传入 ViewDataDictionary 的模型项是错误类型

Question

我的应用程序可能不好我正在努力学习 这个错误的解决方案是什么？ The error i got

控制器我不知道如何列出清单，我试过的例子没有用我想我需要以某种方式列一个清单

     public IActionResult Rooms()
        {

            using (var db = new HotelWebContext())
            {
                var roomList = db.Rooms.Where(z => z.OtherTypeId == z.OtherType.OtherTypeId && z.RoomTypeId == z.RoomType.RoomTypeId && z.StatusId == z.Status.RoomStatusId).Select(r => new { r.RoomId, r.OtherType.OtherTypeName, r.OtherType.BasePrice, r.OtherType.Capacity, r.OtherType.BedType, r.OtherType.Services, r.RoomType.RoomTypeName, r.Status.RoomStatusName }).ToList();

                return View(roomList);
            }


        }

型号我使用 entity framework

自动创建了它

public partial class Room
    {
        public Room()
        {
            Reservations = new HashSet<Reservation>();
        }

        public int RoomId { get; set; }
        public int? RoomTypeId { get; set; }
        public int? OtherTypeId { get; set; }
        public int? StatusId { get; set; }

        
        public virtual OtherType OtherType { get; set; }
        public virtual RoomType RoomType { get; set; }
        public virtual RoomStatus Status { get; set; }
        public virtual ICollection<Reservation> Reservations { get; set; }
    }

Rooms.cshtml 有一个 foreach 循环

@model IEnumerable<WebApplication3.Models.Room>

@{
    ViewData["Title"] = "Odalarımız";
    ViewData["Dark"] = "text-dark";
    ViewData["Info"] = "text-info";
}
<div class="odafiyatlari mx-auto">
    <div class="odaimg">
        <div class="container">
            <h1 style="margin-top: 200px; margin-bottom: 200px;font-family: 'Playfair Display', serif;" class="text-center text-dark ">ODALARIMIZ</h1>
            <div class="row">


                <!-- @for (int i = 0; i < 0; i++)
                {
                    <div class="col-xl-4 py-4">
                        <div style="border-radius: 10px;" class="card mx-auto" style="width: 18rem;">
                            <img class="card-img-top " src="~/images/oda1.jpg" alt="Card image cap">
                            <div class="card-body">
                                <h6 class="card-text">Durum:Uygun</h6><br>
                                <h5 class="card-title">İki Kişilik İkiz Yataklı Oda</h5>
                                <h5 class="card-title">Oda Tipi:Aile</h5>
                                <h6 class="card-text">399₺ / Gecelik</h6><br>
                                <h6 class="card-text">Kapasite: İki Kişilik</h6><br>
                                <h6 class="card-text">Yatak: Kral Yatak</h6><br>
                                <h6 class="card-text">Servis: İnternet, Televizyon, Duş</h6><br>
                                <a href="#" class="btn btn-info">Odayı Seç</a>
                            </div>
                        </div>
                    </div>
                }-->
                @foreach (var item in Model)
                {
                    <div class="col-xl-4 py-4">
                        <div style="border-radius: 10px;" class="card mx-auto" style="width: 18rem;">
                            <img class="card-img-top " src="~/images/oda1.jpg" alt="Card image cap">
                            <div class="card-body">
                                <h6 class="card-text">Durum:@item.Status.RoomStatusName</h6><br>
                                <h5 class="card-title">@item.OtherType.OtherTypeName</h5>
                                <h5 class="card-title">Oda Tipi:@item.RoomType.RoomTypeName</h5>
                                <h6 class="card-text">@item.OtherType.BasePrice₺ / Gecelik</h6><br>
                                <h6 class="card-text">Kapasite: @item.OtherType.Capacity</h6><br>
                                <h6 class="card-text">Yatak: @item.OtherType.BedType</h6><br>
                                <h6 class="card-text">Servis: @item.OtherType.Services</h6><br>
                                <a href="#" class="btn btn-info">Odayı Seç</a>
                            </div>


                        </div>


                    </div>
                }
            </div>
        </div>
    </div>
</div>
<!--ODA BİTİŞ-->

Model

Answer 1

您正在通过调用

将您的房间投影到一个具有值的新匿名对象中

.Select(r => new { r.RoomId, r.OtherType.OtherTypeName, r.OtherType.BasePrice, r.OtherType.Capacity, r.OtherType.BedType, r.OtherType.Services, r.RoomType.RoomTypeName, r.Status.RoomStatusName })

现在你得到了一个匿名类型的 IEnumerable。但是该操作需要 return 个 IEnumerable 房间。只需删除 select 你应该就好了，因为你正在从房间 table.

中检索

Answer 2

您传递给视图的列表应该是房间类型 Class。

Answer 3

您需要使用 .Include() 方法来包含如下相关模型：

var model = db.Rooms
    .Where(z => z.OtherTypeId == z.OtherType.OtherTypeId && z.RoomTypeId == z.RoomType.RoomTypeId && z.StatusId == z.Status.RoomStatusId)
    .Include(r=>r.OtherType)
    .Include(r=>r.RoomType)
    .Include(r=>r.Status)
    .ToList();

传入 ViewDataDictionary 的模型项是错误类型

The model item passed into the ViewDataDictionary is of type Error

c#

model-view-controller

entity-framework

asp.net-core-mvc