Search through Windows Active Directory

Search through Windows Active Directory

How to search through Windows Active Directory is a topic
that will be presented in this post by writing some simple functions.

using System.DirectoryServices;

using System.Collections.Generic;

using System;

namespace photointeraction

{
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///// Description: Simple functions to search through 
///// Microsoft Windows Active Directory
///// Author: G. R. Roosta
///// License: Free To Use (No Restriction)

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public static class Integerphoto

{

/// <summary> 
/// Authenticate user against a domain.
 /// </summary> 
/// <param name="loginName"></param>
 /// <param name="domainPath"></param>
 /// <returns></returns>
public static bool AuthenticateUser(string loginName, string domainPath){string userName = loginName.Substring(loginName.LastIndexOf('\\') + 1);DirectoryEntry searchRoot = new DirectoryEntry(domainPath);DirectorySearcher search = new DirectorySearcher(searchRoot);search.Filter = String.Format("(&(objectClass=user)(objectCategory=person)(SAMAccountName={0}))", userName);search.PropertiesToLoad.Add("cn");SearchResult result = search.FindOne();return result != null;}

/// <summary>/// Check if a user login exists is in the current/// Windows Active Directory./// </summary>/// <param name="loginName"></param>/// <returns></returns>public static bool CheckLogin(string loginName){string userName = loginName.Substring(loginName.LastIndexOf('\\') + 1);DirectorySearcher search = new DirectorySearcher();search.Filter = String.Format("(SAMAccountName={0})", userName);search.PropertiesToLoad.Add("cn");SearchResult result = search.FindOne();return result != null;}

/// <summary>

/// Retrieve list of all users in a domain./// </summary>/// <param name="domainPath">domainPath is set like "LDAP://DomainName"</param>/// <returns></returns>public static List<string> GetDomainUsers(string domainPath){List<string> rtn = new List<string>();DirectoryEntry searchRoot = new DirectoryEntry(domainPath);DirectorySearcher search = new DirectorySearcher(searchRoot);search.Filter = "(&(objectClass=user)(objectCategory=person))";search.PropertiesToLoad.Add("samaccountname");SearchResult result;SearchResultCollection resultCol = search.FindAll();if (resultCol != null){for (int counter = 0; counter < resultCol.Count; counter++){result = resultCol[counter];if (result.Properties.Contains("samaccountname")){rtn.Add((String)result.Properties["samaccountname"][0]);}}}return rtn;}

/// <summary>

/// Return list of users of an Active Directory group./// </summary>/// <param name="groupName"></param>/// <returns></returns>public static List<string> GetGroupUsers(string groupName){List<string> rtn = new List<string>();SearchResult result;DirectorySearcher search = new DirectorySearcher();search.Filter = String.Format("(cn={0})", groupName);search.PropertiesToLoad.Add("member");result = search.FindOne();if (result != null){for (int counter = 0; counter < result.Properties["member"].Count; counter++)

{

string user = (string)result.Properties["member"][counter];rtn.Add(user);

}

}return rtn;

}

}

}