Question

我有一个视图，我在其中创建新对象并将其传递给另一个视图：

cs

我在“ChooseCars”中的

：

  [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create([Bind(Include = "ID,carID,DateFrom,DateTo,UserID")] Reservation reservation)
    {

            if (ModelState.IsValid)
            {
                return RedirectToAction("ChooseCars",reservation);
            }

            return View(reservation);
        }

并在那个“ChooseCars”视图中我用没有保留的汽车列表填充表格。现在我需要以某种方式将该预订和选择的汽车（通过id）传递给我创建新“预订”的某种方法包含carId的对象。

最好的方法是什么？

我写了一个方法，但我不知道如何将这些参数路由到它：

public ActionResult ChooseCars(Reservation reservation)
    {
        var reservations = db.Reservations.ToList();
        var cars = db.Cars.ToList();

        var reservationsResult = reservations.Where(res => res.DateFrom <= reservation.DateFrom && res.DateTo >= reservation.DateTo); 

        if (reservationsResult != null) 
        {
          emptyCars = cars.Where(c => !reservationsResult.Any(y => y.carID == c.ID));  
          cars = emptyCars.ToList();
        }


        return View(cars);
    }

外观如何：

Answer 1

您的编辑数据，因此首先要创建一个表示您想要在视图中编辑/显示的视图模型。在您的情况下，您需要开始和结束日期，Car和所选汽车的集合。

public class ReservationVM // add validation and display attributes as appropriate
{
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
    public int? SelectedCar { get; set; }
    public IEnumerable<Car> AvailableCars { get; set; }
}

你的控制器方法将是

[HttpGet]
public ActionResult Create()
{
    ReservationVM model = new ReservationVM();
    return View(model);
}

[HttpPost]
public ActionResult Create(ReservationVM model)
{
    if (!ModelState.IsValid)
    {
        return View(model);
    }
    var availableCars = ... // your query to load the collection of cars basd on the dates
    if (!availableCars.Any())
    {
        ModelState.AddModelError("", "There are no cars available for these dates");
        return View(model);
    }
    model.AvailableCars = availableCars;
    return View("SelectCar", model);
}

[HttpPost]
public ActionResult Confirm(ReservationVM model)
{
    // Initialize new Reservation, save and redirect
    Reservation reservation = new Reservation()
    {
        StartDate = model.StartDate,
        EndDate = model.EndDate,
        CarId = model.SelectedCar.Value,
        UserId = ... // current user?
    };
    db.Reservations.Add(reservation);
    db.SaveChanges();
    return RedirectToAction(....);`
}

视图将是

Create.cshtml

@model ReservationVM
...
@using (Html.BeginForm())
{
    @Html.TextBoxFor(m => m.StartDate)
    @Html.TextBoxFor(m => m.EndDate)
    <input type="submit" value="Next" />
}

SelectCar.cshtml

@model ReservationVM
....
<table>
    @foreach(var car in Model.AvailableCars)
    {
        <tr>
            <td>@car.Make</td>
            <td>@car.Model</td>
            ....
            <td>
                @using (Html.BeginForm("Confirm", "Home", new { StartDate = Model.StartDate, EndDate = Model.EndDate, SelectedCar = car.ID }))
                {
                    <input type="submit" value="Reserve" />
                }
            </td>
        </tr> 
    }
</table>

将2个参数传递到视图中

1 个答案: