DNS设置为“自动获得”编程 [英] Set DNS to 'Obtain automatically' programmatically

问题描述

使用C＃.NET的，我怎么设置DNS服务器为自动获得？我可以设置IP地址所需的值是这样的。

Using C# on .NET, how do I set the DNS servers to 'Obtain automatically'? I can set the IP addresses to desired values like this.

ManagementClass mClass = new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection mObjCol = mClass.GetInstances();
foreach (ManagementObject mObj in mObjCol)
{
  if ((bool)mObj["IPEnabled"])
  {
     ManagementBaseObject mboDNS = mObj.GetMethodParameters("SetDNSServerSearchOrder");
     if (mboDNS != null)
     {
        //Assume X.X.X.X and X.X.X.X are the IPs.
        string[] sIPs = { "X.X.X.X", "X.X.X.X" };
        mboDNS["DNSServerSearchOrder"] = sIPs;
        mObj.InvokeMethod("SetDNSServerSearchOrder", mboDNS, null);
     }
  }
}

我已经试过同时设置IP地址为空，如 SIPS = {NULL，NULL}; ，但最终没有改变设置在所有

I've tried setting both IPs to null, like sIps = { null, null };, but that ends up not changing the settings at all.

推荐答案

尝试使用空字符串数组设置DNSServerSearchOrder的为null，而不是。

Try setting DNSServerSearchOrder to null instead of using an array of null strings.

ManagementClass mClass = new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection mObjCol = mClass.GetInstances();
foreach (ManagementObject mObj in mObjCol)
{
  if ((bool)mObj["IPEnabled"])
  {
     ManagementBaseObject mboDNS = mObj.GetMethodParameters("SetDNSServerSearchOrder");
     if (mboDNS != null)
     {
        mboDNS["DNSServerSearchOrder"] = null;
        mObj.InvokeMethod("SetDNSServerSearchOrder", mboDNS, null);
     }
  }
}

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