Get Name of User from Active Directory

I need to show only the name of a user from Active Directory, I am using

 lbl_Login.Text = User.Identity.Name; //the result is domainusername

This shows the users name but not the real name of the user, I’ve checked other questions and answers related here but I’ve not gotten the solution.

Is there any property just as “User.Identity.Name” to get only the name of the user?

Answers:

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Method 1

You want name of a user from active directory. Try code like this:

string name ="";
using (var context = new PrincipalContext(ContextType.Domain))
{
    var usr = UserPrincipal.FindByIdentity(context, User.Identity.Name); 
    if (usr != null)
       name = usr.DisplayName;  
}

or this from social.msdn.microsoft.com:

PrincipalContext ctx = new PrincipalContext(ContextType.Domain);
UserPrincipal user = UserPrincipal.Current;
string displayName = user.DisplayName;

or may be it:

System.DirectoryServices.AccountManagement.UserPrincipal.Current.DisplayName;

The System.DirectoryServices.AccountManagement namespace provides uniform access and manipulation of user, computer, and group security principals across the multiple principal stores: Active Directory Domain Services (AD DS), Active Directory Lightweight Directory Services (AD LDS), and Machine SAM (MSAM).

Method 2

using System.DirectoryServices.AccountManagement;

string fullName = null;
using (PrincipalContext context = new PrincipalContext(ContextType.Domain))
{
    using (UserPrincipal user = UserPrincipal.FindByIdentity(context, User.Identity.Name))
    {
        if (user != null)
        {
            fullName = user.DisplayName;
            lbl_Login.Text = fullName;
        }
    }
}

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0