DirectorySearcher.findOne returns null

Question

User-510697852 posted

I am using LDAP authentication in my web application.

I am using following code,

string domainAndUsername = domain + @"\" + username;
            DirectoryEntry entry = new DirectoryEntry(_strLdapPath, domainAndUsername, pwd);

DirectorySearcher search = new DirectorySearcher(entry);

                search.Filter = "(samaccountname=" + username + ")";
                search.PropertiesToLoad.Add("cn");
               SearchResult result = search.FindOne();

I am getting reult as null.

How can I find exact reason why it's returning null.

Can I log something like result.tostring(); so will know the reason.

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It's working fine for some users. Returning null for some users. I want to find out why it's returning null.

Answer 1

User753101303 posted

Hi,

I would use a tool such as https://technet.microsoft.com/en-us/library/cc773354(v=ws.10).aspx to inspect a user I can't find and triple check username and  _strLdapPath is correct for this user (for now my guess is that the search criteria is just wrong).

Not directly related but if using 4.x you could use https://msdn.microsoft.com/en-us/library/bb344891(v=vs.110).aspx.