Question

我尝试使用DNS从DNS获取IP地址在{univeal c＃windows app。{/ 1>}中IPAddress[] ip = Dns.GetHostAddresses("www.google.com");

但它显示错误Error CS0103 The name 'Dns' does not exist in the current context

我在控制台应用程序中尝试过，它运行得很好。命名空间System.Net在win 10通用应用程序中不包含Dns。你能告诉我，问题或其他解决方案在哪里？

我的代码

using System.Net;
public MainPage()
{
    this.InitializeComponent();
}

private void button_Click(object sender, RoutedEventArgs e)
{
    string zaznam = In.Text;
    IPAddress[] ip = Dns.GetHostAddresses("www.google.com");
}

Answer 1

当您执行以下操作而不是ConsoleApp

时会发生什么

IPHostEntry ipHostEntry = Dns.GetHostEntry("www.google.com");

或者如果有更多的IP地址，您可以执行以下操作

IPAddress[] ips;
ips = Dns.GetHostAddresses("www.google.com");
Console.WriteLine("GetHostAddresses({0}) returns:", "google.com");//if you are passing in a hostname inside a method change this to hostname variable
foreach (IPAddress ip in ips)
{
    Console.WriteLine("    {0}", ip);
}

Universal APP尝试以下Microsoft.Phone.Net.NetworkInformation命名空间

public void DnsLookup(string hostname)
{
    var endpoint = new DnsEndPoint(hostname, 0);
    DeviceNetworkInformation.ResolveHostNameAsync(endpoint, OnNameResolved, null);  
}

private void OnNameResolved(NameResolutionResult result)
{
    IPEndPoint[] endpoints = result.IPEndPoints;
    // Do something with your endpoints
}

Answer 2

错误是正确的。 System.Net.Dns在.Net Framework for Windows Runtime中不可用。

您可以改为使用Windows运行时类：调用Windows.Networking.Sockets。DatagramSocket.GetEndpointPairsAsync然后检查返回的EndpointPairs

async Task ListEndpoints()
{
    HostName host = new HostName("www.stackoverflow.com");
    var eps = await DatagramSocket.GetEndpointPairsAsync(host, "80");
    foreach(EndpointPair ep in eps)
    {
        Debug.WriteLine("EP {0} {1}",new object[] { ep.LocalHostName, ep.RemoteHostName });
    }
}

c＃system.net.dns通用应用程序（W10）无法正常工作

2 个答案: