javascript - 在 View 之间传递值 MVC5

Question

我正在创建一个事件管理系统，我想创建一个事件，然后为此事件创建多个门票。我正在使用 C# 和 ASP.NET MVC。我创建了这些模型类；

public class Event
{
    public int EventID { get; set; }
    [Required]
    public String Name { get; set; }
    [Required]
    public String Location { get; set; }
    [Required]
    public DateTime Date { get; set; }
    [Required]
    [DataType(DataType.MultilineText)]
    public String Description { get; set; }
    [Required]
    public int TicketsAvailable { get; set; }
    //navigation property
    public virtual ICollection<Order> Order { get; set; }
    //navigation property
    public virtual ICollection<Ticket> Ticket { get; set;}
 }

  public class Ticket
{
   public int TicketID { get; set; }
   [Required]
   [ForeignKey("Event")]
   //foreign key
    public int EventID { get; set; }
   [Required]
   public string Description { get; set; }
   [Required]
   public float Price { get; set; }       
    //navigation property
    public virtual Event Event { get; set; }
    //navigation property
    public ICollection<OrderDetails> OrderDetails { get; set; }
}

我已经对事件使用了 Scaffolded CRUD View ，然后我想将我创建的事件的 EventID 传递到 AddTicket View 并创建特定于该事件的新票证。 这是我的 Controller 类；

public class Events1Controller : Controller
{
    private IEventRepository _eventRepository;
    private ITicketRepository _ticketRepository;

    public Events1Controller()
    {
    this._eventRepository = new EventRepository(new ApplicationDbContext());
    this._ticketRepository = new TicketRepository(new ApplicationDbContext());
    }

    // GET: Events
    [AllowAnonymous]
    public ActionResult Index()
    {

        return View(_eventRepository.GetEvents());
    }
// GET: Events/Create
    [AllowAnonymous]
    public ActionResult Create()
    {
        return View();
    }

    // POST: Events/Create
    // To protect from overposting attacks, please enable the specific  properties you want to bind to, for 
    // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
    [HttpPost]
    [ValidateAntiForgeryToken]
    [AllowAnonymous]
    public ActionResult Create([Bind(Include = "EventID,Name,Location,Date,Description,TicketsAvailable")] Event @event)
    {
        if (ModelState.IsValid)
        {
            Session["Event1"] = @event;
            _eventRepository.InsertEvent(@event);

            return RedirectToAction("SaveTickets");
        }

        return View();
    }

    [AllowAnonymous]
    public ActionResult SaveTickets()
    {           
        Event @e1 = Session["Event1"] as Event;
        Ticket @ticket1 = new Ticket
        {
            EventID = @e1.EventID
        };

        return View(@ticket1);

    }



 // POST: Events/AddToTickets
    [HttpPost]
    [ValidateAntiForgeryToken]
    [AllowAnonymous]
    public ActionResult AddToTickets([Bind(Include = "TicketID, EventID,    Description, Price")] Ticket @ticket)
    {

        if (ModelState.IsValid)
        {
            _ticketRepository.InsertTicket(@ticket);
            return RedirectToAction("Index");
        }
        return View();
    }




<h2>Create</h2>

@using (Html.BeginForm())
{
 @Html.AntiForgeryToken()

<div class="form-horizontal">
    <h4>Event</h4>
    <hr />
    @Html.ValidationSummary(true, "", new { @class = "text-danger" })
    @Html.HiddenFor(model => model.TicketID)


    <div class="form-group">
        @Html.LabelFor(model => model.EventID, htmlAttributes: new { @class    = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.DisplayFor(model => model.EventID, new { htmlAttributes =   new { @class = "form-control" } })

        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Price, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Price, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Price,"",  new { @class = "text-danger" })
        </div>
    </div>



    <div class="form-group">
        @Html.LabelFor(model => model.Description, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Description, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Description, "", new { @class = "text-danger" })
        </div>
    </div>




    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <input type="submit" value="AddToTickets" class="btn btn-default" />

        </div>
    </div>
</div>
}

<div>
@Html.ActionLink("Back to List", "Index")

</div>

@section Scripts {
@Scripts.Render("~/bundles/jqueryval")
}

我在我的 razor View 中使用了表单，并且事件正确保存到数据库中，并且 EventID 正在票证中设置并传递到 SaveTicket View 。但是，当我尝试保存票证时，问题出现了，票证没有保存，页面只是刷新。我已经尝试了很多教程，但还没有一个为我提供解决方案，并且我已经被困了一周的大部分时间。

Answer 1

您的问题可能是您没有告诉您的<form>在哪里发布数据。

当你只使用 @using (Html.BeginForm()) 时它假设您要将数据发送回 View 来源的同一 URL，或者地址栏中的内容。

由于返回 View 的操作是 SaveTickets那么数据将发布到http://host/Events1/SaveTickets但是你的[HttpPost]行动是 AddToTickets .

您可以重命名 [HttpPost]行动至SaveTickets同样，这将是最简单的，或者告诉您的表单您想要发布到的网址/操作是什么。

@using (Html.BeginForm("AddToTickets","Events1"))

这可能会解决问题，但您想采纳 Stephen 的建议并为 Tickets 创建一个单独的 Controller ..