get a list of online users in asp.net mvc

Question

I have a page in my application which always shows updated list of online users. Now, to keep the list-which is stored in application object- updated, i do the below steps

Answer 1

In your Account Controller

   public ActionResult Login(LoginModel model, string returnUrl)
    {
        if (ModelState.IsValid)
        {
            if (Membership.ValidateUser(model.UserName, model.Password))
            {
                FormsAuthentication.SetAuthCookie(model.UserName, model.RememberMe);
                if (HttpRuntime.Cache["LoggedInUsers"] != null) //if the list exists, add this user to it
                {
                    //get the list of logged in users from the cache
                    List loggedInUsers = (List)HttpRuntime.Cache["LoggedInUsers"];
                    //add this user to the list
                    loggedInUsers.Add(model.UserName);
                    //add the list back into the cache
                    HttpRuntime.Cache["LoggedInUsers"] = loggedInUsers;
                }
                else //the list does not exist so create it
                {
                    //create a new list
                    List loggedInUsers = new List();
                    //add this user to the list
                    loggedInUsers.Add(model.UserName);
                    //add the list into the cache
                    HttpRuntime.Cache["LoggedInUsers"] = loggedInUsers;
                }
                if (!String.IsNullOrEmpty(returnUrl))
                {
                    return Redirect(returnUrl);
                }
                else
                {

                    return RedirectToAction("Index", "Home");
                }
            }
            else
            {
                ModelState.AddModelError("", "The user name or password provided is incorrect.");
            }
        }

        // If we got this far, something failed, redisplay form
        return View(model);
    }


    public ActionResult LogOff()
    {
        string username = User.Identity.Name; //get the users username who is logged in
        if (HttpRuntime.Cache["LoggedInUsers"] != null)//check if the list has been created
        {
            //the list is not null so we retrieve it from the cache
            List loggedInUsers = (List)HttpRuntime.Cache["LoggedInUsers"];
            if (loggedInUsers.Contains(username))//if the user is in the list
            {
                //then remove them
                loggedInUsers.Remove(username);
            }
            // else do nothing
        }
        //else do nothing
        FormsAuthentication.SignOut();
        return RedirectToAction("Index", "Home");
    }

in your partial view.

@if (HttpRuntime.Cache["LoggedInUsers"] != null)
{
    List LoggedOnUsers = (List)HttpRuntime.Cache["LoggedInUsers"];
    if (LoggedOnUsers.Count > 0)
    {
    

        

            @foreach (string user in LoggedOnUsers)
            {
                

                    

                       
@Html.Encode(user)
                    
                
            }
        
    
    }
}

render this partial view when user log in.

use this script call ever 90 second