C#代码登录活动目录

代码

using  System;
using  System.Collections.Generic;
using  System.Text;
using  System.DirectoryServices;

namespace  ChangeControlApp
{
     class  LdapAuthentication
    {
         private  String _path;
         private  String _filterAttribute;

         public  LdapAuthentication(String path)
        {
            _path  =  path;
        }

         public   bool  IsAuthenticated(String domain, String username, String pwd)
        {
            String domainAndUsername  =  domain  +   @" \ "   +  username;
            DirectoryEntry entry  =   new  DirectoryEntry(_path, domainAndUsername, pwd);

             try
            {     // Bind to the native AdsObject to force authentication.            
                Object obj  =  entry.NativeObject;

                DirectorySearcher search  =   new  DirectorySearcher(entry);

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

                 if  ( null   ==  result)
                {
                     return   false ;
                }

                 // Update the new path to the user in the directory.
                _path  =  result.Path;
                _filterAttribute  =  (String)result.Properties[ " cn " ][ 0 ];
            }
             catch  (Exception ex)
            {
                 throw   new  Exception( " Error authenticating user.  "   +  ex.Message);
            }

             return   true ;
        }

         public  String GetGroups()
        {
            DirectorySearcher search  =   new  DirectorySearcher(_path);
            search.Filter  =   " (cn= "   +  _filterAttribute  +   " ) " ;
            search.PropertiesToLoad.Add( " memberOf " );
            StringBuilder groupNames  =   new  StringBuilder();

             try
            {
                SearchResult result  =  search.FindOne();

                 int  propertyCount  =  result.Properties[ " memberOf " ].Count;

                String dn;
                 int  equalsIndex, commaIndex;

                 for  ( int  propertyCounter  =   0 ; propertyCounter  <  propertyCount; propertyCounter ++ )
                {
                    dn  =  (String)result.Properties[ " memberOf " ][propertyCounter];

                    equalsIndex  =  dn.IndexOf( " = " ,  1 );
                    commaIndex  =  dn.IndexOf( " , " ,  1 );
                     if  ( - 1   ==  equalsIndex)
                    {
                         return   null ;
                    }

                    groupNames.Append(dn.Substring((equalsIndex  +   1 ), (commaIndex  -  equalsIndex)  -   1 ));
                    groupNames.Append( " | " );

                }
            }
             catch  (Exception ex)
            {
                 throw   new  Exception( " Error obtaining group names.  "   +  ex.Message);
            }
             return  groupNames.ToString();
        }

    }
}

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