类之间的关系订单退货

我已经创建了订单类，您可以制作订单并查看订单。然而，现在我正在尝试创建一个"退货"页面，基本上允许用户输入退货原因，然后打印原因/发票。我有订单创建表单，但我不知道如何链接2来表示此退货属于此订单我所能做的就是创建一个不链接任何内容的通用退货。我已经建立了关系，我只是不确定如何将退货与特定订单联系起来。我知道这是一个基本的问题，我只是在网上找不到任何帮助我的东西。我是一名学生，一个解释将是非常有益的，因为我需要在其他方面使用类似的方法

这是我的控制器，用于查看MyOrders和ReturnsForm

namespace T_shirt_Company_v3.Controllers
{
    public class MyOrderController : Controller
    {
        TshirtStoreDB db = new TshirtStoreDB();

        /// <summary>
        /// Returns a list of Orders made by the user
        /// </summary>
        /// <param name="date">choose date period viewing orders</param>
        /// <param name="order">Orders being viewed</param>
        /// <returns></returns>
        [Authorize]
        public ActionResult Index(string date, Order order)
        {
            TshirtStoreDB db = new TshirtStoreDB();
            string currentUser = this.User.Identity.GetUserName();
            List<T_shirt_Company_v3.ViewModels.MyOrdersViewModel> list = (from o in new TshirtStoreDB().Orders
                    .Where(o => o.Username == currentUser)
                    .OrderByDescending(o => o.OrderDate)
                    .Select(o => new MyOrdersViewModel()
                    {
                        OrderId = o.OrderId,
                        Address = o.Address,
                        FirstName = o.FirstName,
                        LastName = o.LastName,
                        City = o.City,
                        OrderDate = o.OrderDate,
                        PostalCode = o.PostalCode,
                        Total = o.Total,
                        HasBeenShipped = o.HasBeenShipped,
                        PostageList = o.PostageList,
                        Details = (from d in o.OrderDetails
                                   select new MyOrderDetails
                                   {
                                       Colour = d.Product.Colour,
                                       Quantity = d.Quantity,
                                       Title = d.Product.Title,
                                       UnitPrice = d.UnitPrice
                                   }).ToList()
                    }).ToList() select o).ToList();

                if (date != null)
                {
                DateTime today = DateTime.Now.AddDays(Convert.ToInt32(date) * -1);
                return View(list.Where(x => x.OrderDate >= today).ToList());
                }

            return View(list);
        }
        public ActionResult ReturnsForm()
        {
            return View();
        }
        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult ReturnsForm([Bind(Include = "ReturnId,OrderId,ReturnDate,Reason")] returnDetails returnDetails)
        {
            if (ModelState.IsValid)
            {
                if (returnDetails != null)
                {
                    returnDetails.ReturnDate = DateTime.Now;
                }
                db.returnDetails.Add(returnDetails);
                db.SaveChanges();
                return RedirectToAction("Index");
            }
            return View(returnDetails);
        }
    }
}

和我的MyOrders视图

@model List<T_shirt_Company_v3.ViewModels.MyOrdersViewModel>

@{
    ViewBag.Title = "My Orders";
}
<style>
    table, th, td {
        border: 0px solid black;
        border-collapse: collapse;
        margin-bottom:50px;
        padding-bottom:50px;
    }
    th, td {
        padding: 5px;
        border-spacing: 10px;
        text-align: center;
    }   
</style>
<center>
    <h1>My Orders</h1>
    <br />
    @using (Html.BeginForm("Index", "MyOrder", FormMethod.Get))
    {
        <text>Orders Made </text><select id="date" name="date">
            <option value="9999">All Orders</option>
            <option value="1">In the last day</option>
            <option value="7">In the last week</option>
            <option value="30">In the last month</option>
            <option value="365">In the last year</option>
        </select>
        <input type="submit" name="submit" value="Search" />
    }
    <table>
        @foreach (var m in Model)
        {
            <tr>
                @*<td style="background-color: #ffffe0"><b>Order Status</b> <br />@ViewBag.ShippedMessage</td>*@
                <td style="background-color: #ffffe0"><b>Order Status</b> <br />@(m.HasBeenShipped ? "Order has been shipped" : "Order is being processed") <br /> @ViewBag.PostageStatus</td> 
                <td style="background-color: #ffffe0"><b>Order Placed</b> <br />@m.OrderDate <br /> @m.PostageList</td>
                <td style="background-color: #ffffe0"><b>Dispatched to</b> <br />@m.FirstName @m.LastName</td>
                <td style="background-color: #ffffe0"><b>Delivery Address</b><br /> @m.Address <br /> @m.City <br /> @m.PostalCode <br /> </td>
                <td style="background-color: #ffffe0"><b>Total Cost</b><br /> £@m.Total</td>
                <td style="background-color: #ffffe0"><b>Order Number</b><br /> @m.OrderId</td>
            </tr>
            foreach (var d in m.Details)
            {
                <tr>
                    <td colspan="3" style="text-align: left; background-color:#ADD8E6;"><b>Product Name</b> @d.Title <br /><b>Colour</b> @d.Colour</td>
                    <td style="background-color: #ADD8E6"><b>Price: </b> £@d.UnitPrice</td>
                    <td colspan="2" style="background-color: #ADD8E6"><b>Quantity Ordered: </b> @d.Quantity</td>
                </tr>

            }
            <tr><td>@Html.ActionLink("Return Order", "ReturnsForm")</td></tr>
            <tr><td></td></tr>
            <tr><td></td></tr>
            <tr><td></td></tr>
        }

    </table>
</center>

我的退货创建查看

@model T_shirt_Company_v3.Models.returnDetails
@{
    ViewBag.Title = "ReturnsForm";
}
<h2>ReturnsForm</h2>
@using (Html.BeginForm()) 
{
    @Html.AntiForgeryToken()
    <div class="form-horizontal">
        <h4>returnDetails</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group">
            @Html.LabelFor(model => model.Reason, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Reason, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Reason, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
}
<div>
    @Html.ActionLink("Back to List", "Index")
</div>

类别

namespace T_shirt_Company_v3.Models
{
    //[Bind(Exclude = "OrderId")]
    public partial class Order
    {
        [ScaffoldColumn(false)]
        public int OrderId { get; set; }
        [ScaffoldColumn(false)]
        public System.DateTime OrderDate { get; set; }
        [ScaffoldColumn(false)]
        [Remote("CheckUserName", "Account")]
        public string Username { get; set; }
        [Required]
        [StringLength(16, ErrorMessage = "Your name is too long")]
        [Display(Name = "First Name")]
        public string FirstName { get; set; }
        [Required(ErrorMessage = "Your last name is required.")]
        [StringLength(16, ErrorMessage = "Last name is too long.")]
        [Display(Name = "Last Name")]
        public string LastName { get; set; }
        [Required(ErrorMessage = "Address is required.")]
        public string Address { get; set; }
        [Required(ErrorMessage = "City is required.")]
        public string City { get; set; }
        [Required(ErrorMessage = "Postcode is required.")]
        [Display(Name = "Post Code")]
        public string PostalCode { get; set; }
        [Required(ErrorMessage = "Country is required.")]
        public string Country { get; set; }
        [Required(ErrorMessage = "Phone number is required.")]
        public string Phone { get; set; }
        [RegularExpression(@"[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+'.[A-Za-z]{2,4}", ErrorMessage = "Email doesn't look like a valid email address.")]
        public string Email { get; set; }
        [System.ComponentModel.DataAnnotations.Compare("Email")]
        [Display(Name = "Confirm your email address")]
        public string EmailConfirm { get; set; }

        [ScaffoldColumn(false)]
        public string PaymentTransactionId { get; set; }

        [ScaffoldColumn(false)]
        public bool HasBeenShipped { get; set; }
        [ScaffoldColumn(false)]
        //[ReadOnly(true)]
        public decimal Total { get; set; }
        [Required]
        [Range(0, 2, ErrorMessage = "Select a delivery method")]
        public Postage? PostageList { get; set; }
        public CardDetails cardDetails { get; set; }
        //public List<CardDetails> cardDetails { get; set; }
        public List<OrderDetail> OrderDetails { get; set; }
        public int ReturnId { get; set; }
        public virtual returnDetails returns { get; set; }
    }
    public enum Postage {[Display(Name = "Standard Delivery - Free")]StandardDelivery, [Display(Name = "First Class Delivery - £5")]FirstClass, [Display(Name = "24 Hour Delivery - £10")]TwentyFourHour }
    public class returnDetails
    {
        [Key]
        public int ReturnId { get; set; }
        [ScaffoldColumn(false)]
        public System.DateTime ReturnDate { get; set; }
        [Required]
        public string Reason { get; set; }
        [ForeignKey("Order")]
        public int OrderId { get; set; }
        public virtual Order order { get; set; }
    }
}

按键在返回类中

[ForeignKey("Order")]
public int OrderId { get; set; }
public virtual Order order { get; set; }

在订单类别中

public int ReturnId { get; set; }
public virtual returnDetails returns { get; set; }

@foreach (var m in Model)
{
    ....
    @Html.ActionLink("Return Order", "ReturnsForm", new { orderID = m.OrderId })
}

public ActionResult ReturnsForm(int orderID)
{
    returnDetails model = new returnDetails()
    {
        OrderId  = orderID
    };
    return View(model );
}

@Html.HiddenFor(m => m.OrderId )