获取所有本地 IP 的 Ping 类问题

Question

我正在尝试获取连接到我的网络的设备的 IP（我连接到的 WLAN）。首先我在 Win8 中使用命令行并在知道我自己的 IP 的同时连续 ping 那里（每次递增并 ping）。要像WnetWatcher 那样以编程方式进行操作，我正在通过调用传递attempts=4 和timeout=3 的函数来使用Ping Class，但蓝屏显示PROCESS_HAS_BLOCKED_PAGES 和found 这是一个潜在的API 问题。任何人都有比这更好的主意来获取所有设备的 IP，因为 SO 的几个线程使用 Dns 类找到它，但这适用于单个 PC（我的）。

1)。 Ping 的后缀是什么，如果是 Ping 那么如何解决 API 问题。

2).另外，我怎样才能获得路由器 IP，以便我可以为网络上的其他 IP 运行循环，或者有更好的替代方案吗？

public static void Ping（字符串主机，int 尝试，int 超时） {

            new Thread(delegate()
            {
                try
                {
                    System.Net.NetworkInformation.Ping ping = new System.Net.NetworkInformation.Ping();
                    ping.PingCompleted += new PingCompletedEventHandler(PingCompleted);
                    ping.SendAsync(host, timeout, host);

                }
                catch
                {
                    // Do nothing and let it try again until the attempts are exausted.
                    // Exceptions are thrown for normal ping failurs like address lookup
                    // failed.  For this reason we are supressing errors.
                }
            }).Start();

    }
    private static void PingCompleted(object sender, PingCompletedEventArgs e)
    {
        string ip = (string)e.UserState;
        if (e.Reply != null && e.Reply.Status == IPStatus.Success)
        {
            // Logic for Ping Reply Success
          //  Console.WriteLine(String.Format("Host: {0} ping successful", ip));
            lstlocal.listViewItem //Error ...the intellisense is not accepting it here




        }
        else
        {
            // Logic for Ping Reply other than Success
        }
    }

       //function caller code from a button

        lstLocal.Items.Clear();

        lstLocal.FullRowSelect = true;
        bool value;
        for (int i = 0; i <= 254; i++)
              {

                        string ping_var = "192.168.1" + "." + i;
                        value = Ping(ping_var, 4, 3);
                        // MessageBox.Show("Ping response for"+ping_var +"is" + value);

                        if(value==true)
                        {
                           ListViewItem items=new ListViewItem(ping_var.ToString());
                           lstLocal.Items.Add(items);
                        }


             }

    }

Answer 1

1) 您可以调用 Ping 类的 SendAsync 方法而不是 Send 以避免阻塞：

public void Ping(string host, int attempts, int timeout)
{
    for (int i = 0; i < attempts; i++)
    {
        new Thread(delegate()
        {
            try
            {
                System.Net.NetworkInformation.Ping ping = new System.Net.NetworkInformation.Ping();
                ping.PingCompleted += new PingCompletedEventHandler(PingCompleted);
                ping.SendAsync(host, timeout, host);
            }
            catch
            {
                // Do nothing and let it try again until the attempts are exausted.
                // Exceptions are thrown for normal ping failurs like address lookup
                // failed.  For this reason we are supressing errors.
            }
        }).Start();
    }
}

并在 PingCompleted EventHandler 委托中处理 ping 响应：

private void PingCompleted(object sender, PingCompletedEventArgs e)
{
    string ip = (string)e.UserState;
    if (e.Reply != null && e.Reply.Status == IPStatus.Success)
    {
        // Logic for Ping Reply Success
        ListViewItem item = new ListViewItem(ip);
        if (this.InvokeRequired)
        {
            this.Invoke(new Action(() => 
            {
                lstLocal.Items.Add(item);
            }));
        }
        else
        {
            lstLocal.Items.Add(item);
        }
        // Logic for Ping Reply Success
        // Console.WriteLine(String.Format("Host: {0} ping successful", ip));
    }
    else
    {
        // Logic for Ping Reply other than Success
    }
}

2) 获取路由器 IP 或网关：

static string NetworkGateway()
{
    string ip = null;

    foreach (NetworkInterface f in NetworkInterface.GetAllNetworkInterfaces())
    {
        if (f.OperationalStatus == OperationalStatus.Up)
        {
            foreach (GatewayIPAddressInformation d in f.GetIPProperties().GatewayAddresses)
            {
                ip = d.Address.ToString();
            }
        }
    }

    Console.WriteLine(string.Format("Network Gateway: {0}", ip));
    return ip;
}