ASP.Net MVC - 带集合的模型，提交

>我有一个看起来像

public class Patient
{
    private ICollection<Refill> _refills = new List<Refill>();
    public int Id { get; set; }
    public string FirstName { get; set; }
                  
    public virtual ICollection<Refill> Refills
    {
        get { return _refills; }
        set { _refills = value; }
    }
}
public class Refill
{
    public int Id { get; set; }
    public RefillActivityStatus RefillActivityStatus { get; set; }
    public DateTime? RefillDate { get; set; }
    public RefillType RefillType { get; set; }
    public string RXNumber { get; set; }
}

这就是我要做的。我想在视图中填充这些内容，并在用户单击保存更改时填充这些内容。我希望保存实体框架。我遇到的问题是在我这样做的视图中

@foreach (var m in Model.Refills)
{
     @Html.HiddenFor(model=>m.Id)
     <div class="editor-label">
         @Html.LabelFor(model => m.RXNumber)
     </div>
     <div class="editor-field">
         @Html.EditorFor(model => m.RXNumber)                                  
     </div>     
}

我正在尝试在控制器中做这样的事情

[HttpPost]
public ActionResult Details(Patient patient)
{
    Patient p = db.Patients.Find(patient.Id);
    db.Entry(p).State = EntityState.Modified;
    db.Entry(p).CurrentValues.SetValues(patient);
    // Would include Refill changes too but it doesn't
    db.SaveChanges();
    return View(p);
}

但是，Refills不会在HttpPost上传播。它只是空的，我需要做什么来修复它？

@for (int i = 0; i < Model.Refills.Count(); i++)
{
    @Html.Hidden("Refills[" + i + "].Id", Model.Refills[i].Id)
    <div class="editor-label">
        @Html.Label("Refills[" + i + "].RXNumber", Model.Refills[i].RXNumber)
    </div>
    <div class="editor-field">
        @Html.Editor("Refills[" + i + "].RXNumber")
    </div>     
}