我有一些问题的代码,旨在通过搜索他们的电子邮件地址在Active Directory中查找用户.我已经尝试了2种方法,但有时我发现FindOne()方法在某些情况下不会返回任何结果.如果我在Outlook中查看GAL中的用户,请查看列出的SMTP电子邮件地址.
我的最终目标是确认该用户存在于AD中.我只有电子邮件地址作为搜索条件,所以没有办法使用名字或姓氏.
DirectorySearcher search = new DirectorySearcher(entry);
search.Filter = "(mail=" + email + ")";
search.PropertiesToLoad.Add("mail");
SearchResult result = search.FindOne();
DirectorySearcher search = new DirectorySearcher(entry);
search.Filter = "(proxyAddresses=SMTP:" + email + ")"; // I've also tried with =smtp:
search.PropertiesToLoad.Add("mail");
SearchResult result = search.FindOne();
解决方法
如果您使用Exchange Server,则proxyAddresses是获取其电子邮件地址的最可靠手段.主smtp地址由所有大写“SMTP：”指示,其他电子邮件地址将以小写“smtp：”作为前缀.属性“mail”不一定必须是主SMTP地址,尽管通常是这样.
以下是我使用的一些代码的变体：
public static SearchResult FindAccountByEmail(string email)
{
string filter = string.Format("(proxyaddresses=SMTP:{0})",email);
using (DirectoryEntry gc = new DirectoryEntry("GC:"))
{
foreach (DirectoryEntry z in gc.Children)
{
using (DirectoryEntry root = z)
{
using (DirectorySearcher searcher = new DirectorySearcher(root,filter,new string[] { "proxyAddresses","objectGuid","displayName","distinguishedName" }))
{
searcher.ReferralChasing = ReferralChasingOption.All;
SearchResult result = searcher.FindOne();
return result;
}
}
break;
}
}
return null;
}
static void Main(string[] args)
{
SearchResult result = FindAccountByEmail("someone@somewhere.com");
string distinguishedName = result.Properties["distinguishedName"][0] as string;
string name = result.Properties["displayName"] != null
? result.Properties["displayName"][0] as string
: string.Empty;
Guid adGuid = new Guid((byte[]) (result.Properties["objectGUID"][0]));
string emailAddress;
var emailAddresses = (from string z in result.Properties["proxyAddresses"]
where z.StartsWith("SMTP")
select z);
emailAddress = emailAddresses.Count() > 0 ? emailAddresses.First().Remove(0,5) : string.Empty;
Console.WriteLine(string.Format("{1}{0}\t{2}{0}\t{3}{0}\t{4}",Environment.NewLine,name,distinguishedName,adGuid,emailAddress));
}
