解决方案：传递到字典中的模型项的类型为'System.Collections.Generic.List`1 []'，但此字典需要类型为'System.Collections.Generic.IEnumerable`1 []'的模型项 [英] Solution for: The model item passed into the dictionary is of type 'System.Collections.Generic.List`1[]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable`1[]'

问题描述

大家好，



这是我在MVC4应用程序中定义的模型：

 使用系统; 
 使用 System.Collections.Generic; 
 使用 System.Linq; 
 使用 System.Web; 
 使用 System.Collections; 
 
 命名空间 BindPublicationsData.Models 
 {
  public  类发​​布
 {
  public   Int64  id { get ;  set ; } 
  public   string  title { get ;  set ; } 
  public   string  abstractInfo { get ;  set ; } 
  public   string  description { get ;  set ; } 
  public   string  authors { get ;  set ; } 
  public   string 理由{ get ;  set ; } 
  public   string  keyTakeways { get ;  set ; } 
  public   string  thumbnail { get ;  set ; } 
} 
} 

以下是Controller类：

 使用系统; 
 使用 System.Collections.Generic; 
 使用 System.Linq; 
 使用 System.Web; 
 使用 System.Web.Mvc; 
 
 命名空间 BindPublicationsData.Controllers 
 {
  public   class  PublicationController：Controller 
 {
  private  KnowledgeManagerEntities db =  new  KnowledgeManagerEntities（）; 
 
  public  ActionResult Index（）
 {
  var  publicationsList =（ from  eachPub  in  db.KM_Publication  select  eachPub）。ToList（）; 
 
  return 查看（db.KM_Publication.ToList（））; 
} 
} 
} 

最后下面是我的观点：

 @ model IEnumerable< BindPublicationsData.Models.Publication> 
 
 @ {
 ViewBag.Title =Index; 
} 
 
< h2>出版物< / h2> 
 
< table> 
 @foreach（模型中的var项目）{
< tr> 
< td> 
 @ Html.DisplayFor（modelItem => item.title）
< / td> 
< td> 
 @ Html.DisplayFor（modelItem => item.description）
< / td> 
< td> 
 @ Html.DisplayFor（modelItem => item.abstractInfo）
< / td> 
< / tr> 
} 
< / table> 

运行此应用程序后我我收到以下错误：



传入字典的模型项的类型为'System.Collections.Generic.List`1 [BindPublicationsData.KM_Publication] '，但是这个字典需要一个'System.Collections.Generic.IEnumerable`1 [BindPublicationsData.Models.Publication]'类型的模型项。



谁能告诉我为什么会收到这个错误？

解决方案

这一行：

  return 查看（db.KM_Publication.ToList（））; 

将List元素传递给视图，但是查看您被声明为数据（模型）的IEnumerable ...

 @ model IEnumerable <  < span class =code-leadattribute> bindpublicationsdata.models.publication  >  <   / bindpublicationsdata.models.publication  >  

您必须更改其中一个...例如

 @ model List <   bindpublicationsdata.models.publication  >  <   / bindpublicationsdata.models.publication  >  

Hi all,

Here is my Model defined in MVC4 application:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Collections;

namespace BindPublicationsData.Models
{
    public class Publication
    {
        public Int64 id { get; set; }
        public string title { get; set; }
        public string abstractInfo { get; set; }
        public string description { get; set; }
        public string authors { get; set; }
        public string rationale { get; set; }
        public string keyTakeways { get; set; }
        public string thumbnail { get; set; }        
    }
}

Below is the Controller class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace BindPublicationsData.Controllers
{
    public class PublicationController : Controller
    {       
        private KnowledgeManagerEntities db = new KnowledgeManagerEntities();

        public ActionResult Index()
        {
            var publicationsList = (from eachPub in db.KM_Publication select eachPub).ToList();
            
            return View(db.KM_Publication.ToList());
        }
    }
}

And finally below is my View:

@model IEnumerable<BindPublicationsData.Models.Publication>

@{
    ViewBag.Title = "Index";
}

<h2>Publication</h2>

<table>
@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.title)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.description)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.abstractInfo)
        </td>        
    </tr>
}
</table>

After running this application I am getting the following error:

The model item passed into the dictionary is of type 'System.Collections.Generic.List`1[BindPublicationsData.KM_Publication]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable`1[BindPublicationsData.Models.Publication]'.

Can any one tell me why I am getting this error?

解决方案

This line:

return View(db.KM_Publication.ToList());

Passes a List element to the view, but in the view you are declared the data (model) a IEnumerable...

@model IEnumerable<bindpublicationsdata.models.publication></bindpublicationsdata.models.publication>

You have to change one of them...like

@model List<bindpublicationsdata.models.publication></bindpublicationsdata.models.publication>

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