value;
        string oct3 = (cbo2.Items[cbo2.SelectedIndex] as Part).Value;
        string oct4 = (cbo3.Items[cbo3.SelectedIndex] as Part).Value;

        txtIp.Text = string.Format("{0}.{1}.{2}.{3}", txtOctet1.Text, oct2, oct3, oct4);
    }

    class NicInfo
    {
        public NetworkInterface Nic { get; set; }
        public string Name;
        public string Mask;

        public NicInfo(NetworkInterface nic)
        {
            this.Nic = nic;
            this.Name = nic.Name;

            var addresses = nic.GetIPProperties().UnicastAddresses;
            foreach (var addr in addresses)
            {
                if (addr.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork) // ipv4
                {
                    string ip = addr.Address.ToString();
                    Mask = addr.IPv4Mask.ToString();
                    Name += " (" + ip + ")"; // vis ip
                    break;
                }
            }
        }
        public override string ToString()
        {
            return Name;
        }
    }

    class Part
    {
        public string Name { get; set; }
        public string Value { get; set; }
        public string SubPart { get; set; }

        public Part(string name, string value, string subPart = null)
        {
            this.Name = name;
            this.Value = value;
            this.SubPart = subPart;
        }

        public override string ToString()
        {
            return Name;
        }
    }
}