LDAP Authentication

Question

Hi,

I am badly stucked in implementing LDAP Authentication.

 

My moto is to find OU or(Groups) based on Username.Means find a particular group for user based on Username.I am trying below way but not getting what I expecting.Since, my credentials are valid it throws an exception "The user name or password is incorrect.":

 

Snap 1:

DirectoryEntry entry = new DirectoryEntry("LDAP://IP Address:Port/CN=Users,DC=domain,DC=com",username,password);
DirectorySearcher ds = new DirectorySearcher(entry);
ds.Filter = "(&(objectClass=user)(cn=" + username + "))";
SearchResult results = ds.FindOne();

 Snap 2 :

The below code snippet works fine but it only confirms Authentication for me:

using (LdapConnection ldap = new LdapConnection(ConfigurationManager.ConnectionStrings["ADConnectionString"].ConnectionString))
               {
                   ldap.AuthType = AuthType.Basic;
                   ldap.SessionOptions.ProtocolVersion = 3;
                   // Distinguished name is reuired to pass to the bind method
                   string distinguishedName = "cn=" + username + ",ou=Users,dc=domain,dc=com";
                   ldap.Bind(new NetworkCredential(distinguishedName, password));
                }

Please Correct Me ! As I am New to LDAP I don't know whats the replacement code for above circumstance.

 

1. Can I use any LDAP conection object or property so that I need not create any DirectoryEntry parameter (String Path,String Username,String password) ?

2. I have pair of two credentials set. One for Connection string to LDAP server and second one is for user. I tried both . But didn't find any way out.

3. How to create connection string for LDAP  or DirectoryEntry as connection parameter.?

Thanks In advance.