ASP.NET MVC视图中的奇怪空引用异常

Question

我在razor视图中有这个奇怪的空引用异常，这是我的视图模型代码

    public class RoomWantedAd
    {
        private List<ItemResource> _ItemResources = null;
        public RoomWantedAd()
        {
            _ItemResources = new List<ItemResource>();
        }
        public int RoomWantedId { get; set; }
        public Item Item { get; set; }
        public ItemDescription ItemDescription { get; set; }
        public ItemWanted ItemWanted { get; set; }
        public ItemLocation ItemLocation { get; set; }
        public ItemAddress ItemAddress { get; set; }
        public string CityName { get; set; }
        public string AreaName { get; set; }
        public List<ItemResource> ItemResources
        {
            get { return _ItemResources; }
            set { _ItemResources = value; }
        }
        public string PlaceId { get; set; }

        public string strCanMoveInFrom { get; set; }
    }

和我的数据库模型ItemWanted.cs代码在这里

    using System;
    using System.Collections.Generic;
    using System.ComponentModel.DataAnnotations;
    using System.ComponentModel.DataAnnotations.Schema;
    using System.Data.Entity.Spatial;

    [Table("ItemWanted")]
    public partial class ItemWanted
    {
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
        public ItemWanted()
        {
        }
        [Key]
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public int ItemWantedId { get; set; }

        [ForeignKey("Item")]
        public int ItemId { get; set; }
        public int? Budget { get; set; }

        [StringLength(10)]
        public string BudgetTimeSpan { get; set; }

        public DateTime? CanMoveInFrom { get; set; }

        [StringLength(3)]
        public string DaysToStay { get; set; }

        public bool? ParkingAmenity { get; set; }

        public bool? BalconyAmenity { get; set; }

        public bool? GardenAmenity { get; set; }

        public bool? IsAmenityEnabled { get; set; }

        public bool? GarageAmenity { get; set; }

        public bool? BroadBandAmenity { get; set; }

        public bool? FurnishedAmenity { get; set; }

        [StringLength(15)]
        public string YourOccupation { get; set; }

        [StringLength(3)]
        public string Age1 { get; set; }

        [StringLength(3)]
        public string Age2 { get; set; }

        public bool? Smoker { get; set; }

        public bool? Pets { get; set; }

        [StringLength(20)]
        public string Language { get; set; }

        [StringLength(20)]
        public string Nationality { get; set; }

        [StringLength(20)]
        public string Interests { get; set; }

        [StringLength(20)]
        public string DisplayName { get; set; }

        [StringLength(15)]
        public string FlatMateGender { get; set; }

        public bool? FlatMateSmoking { get; set; }

        [StringLength(3)]
        public string FlatMateAge1 { get; set; }

        [StringLength(3)]
        public string FlatMateAge2 { get; set; }

        public bool? FlatMatePets { get; set; }

        [StringLength(15)]
        public string FlatMateOccupation { get; set; }

        public int? NumberOfViews { get; set; }

        [StringLength(15)]
        public string YourGender { get; set; }

        public virtual Item Item { get; set; }
    }

我的剃刀视图代码在这里

    </div>
<div class="row">
    <div class="col-md-9 text-left">
        <span>&pound</span> @Html.Label(RoomFlogContents.Classes.SearchUtility.GetPriceLabelItemWanted(item))
        <br />
        @Html.Label(item.ItemWanted.Item.ItemAddress.FormattedAddress, new { @class = "h4 inline-block" })
        @{
            DateTime dt = DateTime.Now;
            if (item.ItemWanted.CanMoveInFrom != null)
            {
                dt = (DateTime)item.ItemWanted.CanMoveInFrom;
            }

        }
            <br />
            <label>Can move in from:</label>
            @Html.Label(dt.ToString("dd/MM/yyyy"), new { @class = "h4 inline-block" })
    </div>
</div>

所有代码运行正常，但是当我的剃刀视图代码执行时，在行

@Html.Label(item.ItemWanted.Item.ItemAddress.FormattedAddress, new { @class = "h4 inline-block" })

和

@Html.Label(dt.ToString("dd/MM/yyyy"), new { @class = "h4 inline-block" })

我的代码崩溃并提供了一个空引用异常，我通过断点检查了属性是否为null，但每个实例属性都是正确实例化并包含值。

我也使用了null检查，但它仍然抛出异常。请有人帮助我。