User update details

CodeSnippets

//AccountViewModel
       // Return a pre-poulated instance of AppliationUser:
        public ApplicationUser GetUser()
        {
            var user = new ApplicationUser()
            {
                UserName = this.UserName,
                FirstName = this.FirstName,
                LastName = this.LastName,
                Email = this.Email,
            };
            return user;
        }

    }
    public class UpdateViewModel
    {
            public UpdateViewModel() { }

            // Allow Initialization with an instance of ApplicationUser:
            public UpdateViewModel(ApplicationUser user)
            {
                this.UserName = user.UserName;
                this.FirstName = user.FirstName;
                this.LastName = user.LastName;
                this.Email = user.Email;
            }

            [Display(Name = "User Name")]
            public string UserName { get; set; }

            [Required]
            [Display(Name = "First Name")]
            public string FirstName { get; set; }

            [Required]
            [Display(Name = "Last Name")]
            public string LastName { get; set; }

            [Display(Name = "Email address")]
            [Required(ErrorMessage = "The email address is required")]
            [EmailAddress(ErrorMessage = "Invalid Email Address")]
            public string Email { get; set; }
        }
}



//AccountController
//
// GET: /Account/Update
[AllowAnonymous]
public ActionResult UpdateUser(ManageMessageId? message = null)
  {
     var id = User.Identity.GetUserId();
     var Db = new ApplicationDbContext();
     var user = Db.Users.First(u => u.Id == id);
     var model = new UpdateViewModel(user);
     ViewBag.MessageId = message;
     return View(model);
  }

//
// POST: /Account/Update
[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public async Task<ActionResult> UpdateUser(UpdateViewModel model)
   {         
    if (ModelState.IsValid)
    {
       var _db = new ApplicationDbContext();
       var user = _db.Users.First(u => u.UserName == model.UserName);
       
       // Update the user data:
       
       user.FirstName = model.FirstName;
       user.LastName = model.LastName;
       user.Email = model.Email;
       _db.Entry(user).State = System.Data.Entity.EntityState.Modified;
       await _db.SaveChangesAsync();
       return RedirectToAction("Index", "Home");
     }
      // If we got this far, something failed, redisplay form
      return View(model);
   }