"IEnumerable <>"类型在未引用的程序集中定义

Question

我已将以下nuget包添加到我的MVC 5应用程序X.PagedList.Mvc中

我在控制器/视图中返回结果如下:

// Repo
public IPagedList<Post> GetPagedPosts(int pageNumber, int pageSize)
{
   var posts = _context.Post
      .Include(x => x.Category)
      .Include(x => x.Type);

   // Return a paged list
   return posts.ToPagedList(pageNumber, pageSize);

}

// View model
public class PostViewModel
{
   public IPagedList<Post> Posts { get; set; }
   ...
}

// Controller method
public ActionResult Index(int? page)
{

    int pageNumber = page ?? 1;
    int pagesize = 5;

    var posts = _PostRepository.GetPagedPosts(pageNumber, pagesize);

    var viewModel = new PostViewModel
    {
        Posts = posts,
        ...
    };

    return View(viewModel);
}

// View
@model MyApp.ViewModels.PostViewModel
@using X.PagedList.Mvc;
@using X.PagedList;

<p>Page @(Model.Posts.PageCount < Model.Posts.PageNumber ? 0 : Model.Posts.PageNumber) of @Model.Posts.PageCount </p>

但在我看来,我收到以下错误 The type 'IEnumerable<>' is defined in an assembly that is not referenced. System.Runtime...

我的应用程序中没有project.json文件,这是什么错误？

Answer 1

确保Web.config文件中包含以下行:

<compilation debug="true" targetFramework="4.6.1"> //don't need to change THIS line, just the content of this section
  <assemblies>
    <add assembly="System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
    <add assembly="System.Collections, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
  </assemblies>
</compilation>

Answer 2

我知道回答有点“太晚”，但是对于刚刚遇到此错误的人，我解决了它，就像错误的后半部分所说的只是在 Web 配置文件的程序集部分中添加了网络标准的程序集参考如下：

<configuration>
  ...
  <system.web>
    <compilation debug="true" targetFramework="4.6.1">
      <assemblies>
        <add assembly="netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51"/>
      </assemblies>
    </compilation>
  </system.web>
      ...
</configuration>