How to authenticate users from active directory in ASP.NET MVC(.NET framework)

See more:

forms

ASP.NET4

Identity

, +

Hi Team

I need some help, current issue my web form username is null. I think what i want to achieve, we are using our own domain server. My approach want this web app to be able to authenticate me as a user and be redirected to dashboard. For now i am acting as an Administrator. The application is not doing this and im trying to get an idea, as to why my username is null but redirected back to Login

What I have tried:

<system.web>
  <compilation debug="true" targetFramework="4.7.2"/>
  <httpRuntime targetFramework="4.7.2"/>
    <sessionState mode="InProc" />
</system.web>
<runtime>

<pre><appSettings>
    <add key="webpages:Version" value="3.0.0.0"/>
    <add key="webpages:Enabled" value="false"/>
    <add key="ClientValidationEnabled" value="true"/>
    <add key="UnobtrusiveJavaScriptEnabled" value="true"/>
    <!---Adding some active directory here for configuration- -->
    <add key="DomainName" value="ROCKLANDS"/>
    <add key="DomainController" value="LDAP://ROCKLANDS"/>
	  
  </appSettings>

//controller

<pre> [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Login(LoginModel login)
        {
            if (ModelState.IsValid)
            {
                // validate credentials via AD Account
                bool isAuthenticated = ValidateCredentials(login.UserName, login.Password);

                if (isAuthenticated)
                {
                    // Set the "Username" session variable
                    Session["Username"] = login.UserName;

                    // return successful, redirect to the dashboard.
                    TempData["SuccessMessage"] = "Login successful!";
                    return RedirectToAction("Dashboard", "Account");
                }
                else
                {
                    ModelState.AddModelError("", "Invalid username or password");
                }
            }
            return View(login);
        }


        // validate user account from AD(Active Directory) .
        private bool ValidateCredentials(string password, string username)
        {
            // validate credentials against AD Account.
            using(PrincipalContext pc = new PrincipalContext(ContextType.Domain))
            {
                return pc.ValidateCredentials(username, password);
            }
        }

        //GET: GetLoggedInUser.
       
        public JsonResult GetLoggedInUser()
        {
            // fetch the logged in user's username.
            string username = User.Identity.Name;
            return Json(new { Username = username }, JsonRequestBehavior.AllowGet);
        }

        // dashboard for the account: Performed by HR Manager and Administrators


        public ActionResult Dashboard()
        {
            // retrieve user information from the session.
            var username = Session["Username"] as string;
            if (string.IsNullOrEmpty(username))
            {
                // Redirect to login if username is null or empty
                return RedirectToAction("Login", "Account");
            }

            // Proceed with dashboard logic
            var imageUrl = GetImageUrl(username);
            var userModel = new UserModel { UserName = username, ImageUrl = imageUrl };
            return View(userModel);
        }



        private string GetImageUrl(string username)
        {
            // connect to Active Directory and fetch user's image.
            using (var principalContext = new PrincipalContext(ContextType.Domain))
            {
                using (var user = UserPrincipal.FindByIdentity(principalContext, username))
                {
                    if (user != null)
                    {
                        // check if the user has a thumbnail photo.
                        if (user.GetUnderlyingObject() is DirectoryEntry directoryEntry && directoryEntry.Properties.Contains("thumbnailPhoto"))
                        {
                            byte[] thumnailBytes = directoryEntry.Properties["thumbnailPhoto"].Value as byte[];
                            if (thumnailBytes != null && thumnailBytes.Length > 0)
                            {
                                // convert the byte array to base64 string
                                string base64String = Convert.ToBase64String(thumnailBytes);
                                return "data:image/jpeg;base64," + base64String;
                            }
                        }
                    }
                }
            }
            return "http://intranet.rocklands.co.za/default-user-image.png";
        }

       
    }