Get user's full name from active directory in asp.net web application

I am trying to get the full name of a given user from active directory. This code works on my PC but when I put it on the server it throws exception:

The network path was not found.

The code is:

DirectoryEntry obDirEntry = null;
        try
        {
            obDirEntry = new DirectoryEntry("WinNT://" + "domain" + "/" + Environment.UserName);
            System.DirectoryServices.PropertyCollection coll = obDirEntry.Properties;
            object obVal = coll["FullName开发者_如何学JAVA"].Value;
            Response.Write(obVal);
        }
        catch (Exception ex)

        {
           Response.Write(ex.Message);
        }

Any idea how to fix so it would work on the server also? Or maybe some other way I can get the full name of a given user name? Do I need to use LDAP instead somehow?

There can be many issues here is what I found out

1. Your new Directory object is pointing to WINNT I guess you need to use LDAP address for this one i.e.

   new DirectoryEntry("LDAP://" + sADServer + "/" + sNewOUPath, sADUser, sADPassword, AuthenticationTypes.Secure);

2. In your webserver you need to change the user in your App Pool, and that user should have the proper rights to AD

3. You can also edit your web.config to do <identity impersonate="true" /> and mage sure that the one that runs the page on the web server has the proper permission to AD

for a full implementation referenc of AD refer to this one http://anyrest.wordpress.com/2010/02/01/active-directory-objects-and-c/

I just faced with this problem too, and I found another solution. In my case I just added ".local" postfix after domain name. I.e. I've done something like this:

DirEntry = new DirectoryEntry("WinNT://" + "domain.local" + "/" + Environment.UserName);

BR, Vladimir