如何将数据库信息传输到 asp.net mvc 中的另一个 controller

Question

My goal: user chooses an item from list (list of items from database) and this item will show on another page.

I want to transfer key from database, that is chosen in one controller and have access of this chosen key from another controller.

My database was created by Entity Framework, one of my model.

My model of database:

public class Apartment
{
    // id of apartment
    [HiddenInput(DisplayValue = false)]
    public int ApartmentId { get; set; }

    // quantity in apartment
    [Required(ErrorMessage = "Поле должно быть установлено")]
    public int Quantity { get; set; }

    // class of apartment
    [Required(ErrorMessage = "Поле должно быть установлено")]
    public Classes Class { get; set; }

    // price of apartment
    [Required(ErrorMessage = "Поле должно быть установлено")]
    public int Price { get; set; }

    // start of book apartment
    [Required(ErrorMessage = "Поле должно быть установлено")]
    public DateTime Start { get; set; }

    // end of book apartment
    public DateTime End { get; set; }
}

// Class apartment in enum
public enum Classes
{
    Economy,
    Standard,
    Luxury
}

View, where user chooses his apartment:

foreach (Hotel.DAL.Entities.Apartment a in Model)
{
    <div id="ap" class="col-md-3">
        <p>Class: @a.Class
        <p>Quantity: @a.Quantity человек
        <p>Price for one day: @a.Price $

        @if (ViewBag.TimeInt != null)
        {
            ViewBag.FullPrice = a.Price * ViewBag.TimeInt;
            <p>Full price: @ViewBag.FullPrice $</p>
        }

        @if (HttpContext.Current.Request.HttpMethod == "POST")
        {
            <form asp-action="Index" method="post">
                <p>
                    <button value="Open Window" onclick="window.open('/Home/Confirm')" class="btn btn-primary">Book</button>
                    <input type="hidden" name="id" value="@a.ApartmentId" />
                </p>
            </form>
        }
</div>
}

Hidden type is an input, where I take a value of my key.

Controller method of view:

public ActionResult Index(string sortOrder)
{
    ViewData["ClassSortParm"] = sortOrder == "Class" ? "class_desc" : "Class";
    ViewData["PriceSortParm"] = sortOrder == "Price" ? "price_desc" : "Price";

    var p = from s in dbshow.GetList()
            select s;

    switch (sortOrder)
    {
        case "class_desc":
            p = dbshow.GetList().OrderByDescending(s => s.Class);
            break;

        case "price_desc":
            p = dbshow.GetList().OrderByDescending(s => s.Price);
            break;

        default:
            p = dbshow.GetList().OrderBy(s => s.Class);
            break;
    }

    return View(p);
}

// filters to book apartments
[HttpPost]
public ActionResult Index(string sortOrder, Classes? Class, int? quantity, DateTime? start, DateTime? end, bool? check)
{
    ViewData["CurrentQuan"] = quantity;
    ViewData["CurrentClass"] = Class;
    ViewData["CurrentStart"] = start;
    ViewData["CurrentEnd"] = end;
    ViewData["CurrentCheck"] = check.GetValueOrDefault();

    ViewData["ClassSortParm"] = sortOrder == "Class" ? "class_desc" : "Class";
    ViewData["PriceSortParm"] = sortOrder == "Price" ? "price_desc" : "Price";

    var aps = from s in dbshow.GetList()
              select s;

    return View(aps);
}

Controller that I need to transfer ApartmentId (key) is default:

public ActionResult Confirm()
{
    return View();
}

I heard that better way to did it by cookies. But I don't know how.

Answer 1

You can either create a cookie and read the content of the cookie or you can use sessions. See example: https://andrewlock.net/an-introduction-to-session-storage-in-asp-net-core/

Or another solution is to save their selection in the database and fetch it where you need it.

Update: Edit the form to post the key to /confirm/ so no need to persit this value in a cookie or a session