MVC5：将子实体传递给Create（post方法）

Question

我创建了一个应用程序来引导用户完成一些数据收集过程。他有一个实体＆＃39;客户＆＃39;，在不同的视图中添加不同的数据集。

最后，我想向他展示一个概述，他也可以添加评论。注释作为由外键连接的子实体保存在另一个表中。 有没有办法从这种形式的viewmodel创建一个子实体？

这是我的父实体客户。

public class Customer
    {
        [Key]
        public int Code { get; set; }

        [Required]
        [Display(Name = "FamilyName", ResourceType = typeof(TextResourceFile))]
        public string FamilyName { get; set; }
        [Required]
        [Display(Name = "Name", ResourceType = typeof(TextResourceFile))]
        public string Name{ get; set; }

        [Display(Name = "PostalCode", ResourceType = typeof(TextResourceFile))]
        public string PostalCode { get; set; }

        [Display(Name = "City", ResourceType = typeof(TextResourceFile))]
        public string City { get; set; }

        [Display(Name = "StreetAndNumber", ResourceType = typeof(TextResourceFile))]
        public string StreetAndNumber { get; set; }

        [DataType(DataType.Date)]
        [Display(Name = "BirthDate", ResourceType = typeof(TextResourceFile))]
        [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:yyyy-MM-dd}")]
        public DateTime? BirthDate { get; set; }

        [DataType(DataType.Date)]
        [Display(Name = "CreationDate", ResourceType = typeof(TextResourceFile))]
        [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:yyyy-MM-dd}")]
        public DateTime? CreationDate { get; set; }

        [DataType(DataType.Date)]
        [Display(Name = "ModificationDate", ResourceType = typeof(TextResourceFile))]
        [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:yyyy-MM-dd}")]
        public DateTime ModificationDate { get; set; }

        public virtual ICollection<CustomerNote> CustomerNotes { get; set; }
        public virtual ICollection<somethingElse> somethingElse{ get; set; }
        public virtual ICollection<somethingElse> somethingElse{ get; set; }
        public virtual ICollection<somethingElse> somethingElse{ get; set; }
        public virtual ICollection<somethingElse> somethingElse{ get; set; }
        public virtual ICollection<somethingElse> somethingElse{ get; set; }
        public virtual ICollection<somethingElse> somethingElse{ get; set; }
    }

这是我的孩子CustomerNote

public class CustomerNote
{
    [Key]
    public int Code { get; set; }
    public int CustomerCode { get; set; }
    [Display(Name = "Anamnesis", ResourceType = typeof(TextResourceFile))]
    public string Anamnesis { get; set; }
    public DateTime CreationDate { get; set; }
    public DateTime ModificationDate { get; set; }
}

这是我最初的Create（）Methode，其中包含所有必要的数据：

    public ActionResult Create(int? code)
    {
        if (code == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }
        var customer = db.Customer.FirstOrDefault(cu => cu.Code == code);
        if (customer == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }

        ViewBag.Customercode = customer.Code;

        var customNote = new CustomerNote();

        customNote.CustomerCode = customer.Code;
        customNote.Anamnesis = string.Empty;
        customer.CustomerNotes.Add(customNote);

        return View(customer);
    }

这是我的Post方法，我想保存评论：

    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create(/*[Bind(Include = "CustomerNote")] */Customer customer)
    {
        if (customer != null && customer.CustomerNotes != null)
        {
            var customerNote = new CustomerNote();

            customerNote.CreationDate = DateTime.Now;
            customerNote.ModificationDate = DateTime.Now;
            customerNote.CustomerCode = customer.Code;
            customerNote.Anamnesis = customer.CustomerNotes.OrderByDescending(x => x.CreationDate).FirstOrDefault().Anamnesis;

            db.CustomerNote.Add(customerNote);
            db.SaveChanges();

            return RedirectToAction("Index", "Home");
        }
        return View(customer);
    }

在我看来，我显示的数据如下，但当然不起作用。我该如何改变呢？

<br />
<h3>@Html.LabelFor(model => model.CustomerNotes.OrderByDescending(x => x.CreationDate).FirstOrDefault().Anamnesis)</h3>
<div>
    @Html.TextBoxFor(model => model.CustomerNotes.OrderByDescending(x => x.CreationDate).FirstOrDefault(), new {htmlAttributes = new {@class = "form-control"}})
    @Html.ValidationMessageFor(model => model.CustomerNotes.OrderByDescending(x => x.CreationDate).FirstOrDefault().Anamnesis, "", new {@class = "text-danger"})
</div>

我现在添加了一个viewmodel：

public class CustomerNoteIndexData
{
    public int CustomerCode { get; set; }
    public CustomerNote CustomerNote { get; set; }
    public Customer Customer { get; set; }
    public otherInformationLists otherInformationLists { get; set; }
    public otherInformationLists otherInformationLists { get; set; }
    public otherInformationLists otherInformationLists { get; set; }
    public otherInformationLists otherInformationLists { get; set; }
    public otherInformationLists otherInformationLists { get; set; }
    public otherInformationLists otherInformationLists { get; set; }

}

他们不是列表，但显示每个实体的最新条目。

现在不知何故，CustomerCode保持空白。