Field is updating with NULL value even though it is excluded from Propery Binding

Question

I have a Model as follows:

public class ApplicationUser
{
    public Int64 Id { get; set; }
    public string FullName { get; set; }
    public string Email { get; set; }
    public string Password { get; set; }
}

And my Controller has Actions to Edit the Model as follows:

    public ActionResult MyProfile(int id)
    {
        var currentUser = _context.ApplicationUsers.Find(applicationuser.Id);
        return View(currentUser);
    }

    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult MyProfile([Bind(Exclude="Password")]ApplicationUser applicationuser)
    {
        if (ModelState.IsValid)
        {
            _context.Entry(applicationuser).State = EntityState.Modified;
            _context.SaveChanges();
            return RedirectToAction("Index");
        }
        return View(applicationuser);
    }

Here, POST method is updating the FullName and Email fields properly. But, It's updating NULL value to Password field. How to avoid this?

Answer 1

Here bind attribute'll not help you out put this line before savechanges()

db.Entry(model).Property(x => x.Password).IsModified = false