如何在Windows 10上使用C#更改DNS

Question

我正在尝试通过VB.NET更改Windows 10上的DNS.

我有适用于Windows 7的代码,但它在Windows 10上不起作用.

以下是我更改DNS的Windows 7代码:

ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection moc = mc.GetInstances();
foreach (ManagementObject mo in moc)
{
    if ((bool)mo["IPEnabled"])
    {
        ManagementBaseObject objdns = mo.GetMethodParameters("SetDNSServerSearchOrder");
        if (objdns != null)
        {
            string[] s = { "192.168.XX.X", "XXX.XX.X.XX" };
            objdns["DNSServerSearchOrder"] = s;
            mo.InvokeMethod("SetDNSServerSearchOrder", objdns, null);

我的问题是,如何让它在Windows 10操作系统上运行？

Answer 1

首先，您需要获取要设置/取消设置DNS的NetworkInterface

我已经在最新版本的Windows 10上测试了此代码，它的工作原理很吸引人！

这是查找活动的以太网或Wifi网络的代码（并非100％准确，但在大多数情况下很有用）

public static NetworkInterface GetActiveEthernetOrWifiNetworkInterface()
{
    var Nic = NetworkInterface.GetAllNetworkInterfaces().FirstOrDefault(
        a => a.OperationalStatus == OperationalStatus.Up &&
        (a.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 || a.NetworkInterfaceType == NetworkInterfaceType.Ethernet) &&
        a.GetIPProperties().GatewayAddresses.Any(g => g.Address.AddressFamily.ToString() == "InterNetwork"));

    return Nic;
}

设置DNS

public static void SetDNS(string DnsString)
{
    string[] Dns = { DnsString };
    var CurrentInterface = GetActiveEthernetOrWifiNetworkInterface();
    if (CurrentInterface == null) return;

    ManagementClass objMC = new ManagementClass("Win32_NetworkAdapterConfiguration");
    ManagementObjectCollection objMOC = objMC.GetInstances();
    foreach (ManagementObject objMO in objMOC)
    {
        if ((bool)objMO["IPEnabled"])
        {
            if (objMO["Description"].ToString().Equals(CurrentInterface.Description))
            {
                ManagementBaseObject objdns = objMO.GetMethodParameters("SetDNSServerSearchOrder");
                if (objdns != null)
                {
                    objdns["DNSServerSearchOrder"] = Dns;
                    objMO.InvokeMethod("SetDNSServerSearchOrder", objdns, null);
                }
            }
        }
    }
}

取消设定DNS

public static void UnsetDNS()
{
    var CurrentInterface = GetActiveEthernetOrWifiNetworkInterface();
        if (CurrentInterface == null) return;

    ManagementClass objMC = new ManagementClass("Win32_NetworkAdapterConfiguration");
    ManagementObjectCollection objMOC = objMC.GetInstances();
    foreach (ManagementObject objMO in objMOC)
    {
        if ((bool)objMO["IPEnabled"])
        {
            if (objMO["Description"].ToString().Equals(CurrentInterface.Description))
            {
                ManagementBaseObject objdns = objMO.GetMethodParameters("SetDNSServerSearchOrder");
                if (objdns != null)
                {
                    objdns["DNSServerSearchOrder"] = null;
                    objMO.InvokeMethod("SetDNSServerSearchOrder", objdns, null);
                }
            }
        }
    }
}

用法

SetDNS("127.0.0.1");

Answer 2

对于 Windows 10，您可能首先需要进行身份验证。将 ConnectionOptions 实例传递给 ManagementScope 构造函数，定义您的身份验证和模拟属性。

尝试这个：

// Method to prepare the WMI query connection options.
public static ConnectionOptions PrepareOptions ( )
{
  ConnectionOptions options = new ConnectionOptions ( );
  options . Impersonation = ImpersonationLevel . Impersonate;
  options . Authentication = AuthenticationLevel . Default;
  options . EnablePrivileges = true;
  return options;
}

// Method to prepare WMI query management scope.
public static ManagementScope PrepareScope ( string machineName , ConnectionOptions options , string path  )
{
  ManagementScope scope = new ManagementScope ( );
  scope . Path = new ManagementPath ( @"\\" + machineName + path );
  scope . Options = options;
  scope . Connect ( );
  return scope;
}

// Set DNS.
ConnectionOptions options = PrepareOptions ( );
ManagementScope scope = PrepareScope ( Environment . MachineName , options , @"\root\CIMV2" );
ManagementClass mc = new ManagementClass(scope, "Win32_NetworkAdapterConfiguration");
ManagementObjectCollection moc = mc.GetInstances();
foreach (ManagementObject mo in moc)
{
    if ((bool)mo["IPEnabled"])
    {
        ManagementBaseObject objdns = mo.GetMethodParameters("SetDNSServerSearchOrder");
        if (objdns != null)
        {
            string[] s = { "192.168.XX.X", "XXX.XX.X.XX" };
            objdns["DNSServerSearchOrder"] = s;
            mo.InvokeMethod("SetDNSServerSearchOrder", objdns, null);

基于这个答案：

升级到 Windows 10 后 WMI 不工作