在C＃中，如何访问Active Directory以获取某个用户所属的组的列表？

Question

在C＃中，我如何访问Active Directory以获取某个用户所属的组的列表？

用户详细信息采用以下形式：

"MYDOMAIN\myuser"

我一直在按照这里的说明进行操作，但是只有在我在表格中输入用户详细信息时，它们才起作用：

"LDAP://sample.com/CN=MySurname MyFirstname,OU=General,OU=Accounts,DC=sample,DC=com"

因此，也许我要问的是，如何从第一个较短的表格转换为下面的完全合格表格？

非常感谢！

Answer 1

这可能会帮助...

using System.Collections;
using System.DirectoryServices;

/// <summary>
/// Gets the list of AD groups that a user belongs to
/// </summary>
/// <param name="loginName">The login name of the user (domain\login or login)</param>
/// <returns>A comma delimited list of the user's AD groups</returns>
public static SortedList GetADGroups(string loginName)
{
    if (string.IsNullOrEmpty(loginName))
        throw new ArgumentException("The loginName should not be empty");

    SortedList ADGroups = new SortedList();

    int backSlash = loginName.IndexOf("\\");
    string userName = backSlash > 0 ? loginName.Substring(backSlash + 1) : loginName;

    DirectoryEntry directoryEntry = new DirectoryEntry();
    DirectorySearcher directorySearcher = new DirectorySearcher(directoryEntry, "(sAMAccountName=" + userName + ")");

    SearchResult searchResult = directorySearcher.FindOne();
    if (null != searchResult)
    {
        DirectoryEntry userADEntry = new DirectoryEntry(searchResult.Path);

        // Invoke Groups method.
        object userADGroups = userADEntry.Invoke("Groups");
        foreach (object obj in (IEnumerable)userADGroups)
        {
            // Create object for each group.
            DirectoryEntry groupDirectoryEntry = new DirectoryEntry(obj);
            string groupName = groupDirectoryEntry.Name.Replace("cn=", string.Empty);
            groupName = groupName.Replace("CN=", string.Empty);
            if (!ADGroups.ContainsKey(groupName))
                ADGroups.Add(groupName, groupName);
        }
    }

    return ADGroups;
}

Answer 2

最后，我不得不从相反的角度来研究它，因为我必须验证来自单独（受信任）森林的成员。 因此，以下是查找给定组成员列表的代码：

/// <summary>
/// Finds the users in the given group. Eg groupName=My-Group-Name-Blah
/// returns an array of users eg: DOMAIN\user
/// </summary>
string[] UsersInGroup(string groupName)
{
  List<String> users = new List<string>();

  // First, find the group:
  string query = string.Format("(CN={0})", groupName);
  SearchResult searchResult = new DirectorySearcher(query).FindOne();
  DirectoryEntry group = new DirectoryEntry(searchResult.Path);

  // Find all the members
  foreach (object rawMember in (IEnumerable)group.Invoke("members"))
  {
    // Grab this member's SID
    DirectoryEntry member = new DirectoryEntry(rawMember);
    byte[] sid = null;
    foreach (object o in member.Properties["objectSid"]) sid = o as byte[];

    // Convert it to a domain\user string
    try
    {
      users.Add(
        new SecurityIdentifier(sid, 0).Translate(typeof(NTAccount)).ToString());
    }
    catch { } // Some SIDs cannot be discovered - ignore these
  }

  return users.ToArray();
}