How to Edit and Save ViewModels data back to database

Question

I have a ViewModel which is joined by three Entities to get data from all entities into one view form. Although i succeeded to implement the same. But i have no idea how to Edit

Answer 1

Here, for creating:

[HttpPost]
public ActionResult Create(DoctorViewModel model)
{
    if (ModelState.IsValid)
    {
        model.Doctor.DoctorAddress = model.DoctorAddress;
        model.Doctor.DoctorCharge = model.DoctorCharge;
        db.Doctors.Add(doctor);
        db.SaveChanges();
        return RedirectToAction("Index");
    }

    return View(doctor);
}