c# - Querying an LDAP

Question

I haven't worked with an LDAP before so I am a bit lost. I need to connect to an LDAP source find a specific attribute and change it. The input for the program is a CSV file with a list of users. The program is supposed to read the UID from the CSV file find the record in the LDAP and replace a certain attribute. I haven't a clue how to do this. Could any one point me in the right direction please?

Answer 1

@KenL Almost got me there. I also had to set the AuthenticationType of the DirectoryEntry to get it to work. Also, pay attention to how you are using wildcards (Kleene Stars).

DirectoryEntry rootEntry = new DirectoryEntry("LDAP://some.ldap.server.com");
rootEntry.AuthenticationType = AuthenticationTypes.None; //Or whatever it need be
DirectorySearcher searcher = new DirectorySearcher(rootEntry);
var queryFormat = "(&(objectClass=user)(objectCategory=person)(|(SAMAccountName=*{0}*)(cn=*{0}*)(gn=*{0}*)(sn=*{0}*)(email=*{0}*)))";
searcher.Filter = string.Format(queryFormat, searchString);
foreach(SearchResult result in searcher.FindAll()) 
{
    Console.WriteLine("account name: {0}", result.Properties["samaccountname"].Count > 0 ? result.Properties["samaccountname"][0] : string.Empty);
    Console.WriteLine("common name: {0}", result.Properties["cn"].Count > 0 ? result.Properties["cn"][0] : string.Empty);
}