Asp.net 创建页面列表时出现问题

我正在尝试使用asp.net MVC，但在创建页面列表时遇到问题。当我的视图使用@model IEnumerable时，视图显示良好，但当我将其更改为 @型号列表或@model页面列表

我在视图中看到错误 “'List'不包含'Category1'的定义，并且找不到接受'List'类型的第一个参数的扩展方法'Category1'（是否缺少using指令或程序集引用？）”以及每行的类似方法。 模型、视图和控制器（仅索引方法）如下

可能是我在做一些愚蠢的事情，但任何帮助都将不胜感激。 谢谢

型号：

    namespace IssuesMVC.Models
    {
        using System;
        using System.Collections.Generic;
        using System.ComponentModel.DataAnnotations;
        using System.ComponentModel.DataAnnotations.Schema;
        using System.Data.Entity.Spatial;

        public partial class Issue
        {
            public int ID { get; set; }

            [Required]
            [StringLength(85)]
            public string Title { get; set; }

            public int? AssignedTo { get; set; }

            public int OpenedBy { get; set; }

            public DateTime? OpenedDate { get; set; }

            public DateTime? DueDate { get; set; }

            public DateTime? ClosedDate { get; set; }

            public int? Status { get; set; }

            public int? Category { get; set; }

            public int? Priority { get; set; }

            [Column(TypeName = "ntext")]
            public string Comment { get; set; }

            public virtual Category Category1 { get; set; }

            public virtual Contact Contact { get; set; }

            public virtual Contact Contact1 { get; set; }

            public virtual IssueComment IssueComment { get; set; }

            public virtual Priority Priority1 { get; set; }

            public virtual Status Status1 { get; set; }
        }
    }

视图：

---

@Html.DisplayNameFor（model=>model.FirstOrDefault（）.Contact.FirstName）

etc@StephenMuecke谢谢你的回复，这个语法解决了我的问题。你能帮我理解为什么吗？

DisplayNameFor（）

有两个重载-一个接受

TModel

，另一个

IEnumerable

-如果不是

IEnumerable

（即，声明为

@model IEnumerable

则属于

TModel

重载-在您的情况下

TModel

是

List

，而

List

仅包含属性

Count

等。）

    @model List<IssuesMVC.Models.Issue>
@using PagedList;
@using PagedList.Mvc;

<link href="~/Content/PagedList.css" rel="stylesheet" type="text/css" />

@{
    ViewBag.Title = "Issues";
}

<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>

<table class="table">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.Category1.Category1)

        </th>
        <th>
            @Html.DisplayNameFor(model => model.Contact.FirstName)

        </th>
        <th>
            @Html.DisplayNameFor(model => model.IssueComment.Comment)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Priority1.Priority1)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Status1.Status1)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Title)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.OpenedBy)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.OpenedDate)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.DueDate)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.ClosedDate)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Comment)
        </th>
        <th></th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.Category1.Category1)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Contact.FullName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.IssueComment.Comment)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Priority1.Priority1)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Status1.Status1)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Title)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Contact1.FullName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.OpenedDate)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.DueDate)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.ClosedDate)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Comment)
        </td>
        <td>
            @Html.ActionLink("Edit", "Edit", new { id=item.ID }) |
            @Html.ActionLink("Details", "Details", new { id=item.ID }) |
            @Html.ActionLink("Delete", "Delete", new { id=item.ID })
        </td>
    </tr>
}

</table>

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Entity;
using System.Linq;
using System.Net;
using System.Web;
using System.Web.Mvc;
using issuesMVC.Models;
using PagedList;

namespace IssuesMVC.Controllers
{
    public class IssuesController : Controller
    {
        private IssuesContext db = new IssuesContext();

        // GET: Issues
        public ActionResult Index(string sortOrder, string currentFilter, string searchString, int? page)
        {
            ViewBag.CurrentSort = sortOrder;
            ViewBag.OpenedDateParm = String.IsNullOrEmpty(sortOrder) ? "OpenedBy_desc" : "";
            ViewBag.OpenedByParm = sortOrder == "OpenedDate" ? "OpenedDate_desc" : "OpenedDate";
            page = 1;
            var issues = db.issues.Include(i => i.Category1).Include(i => i.Contact).Include(i => i.Contact1).Include(i => i.issueComment).Include(i => i.Priority1).Include(i => i.Status1);
            //int pageSize = 3;
            int pageNumber = (page ?? 1);

            switch (sortOrder)
            {
                case "OpenedBy_desc":
                    issues = issues.OrderByDescending(s => s.Contact1.LastName);
                    breai;
                case "OpenedDate":
                    issues = issues.OrderBy(s => s.OpenedDate);
                    breai;
                case "OpenedDate_desc":
                    issues = issues.OrderByDescending(s => s.OpenedDate);
                    breai;
                default:
                    issues = issues.OrderBy(s => s.Contact1.LastName);
                    breai;
            }


            return View(issues.ToList());

        }
    }
}