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Get Members of an Active Directory Distribution Group

/ Published in: C#
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This is very useful if you need to populate a dropdown.

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  1. // Get all users from an Active Directory distribution group
  2. public SortedList GetUsersInGroup(string domain, string group)
  3. {
  4.     SortedList groupMemebers = new SortedList();
  5.  
  6.     string sam = "";
  7.     string fname = "";
  8.     string lname = "";
  9.     string active = "";
  10.  
  11.     DirectoryEntry de = new DirectoryEntry("LDAP://DC=" + domain + ",DC=com");
  12.  
  13.     DirectorySearcher ds = new DirectorySearcher(de, "(objectClass=person)");
  14.     ds.Filter = "(memberOf=CN=" + group + ",OU=Distribution Groups,DC=" + domain + ",DC=com)";
  15.  
  16.     ds.PropertiesToLoad.Add("givenname");
  17.     ds.PropertiesToLoad.Add("samaccountname");
  18.     ds.PropertiesToLoad.Add("sn");
  19.     ds.PropertiesToLoad.Add("useraccountcontrol");
  20.  
  21.     foreach (SearchResult sr in ds.FindAll())
  22.     {
  23.         try
  24.         {
  25.             sam = sr.Properties["samaccountname"][0].ToString();
  26.             fname = sr.Properties["givenname"][0].ToString();
  27.             lname = sr.Properties["sn"][0].ToString();
  28.             active = sr.Properties["useraccountcontrol"][0].ToString();
  29.         }
  30.         catch (Exception e)
  31.         {
  32.         }
  33.  
  34.         // don't grab disabled users
  35.         if (active.ToString() != "514")
  36.         {
  37.             groupMemebers.Add(sam.ToString(), (fname.ToString() + " " + lname.ToString()));
  38.         }
  39.     }
  40.  
  41.     return groupMemebers;
  42. }

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