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Active Directory Login failed when using C#

Posted on 2009-04-08
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Last Modified: 2013-12-24
Hell experts!
I'm facing a weird problem when connection to AD using C#.
When I run the C# project, it fails and gives me an error saying that the user or password may be invalid.
I converted the code to VB.Net and it works perfectly.
The problem is ocurring when I call the FindOne method.
What could be causing this problem?
I've attached both c# and vb.net code to this message.

Please, help.
C# code:
 
            this.AD = new DirectoryEntry(loginPath, loginUsername, loginPassword);
            var filter = "(&(objectCategory=Person) (sAMAccountName=" + username + "))";
            var diretorySearcher = new DirectorySearcher(this.AD);
            SearchResult searchResult = null;
            diretorySearcher.SearchRoot = this.AD;
            diretorySearcher.SearchScope = SearchScope.Subtree;
            diretorySearcher.Filter = filter;
            searchResult = diretorySearcher.FindOne();
            DirectoryEntry user = searchResult.GetDirectoryEntry();
 
VB.Net code:
            Me.AD = New DirectoryEntry(loginPath, loginUsername, loginPassword)
            String filter = "(&(objectCategory=Person) (sAMAccountName=" & username & "))"
            DirectorySearcher diretorySearcher = New DirectorySearcher(Me.AD)
            SearchResult searchResult = Nothing
            diretorySearcher.SearchRoot = Me.AD
            diretorySearcher.SearchScope = SearchScope.Subtree
            diretorySearcher.Filter = filter
            searchResult = diretorySearcher.FindOne()
            DirectoryEntry user = searchResult.GetDirectoryEntry()

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Question by:andrepires
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Expert Comment

by:Gautham Janardhan
ID: 24104297
after the first line try this
object Native = this.AD.NativeObject;

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by:andrepires
ID: 24106630
Ok, but what should I do with that Native object?
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Expert Comment

by:Gautham Janardhan
ID: 24106757
nothing, that line basically tries to validate the entry against AD and makes connection with AD
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Author Comment

by:andrepires
ID: 24106998
Ok... I'll try that and let you know.
Thanks.
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Accepted Solution

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andrepires earned 0 total points
ID: 24208177
Hello.
The solution did not work.
I was forced to compile an assembly created with VB.Net and consume it in my application.
Thanks for helping!
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