LDAP connection using PrincipalContext

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Hi,
I have to connect to local ldap which is on apache server. I use your code like this

C#

private string sDomain = "ldap://localhost:10389";
   private string sDefaultOU = "ou=users,ou=system";

   private string sServiceUser = @"uid=admin,ou=system";
   private string sServicePassword = "secret";

PrincipalContext oPrincipalContext = new PrincipalContext(ContextType.Domain, sDomain, sDefaultOU, sServiceUser, sServicePassword);

But I didn't get connected, anything wrong I am doing.

Posted 24-Aug-12 0:49am

mayankkarki

Updated 24-Aug-12 11:40am

Wendelius

v2

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Vinayak Hegde (Vinnie) · Answer 1 · 2014-04-30T06:34:00

Its bit late to give you my solution - but It would be useful for others if the encounter the same issue.

Possible solution would be as follows

C#

private string sDomain = "localhost:10389";
//sDomain is ServerName or Hosename or just IP address
//You had it with ldap://

private string sDefaultOU = "ou=users,ou=system";

private string sServiceUser = @"uid=admin,ou=system";
private string sServicePassword = "secret";

PrincipalContext oPrincipalContext = new PrincipalContext
   (ContextType.Domain, sDomain, sDefaultOU, sServiceUser, sServicePassword);

Hope this helps and it worked for me.

**Zoltán Zörgő** · Answer 2 · 2012-08-24T01:26:00

Solution 1

You are not passing the right parameters.
The five parameter constructor overload's third parameter is not default OU, it is default container! Thus you need to qualify it with DC-s. And the user name parameter need not be qualified with OU, use just the "admin" string.
Check also here: Using System.DirectoryServices.AccountManagement[^]

Posted 24-Aug-12 1:26am

Zoltán Zörgő

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mayankkarki 27-Aug-12 3:34am

Thanks for reply,
But I didn't get succeed.I tried to connect with michigan open ldap server

private string sDomain = "LDAP://ldap.itd.umich.edu:389";
private string sDefaultOU = "ou=System Groups,ou=Groups,dc=umich,dc=edu";
private string sServiceUser = "cn=Directory Manager,o=University of Michigan,c=us";
private string sServicePassword = "";

First I use this and works perfectly
DirectoryEntry de = new DirectoryEntry(sDomain + "/" + sDefaultOU, sServiceUser, sServicePassword,AuthenticationTypes.ServerBind);
DirectorySearcher ds = new DirectorySearcher(de);
SearchResult sr = ds.FindOne();

But with principalcontext got same error "server could not be contacted."
PrincipalContext oPrincipalContext = new PrincipalContext(ContextType.Domain, sDomain,sDefaultOU,ContextOptions.ServerBind|ContextOptions.Negotiate, sServiceUser, "");
Is there something missing?

Zoltán Zörgő 27-Aug-12 5:08am

For PrincipalContext, the sDomain should be only the dns name (no protocol, no port).