无法将类型为“ System.Collections.Generic.List`1 Models.Hospitals”的对象转换为类型为“ System.Collections.Generic.IEnumerable”的对象

如何解决无法将类型为“ System.Collections.Generic.List`1 Models.Hospitals”的对象转换为类型为“ System.Collections.Generic.IEnumerable”的对象

在浏览器中单击视图时，出现此错误，无法在MVC视图中投射对象... 这是医院模式：

public partial class Hospitals
    {
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage","CA2214:DoNotCallOverridableMethodsInConstructors")]
        public Hospitals()
        {
            this.hospital_orders = new HashSet<hospital_orders>();
        }
    
        public int hospital_id { get; set; }
        public string hospital_name { get; set; }

     

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage","CA2227:CollectionPropertiesShouldBeReadOnly")]
        public virtual ICollection<hospital_orders> hospital_orders { get; set; }
    }

这是hospital_orders模型：

public partial class hospital_orders
    {
        public int order_id { get; set; }
        public Nullable<int> hospital_id { get; set; }
        public Nullable<int> department_id { get; set; }
        public Nullable<int> employee_id { get; set; }
        public Nullable<int> status_id { get; set; }
        public string order_details { get; set; }
        public Nullable<int> user_id { get; set; }
        public Nullable<System.DateTime> order_date { get; set; }
        public Nullable<System.DateTime> update_date { get; set; }
        public Nullable<System.DateTime> deleted_date { get; set; }
        public string file { get; set; }
    
        public virtual Departments Departments { get; set; }
        public virtual Employees Employees { get; set; }
        public virtual Hospitals Hospitals { get; set; }
        public virtual order_status order_status { get; set; }
        public virtual Users_web Users_web { get; set; }
    }

这是控制器创建代码：

public ActionResult Create()
        {
            var hospName = db.Hospitals.ToList();
            List<SelectListItem> listhosp = new List<SelectListItem>();

            foreach (var item in hospName)
            {
                listhosp.Add(new SelectListItem { Text = item.hospital_name,Value = 
                          item.hospital_id.ToString()});
            }
            ViewBag.hospitalname = hospName;

            return View();
        }

这是查看代码：

<div class="form-group">
            @Html.LabelFor(model => model.Hospitals.hospital_name,htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.DropDownListFor(model => model.Hospitals.hospital_id,(IEnumerable<SelectListItem>) ViewBag.hospitalname,"Select Hospital",new { @class = "form-control" } )
                @Html.ValidationMessageFor(model => model.hospital_id,"",new { @class = "text-danger" })
          
            </div>
        </div>

该错误出现在带有dropdownlistfor的行中，如何解决此错误？

解决方法

我找到了解决方案，应将Viewbag分配中的错误分配给list 不要像下面这样变：

public ActionResult Create()
        {
            var hospName = db.Hospitals.ToList();
            List<SelectListItem> listhosp = new List<SelectListItem>();

            foreach (var item in hospName)
            {
                listhosp.Add(new SelectListItem { Text = item.hospital_name,Value = 
                          item.hospital_id.ToString()});
            }
           // ViewBag.hospitalname = hospName;  error here 

              ViewBag.hospitalname = listhosp ;
            return View();
        }