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New Message on BDOTNET
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From: Jayant_Magic
Message 2 in Discussion
Hi Sangeetha, To develop LDAP authentication code to look up the user in
Active Directory Add a new C# class file called LdapAuthentication.cs.
Add a reference to the System.DirectoryServices.dll assembly.
Add the following using statements to the top of LdapAuthentication.cs.
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using System.Text;
using System.Collections;
using System.DirectoryServices; Rename the existing namespace as FormsAuthAD.
Add two private strings to the LdapAuthentication class; one to hold the LDAP
path to Active Directory and the other to hold a filter attribute used for
searching Active Directory.
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private string _path;
private string _filterAttribute; Add a public constructor that can be used to
initialize the Active Directory path.
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public LdapAuthentication(string path)
{
_path = path;
} Add the following IsAuthenticated method that accepts a domain name, user
name and password as parameters and returns bool to indicate whether or not the
user with a matching password exists within Active Directory. The method
initially attempts to bind to Active Directory using the supplied credentials.
If this is successful, the method uses the DirectorySearcher managed class to
search for the specified user object. If located, the _path member is updated
to point to the user object and the _filterAttribute member is updated with the
common name attribute of the user object.
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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;
}
Also you can visit following link:
http://msdn2.microsoft.com/en-us/library/aa302397.aspx#secnetht02_step3
http://www.codeproject.com/dotnet/activedirusers.asp?df=100&forumid=127806&exp=0&select=1225851
Regards
Jayant Jindal
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