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c#active-directoryldap
Psth
Psth

Reputation: 300

How to search users in LDAP using LdapConnection object in C#?

I have requirement to search for users in a LDAP directory using C#. I can do it using DirectoryEntry and DirectorySearcher as shown in code below:

SearchResultCollection sResults = null;

DirectoryEntry dEntry = new DirectoryEntry(_LDAPConnectionString);

DirectorySearcher dSearcher = new DirectorySearcher(dEntry);    
dSearcher.Filter = String.Format("(&(objectClass=user)(cn={0}))", userName);

sResults = dSearcher.FindAll();

But the requirement is to create a LdapConnection object using a standard access user (always the same) as shown below. And use that particular LdapConnectionObject to search users using username. 

LdapConnection ldapConnectionObject = new LdapConnection(
                new LdapDirectoryIdentifier(_hostName, _port),
                null,
                AuthType.Basic);
ldapConnectionObject.Bind(accessUserCredential);

How do I use the above ldapConnectionObject to search for users?

Upvotes: 4

Views: 24255

Answers (1)

Psth
Psth

Reputation: 300

I found the answer searching using LdapConnection object. So we can use the SendRequest method of the LdapConnection class using the SearchRequest to get search response back. In below example, I have searched the user with uid userName and retreived its DN.

ldapConnection = new LdapConnection(
                new LdapDirectoryIdentifier(_hostName, _port),
                null,
                AuthType.Basic
                );

string searchFilter = String.Format("(&(objectClass=user)(uid={0}))", userName);

string userStore = "OU=WebsiteUsers,OU=InternalUsers";

SearchRequest searchRequest = new SearchRequest
                (userStore,
                 searchFilter,
                 System.DirectoryServices.Protocols.SearchScope.Subtree,
                 new string[] { "DistinguishedName" });

var response = (SearchResponse)ldapConnection.SendRequest(searchRequest);
string userDN = response.Entries[0].Attributes["DistinguishedName"][0].ToString();

Upvotes: 9

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