是否可以在不使用 win32 API 库的情况下在 C# 中获取 LAN 中连接的 IP 地址列表？

Question

我正在尝试获取连接在 LAN 中的 IP 地址列表， 是否可以不使用win32 API库。（Netapi32.dll）。 不使用非托管 win32 动态库的任何想法。目标为 Windows 7 操作系统

Answer 1

您可以使用NetworkInterface 对象来获取所有机器的网络接口。

var networkCards = System.Net.NetworkInterface.GetAllNetworkInterfaces();
foreach(var card in networkCards)
    Console.WriteLine(card.GetPhysicalAddress());

Answer 2

如果您收到响应，则可以使用System.Net.NetworkInformation.Ping ping 子网中的每个 IP，即有一台机器正在使用该 IP。如果您没有得到 ip 可用的响应，或者机器忽略 ping。

更新为添加代码以并行执行此操作。

public string IPList()
        {
            string myipsplit = string.Empty;
            string localhostname = Dns.GetHostName();
            IPAddress[] paddresses = Dns.GetHostAddresses(localhostname);
            string myip = paddresses.Where( ip => ip.AddressFamily == AddressFamily.InterNetwork).FirstOrDefault().ToString();
            string[] myiparray = myip.Split(new[] { '.' });
            for (int j = 1; j < myiparray.Length; j++)
                myipsplit += myiparray[j - 1] + ".";
            Trace.WriteLine(DateTime.Now);
            var results = new string[0x100];
            System.Threading.Tasks.Parallel.For(1, 0x100, id =>
                           {
                              var pingSender = new Ping();
                              string ls = myipsplit + id;
                              PingReply reply = pingSender.Send(ls, 100);
                              if (reply != null)
                                    if (reply.Status == IPStatus.Success)
                                        results[id] = reply.Address.ToString();
                            });

            Trace.WriteLine(DateTime.Now);
            var sb = new StringBuilder();
            results.All(x => { sb.AppendFormat("{0} ", x);
                                 return true;
            });
            return sb.ToString();
        }

更新为 .Net 2.0

private delegate void MyPing(int id);
        public string IPList2()
        {

            string myipsplit = string.Empty;
            string localhostname = Dns.GetHostName();
            IPAddress[] paddresses = Dns.GetHostAddresses(localhostname);
            string myip = paddresses.Where(ip => ip.AddressFamily == AddressFamily.InterNetwork).FirstOrDefault().ToString();
            string[] myiparray = myip.Split(new[] { '.' });
            for (int j = 1; j < myiparray.Length; j++)
                myipsplit += myiparray[j - 1] + ".";
            Trace.WriteLine(DateTime.Now);
            var results = new string[0x100];
            MyPing ping = 
             id =>
            {
                string ls = myipsplit + id;
                var pingSender = new Ping();
                PingReply reply = pingSender.Send(ls, 100);
                if (reply != null)
                    if (reply.Status == IPStatus.Success)
                        results[id] = reply.Address.ToString();
            };
            var asyncResults = new IAsyncResult[0x100];
            for (int i = 1; i < 0x100; i++)
            {
                asyncResults[i] = ping.BeginInvoke(i, null, null);
            }
            for (int i = 1; i < 0x100; i++)
            {
                ping.EndInvoke(asyncResults[i]);
            }
            Trace.WriteLine(DateTime.Now);
            var sb = new StringBuilder();
            for (int i = 1; i < 0x100; i++)
            {
                if (results[i]!=null)
                    sb.AppendFormat("{0} ", results[i]);
            }
            return sb.ToString();
        }

Answer 3

public string IPList()
        {
            var pingSender = new Ping();
            string port = string.Empty;
            string myipsplit = string.Empty;
            string localhostname = Dns.GetHostName();
            IPAddress[] paddresses = Dns.GetHostAddresses(localhostname);
            string myip = paddresses[0].ToString();
            string[] myiparray = myip.Split(new[] {'.'});
            for (int j = 1; j < myiparray.Length; j++)
                myipsplit += myiparray[j - 1] + ".";
            Trace.WriteLine(DateTime.Now);
            for (int i = 0; i < 0x100; i++)
            {
                string ls = myipsplit + i;
                PingReply reply = pingSender.Send(ls, 0);
                if (reply != null)
                    if (reply.Status == IPStatus.Success)
                        port += reply.Address + "+";
            }
            Trace.WriteLine(DateTime.Now);
            return port;
        }