通过计算机名称C＃AD获取DNS名称

Question

I'm trying to figure out how I can get a DNS name field from Active Directory in my C# Windows Forms application. I have a computer name, and I wants to get the DNS name of this computer from Active directory. Any suggestions?

Answer 1

The DNS name is stored in an attribute called dNSHostName on the AD object for the computer, so you need to find the object in AD and read that attribute.

Here's an example, where the variable computerName has the computer name.

var search = new DirectorySearcher {
    Filter = $"(&(objectCategory=computer)(sAMAccountName={computerName}$))"
};
search.PropertiesToLoad.Add("dNSHostName");
var result = search.FindOne();

var dnsName = result.Properties["dNSHostName"][0].ToString();

I'm not setting SearchRoot in the DirectorySearcher here, so this will only search the current domain you're logged into.