c# - Get all groups for a user using LDAP -


i've tried load groups user ldap.

currently i'm testing on our local ad. following code can load groups of given user:

public ienumerable<string> getusergroups( string username ) {      using ( var domaincontext = new principalcontext( contexttype.domain, name ) )     {         var user = userprincipal.findbyidentity( domaincontext, username );         return user.getauthorizationgroups().select( x => x.name} ).tolist();     } }

but fail same result using ldap.

code using ldap:

public ienumerable<string> getusergroups1(string username) {     //returns container name of given user     var containername = getusercontainername(username);      var groups = new list<string>();     if (containername == null)         return groups;      var entry = new directoryentry(string.format("ldap://{0}", "dc=example,dc=com"));      var searcher = new directorysearcher(entry)     {         filter = string.format("(member:{0}:=cn={1},{2},{3})",                                "1.2.840.113556.1.4.1941",                                containername, "cn=users", "dc=example,dc=com"),         searchscope = searchscope.subtree     };      var result = searcher.findall();     (var = 0; < result.count; i++)     {         var path = result[i].path;         var startindex = path.indexof("cn=", stringcomparison.ordinal) + 3;         groups.add(path.substring(startindex, path.indexof(",", startindex + 1,                    stringcomparison.ordinal) - startindex));      }      return groups; }

how can groups user using ldap?

my first advice should split method in sort of having better overview:

  1. get user.

you use that:

/// <summary> /// return user user name /// </summary> /// <param name="username_">username base search on</param> /// <returns> /// user manager or null if not found /// </returns> public static directoryentry searchforuser(string username_) {     directoryentry de = null;     directorysearcher directorysearcher = null;     domain domain = null;     try     {         if (string.isnullorempty(username_))             return null;          string username = username_.startswith("cn=") ? username_.replace("cn=", string.empty) : username_;          de = new directoryentry("ldap://" + domain.getcurrentdomain().name);         directorysearcher = new directorysearcher(de);         directorysearcher.filter = string.format("(&(objectclass=person)(objectcategory=user)(samaccountname={0}))", username);         searchresult searchresult = directorysearcher.findone();          return searchresult != null ? searchresult_.getdirectoryentry() : null;     }         {         if (de != null)             de.dispose();         if (directorysearcher != null)             directorysearcher.dispose();         if (domain != null)             domain.dispose();     } }

this way, can valid ldap path, domain name, domain

  1. get groups.

use second method , groups.

/// <summary> ///returns list groups user member of.  /// </summary> /// <remarks>the members in returned list instances of group.</remarks> /// <returns>groups user member of.</returns> public list<directoryentry> getgroups() {     return (from object o in entry.properties["memberof"]             select new directoryentry(path)             direntry             direntry.schemaclassname == "group"             select {directoryentry = direntry}).tolist(); }

where path ou path (root, or not).

the biggest challenge managing , building ldap path.

i hope helped.


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