传递到字典中的模型项的类型为“ ViewModels.SiteModel”，

问题描述

我是MVC架构的新手。当我尝试更新时，它显示错误，这很奇怪，但是数据正在更新。

I'm newbie to MVC architecture.When I'm trying to update, its showing error ,Its totally strange but the data is updating.

传递到字典中的模型项的类型为 CMS.Domain.Models.Site，但是此字典需要模型项的类型为 CMS.Web.ViewModels.SiteModel。。

描述：当前Web请求执行期间发生未处理的异常。请查看堆栈跟踪，以获取有关错误及其在代码中起源的详细信息。

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

异常详细信息：System.InvalidOperationException：传入字典的模型项为类型为 CMS.Web.ViewModels.SiteModel，但此字典需要类型为 System.Collections.Generic.IEnumerable`1 [CMS.Web.ViewModels.SiteModel]的模型项。

Exception Details: System.InvalidOperationException: The model item passed into the dictionary is of type 'CMS.Web.ViewModels.SiteModel', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable`1[CMS.Web.ViewModels.SiteModel]'.

我的代码如下：

ViewModels：

ViewModels:

namespace CMS.Web.ViewModels
{
    public class SiteModel
    {

        public SiteModel()
        {
            SiteStatus = new List<SelectListItem>();
        }

        [Key]
        public int ID { get; set; }

        [Required(ErrorMessage = "Site Name is required")]
        [Display(Name = "Site Name")]
        public string Title { get; set; }


        [Display(Name = "Require Login")]
        public bool RequiresLogin { get; set; }

        [Display(Name = "Force HTTPS")]
        public bool ForceHTTPS { get; set; }

        [Display(Name = "Enable Approval")]
        public bool Approval { get; set; }

        [AllowHtml]
        public IList<SelectListItem> SiteStatus { get; set; }

        public bool Deleted { get; set; }

        public string CreatedBy { get; set; }

        public DateTime CreatedOn
        {
            get { return _createdOn; }
            set { _createdOn = value; }
        }
        private DateTime _createdOn = DateTime.Now;

        public string LastUpdatedBy { get; set; }

        public DateTime LastUpdatedOn  
        {
            get { return _lastUpdatedOn; }
            set { _lastUpdatedOn = value; }
        }
        private DateTime _lastUpdatedOn = DateTime.Now;

        [Display(Name = "Site State")]
        public string SiteState { get; set; }

    }
}

型号：

namespace CMS.Domain.Models
{
    public partial class Site : Model
    {

        public string Title { get; set; }
        public bool Approval { get; set; }
        public bool RequiresLogin { get; set; }
        public bool ForceHTTPS { get; set; }
        public virtual string SiteStatus { get; set; }
        public bool Deleted { get; set; }

    }
}

控制器：

 public ActionResult Index()
        {
            var _sites = _siterepository.FindAll();
            return View(_sites);
        }

        public ActionResult Add()
        {
            var model = new SiteModel();
            var _SiteStatus = _siterepository.GetSiteStatus();
            foreach (var _sitestatus in _SiteStatus)
            {
                model.SiteStatus.Add(new SelectListItem()
                { 
                    Text = _sitestatus.StatusName, 
                    Value = _sitestatus.StatusName.ToString()
                });

            }
            return View(model);
        }

        [HttpPost]
        public ActionResult Add(SiteModel _sitemodel)
        {
            var model = _sitemodel.ToEntity();
            _siterepository.Add(model);
            return View(model);
        }

        public ActionResult Edit(int id)
        {
            var model = new SiteModel();
            var Site = _siterepository.Find(id);
            model = Site.ToModel();
            var _SiteStatus = _siterepository.GetSiteStatus();

            foreach (var _sitestatus in _SiteStatus)
            {
                model.SiteStatus.Add(new SelectListItem()
                {
                    Text = _sitestatus.StatusName,
                    Value = _sitestatus.StatusName.ToString(),
                    Selected = _sitestatus.StatusName == Site.SiteStatus
                });

            }

            return View(model);
        }

        [HttpPost]
        public ActionResult Edit(SiteModel _sitemodel)
        {
            var model = _sitemodel.ToEntity();
            _siterepository.Update(model);
            return View(model);
        }

我正在努力解决此问题，请提供帮助。

I'm struggling to resolve this , please help.

推荐答案

检查View的模型声明。它需要一个可枚举的列表（ IEnumerable< CMS.Web.ViewModels.SiteModel> ），但是您将其传递给 CMS.Web的单个实例。 .ViewModels.SiteModel

Check your View's model declaration. It is expecting an enumerable list (IEnumerable<CMS.Web.ViewModels.SiteModel>), but you are passing it a single instance of CMS.Web.ViewModels.SiteModel

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