UserName from Active Directory

Question

User13622593 posted

I am trying to get the user name from active directory.  I used the code given but seem to get an error :Unknown error (0x80005000) on line
 using (SearchResultCollection src = ds.FindAll())

protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            string adPath = "ldap://oscar:389/OU=Atlanta,DC=datadist,DC=com";
            //use current login as search key
            string sFilter = String.Format(
                "(&(objectCategory=person)(sAMAccountName={0}))",
                HttpContext.Current.User.Identity.Name.Split(new char[] { '\\' })[1]
                 );
           
            //this is optional, but more efficient
            string[] attribs = new string[] { "cn", "sn", "givenName" };
            DirectoryEntry de = new DirectoryEntry(
                adPath,
                null,
                null,
                AuthenticationTypes.Secure
                );

            using (de)
            {
                DirectorySearcher ds = new DirectorySearcher(
                    de,
                    sFilter,
                    attribs, //set this to null to retrieve all attribs
                    SearchScope.Subtree
                    );

                SearchResult sr = null;

                using (SearchResultCollection src = ds.FindAll())
                {
                    if (src.Count > 0)
                        sr = src[0];
                }

                if (sr == null)
                {
                    Label1.Text = "User not found...";
                    return;
                }

                StringBuilder sb = new StringBuilder();

                //dump everything we have
                foreach (string key in sr.Properties.PropertyNames)
                {
                    if (sr.Properties.Contains(key))
                    {
                        foreach (object o in sr.Properties[key])
                        {
                            //output every item
                            sb.AppendFormat("{0} : {1}<br>", key, o);
                        }
                    }
                }

                Label1.Text = "Hello " + sb.ToString();
            }
        }

    }

Answer 1

User-508806111 posted

Here is a sample code with comments to retrieve appropriate fields:

 

        Dim oroot As DirectoryEntry = New DirectoryEntry("LDAP://YOURACTIVEDIRECTORY", "USERNAME-ADMIN, "PASSWORD")
        Dim osearcher As DirectorySearcher = New DirectorySearcher(oroot)
        Dim oresult As SearchResultCollection
        Dim result As SearchResult

        osearcher.Filter = "(&(objectCategory=person))" ' search filter
        osearcher.PropertiesToLoad.Add("cn") ' username
        osearcher.PropertiesToLoad.Add("name") ' full name
        osearcher.PropertiesToLoad.Add("givenname") ' firstname
        osearcher.PropertiesToLoad.Add("sn") ' lastname
        osearcher.PropertiesToLoad.Add("mail") ' mail
        osearcher.PropertiesToLoad.Add("initials") ' initials
        osearcher.PropertiesToLoad.Add("ou") ' organizational unit
        osearcher.PropertiesToLoad.Add("userPrincipalName") ' login name
        osearcher.PropertiesToLoad.Add("distinguishedName") ' distinguised name
        oresult = osearcher.FindAll()

        For Each result In oresult
            If Not result.GetDirectoryEntry.Properties("sn").Value Is Nothing Then
                ' writes specific values retrieved from above - this is just a sample.
                response.write(result.GetDirectoryEntry.Properties("cn").Value & ":" & result.GetDirectoryEntry.Properties("userPrincipalName").Value)
            End If
        Next

 hope this helps.

Jae.

Answer 2

User13622593 posted
Jae I need it in C#

Answer 3

User-496071636 posted

I am trying to get the user name from active directory.  I used the code given but seem to get an error :Unknown error (0x80005000) on line
 using (SearchResultCollection src = ds.FindAll())

protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            string adPath = "<STRIKE>ldap</STRIKE>://oscar:389/OU=Atlanta,DC=datadist,DC=com";
            //use current login as search key
            string sFilter = String.Format(

Firstly, thanks for your code, it really helped with my own Active Directory using.

I just wanted to say that if you notice the strikethrough I put in your quote above, it was causin the exact same error when I used it. But after changing that to LDAP instead of ldap, it moved past that message.

Also I noticed the weirdest functionality, if I had Authentication=Windows and Impersonate=True (both in web.config), it would give me a different error message. However with Auth=Win and Impersonate=False, it worked perfectly. I suppose that the Network Service on my web server has rights to use the AD server, whereas using my credentials really didn't work.

Hope it helps,

J

Answer 4

User1674234528 posted

Try this. I have used an online converter to change it from VB.NET to C# but it should be ok.
 

public void getUser()
{
 DirectoryServices.SearchResult myResult;
 string filterString = string.Empty;
 string EntryString = "LDAP:// <Your AD Domain here>";
 DirectoryServices.DirectorySearcher myDirectorySearcher = new DirectoryServices.DirectorySearcher(new DirectoryServices.DirectoryEntry(EntryString, "Username", "Password"));
 string tempStr;
 string[] splStr = new string[3];
 try {
   filterString = "(sAMAccountName=" + Username + ")";
   myDirectorySearcher.Filter = filterString;
   myDirectorySearcher.PropertiesToLoad.Add("cn");
   myResult = myDirectorySearcher.FindOne();
   splStr = Regex.Split(myResult.Properties("cn").Item(0).ToString, " ");
   tempStr = splStr(1).ToString + " " + splStr(0).ToString;
   Label1.Text = "Hello " + tempStr;
 } catch (Exception ex) {
 }
}

Answer 5

User590000598 posted

Hi, Can you translate it in vb.net? thanks [;)]

Answer 6

User590000598 posted

 Hi, Guys! Can somebody help me?

I am currently developing a web application where in I have user management, allows adding AD user or non-AD user. If Active Direcory (AD) user, I will not ask for password at all, I just need to check if the user exist in active directory. During log-in, that's the time the user will be asked for authentication info, e.i. Username and password, then authenticate against active directory.

My problem is How can I validate user (not authenticate, but just check existence) using LDAP? or How can I verify whether an account exists in an Active Directory? and without providing any password at all. in vb.net plss...

Thanks in advance! [;)]

Answer 7

User1191518856 posted

You can use a DirectorySearcher to check if a user exists in the AD. Only problem is that the DirectorySearcher needs to authenticate before beginning searching. And AD does not allow anonymous access, so to do a search routine like this you would need to create a service account in your AD that this code can use. Once you have done this, it's a piece of cake to get the searching done.

Here's a page that should get you started: Active Directory and VB.NET 

Most AD examples are pretty straight forward to translate between VB and C# too. Or you could make use of an online converter such as http://www.dotnetspider.com/convert/CSharp-To-Vb.aspx