C# 在标签上显示首选DNS和备用DNS

我希望能够通过标签显示当前首选DNS和备用DNS

    private void Form1_Load(object sender, EventArgs e)
    {
        NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
        foreach (NetworkInterface adapter in adapters)
        {

            IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
            IPAddressCollection dnsServers = adapterProperties.DnsAddresses;
            if (dnsServers.Count > 0)
            {
                Console.WriteLine(adapter.Description);
                foreach (IPAddress dns in dnsServers)
                {
                    label4.Text = dns.ToString();
                }

            }
        }
    }

我该怎么做

    private void Form1_Load(object sender, EventArgs e)
    {
        NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
        foreach (NetworkInterface adapter in adapters)
        {

            IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
            IPAddressCollection dnsServers = adapterProperties.DnsAddresses;
            if (dnsServers.Count > 0)
            {
                Console.WriteLine(adapter.Description);
                foreach (IPAddress dns in dnsServers)
                {
                    label4.Text = dns.ToString();
                }

            }
        }
    }

我已经调查过了，看来我必须使用

    private void Form1_Load(object sender, EventArgs e)
    {
        NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
        foreach (NetworkInterface adapter in adapters)
        {

            IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
            IPAddressCollection dnsServers = adapterProperties.DnsAddresses;
            if (dnsServers.Count > 0)
            {
                Console.WriteLine(adapter.Description);
                foreach (IPAddress dns in dnsServers)
                {
                    label4.Text = dns.ToString();
                }

            }
        }
    }

管理对象搜索器？使用WMI

    private void Form1_Load(object sender, EventArgs e)
    {
        NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
        foreach (NetworkInterface adapter in adapters)
        {

            IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
            IPAddressCollection dnsServers = adapterProperties.DnsAddresses;
            if (dnsServers.Count > 0)
            {
                Console.WriteLine(adapter.Description);
                foreach (IPAddress dns in dnsServers)
                {
                    label4.Text = dns.ToString();
                }

            }
        }
    }

什么样的

ManagementObjectSearcher mos = new ManagementObjectSearcher("select * from Win32_NetworkAdapter Where AdapterType='DnsForestName'");
foreach (ManagementObject mo in mos.Get())
{
    label1.Text = mos.ToString();
}

    private void Form1_Load(object sender, EventArgs e)
    {
        NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
        foreach (NetworkInterface adapter in adapters)
        {

            IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
            IPAddressCollection dnsServers = adapterProperties.DnsAddresses;
            if (dnsServers.Count > 0)
            {
                Console.WriteLine(adapter.Description);
                foreach (IPAddress dns in dnsServers)
                {
                    label4.Text = dns.ToString();
                }

            }
        }
    }

---

您可能需要查看以下-

i接口属性。dnsaddress

Property

    private void Form1_Load(object sender, EventArgs e)
    {
        NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
        foreach (NetworkInterface adapter in adapters)
        {

            IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
            IPAddressCollection dnsServers = adapterProperties.DnsAddresses;
            if (dnsServers.Count > 0)
            {
                Console.WriteLine(adapter.Description);
                foreach (IPAddress dns in dnsServers)
                {
                    label4.Text = dns.ToString();
                }

            }
        }
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
        foreach (NetworkInterface adapter in adapters)
        {

            IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
            IPAddressCollection dnsServers = adapterProperties.DnsAddresses;
            if (dnsServers.Count > 0)
            {
                Console.WriteLine(adapter.Description);
                foreach (IPAddress dns in dnsServers)
                {
                    label4.Text = dns.ToString();
                }

            }
        }
    }

该文档提供了一个很好的示例，说明如何枚举所有网络接口及其DNS IP地址。。但正如我在对你的问题的评论中所说。。如果您有多个网络接口，则必须定义选择感兴趣网络接口的标准

    private void Form1_Load(object sender, EventArgs e)
    {
        NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
        foreach (NetworkInterface adapter in adapters)
        {

            IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
            IPAddressCollection dnsServers = adapterProperties.DnsAddresses;
            if (dnsServers.Count > 0)
            {
                Console.WriteLine(adapter.Description);
                foreach (IPAddress dns in dnsServers)
                {
                    label4.Text = dns.ToString();
                }

            }
        }
    }

---

请注意，我不能100%确定此属性返回dnsaddress的顺序是主Dns，后面是0或更多次Dns。。我猜是这样的，但据我所知，没有任何文档可以证实这一假设。

我可以用这段代码做我想做的事情

    private void Form1_Load(object sender, EventArgs e)
    {
        NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
        foreach (NetworkInterface adapter in adapters)
        {

            IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
            IPAddressCollection dnsServers = adapterProperties.DnsAddresses;
            if (dnsServers.Count > 0)
            {
                Console.WriteLine(adapter.Description);
                foreach (IPAddress dns in dnsServers)
                {
                    label4.Text = dns.ToString();
                }

            }
        }
    }

---

您是否关心您获取DNS地址的连接，例如电缆或WiFi？是的，我希望首选DNS或替代DNS可以安全地假设运行代码的机器只有一个网络接口？如果可以有多个网络接口，第一个问题是，您选择正确网络接口的标准是什么？是的，只有一个网络接口，但是如果它有两个，请选择局域网连接。