我在我的项目中有一个视图，它包含了一个动态模型的其他模型，问题是页面加载，但页面保持空白，即使数据库有条目，在打开页面时有四个错误（2种类型的错误）：
Using the generic type 'IEnumerable<T> requires 1 type argument'
//and
The non-generic type 'ConcertViewModel' cannot be used with type parameters我的视图模型：
public class ConcertViewModel
{
public IEnumerable<ClassicalConcert> ClassicalConcerts { get; set; }
public IEnumerable<RegularConcert> RegularConcerts { get; set; }
public IEnumerable<Party> Parties { get; set; }
}我的控制者：
public class ConcertController : Controller
{
private readonly AppDbContext _context;
public ConcertController(AppDbContext context)
{
_context = context;
}
public IActionResult Concerts()
{
ConcertViewModel allConcerts = new ConcertViewModel();
allConcerts.RegularConcerts = _context.RegularConcerts;
allConcerts.ClassicalConcerts = _context.ClassicalConcerts;
allConcerts.Parties = _context.Parties;
return View(allConcerts);
}
}我的观点：
@model ConcertViewModel
@{
ViewData["Title"] = "Concerts";
}
<h1>Concerts</h1>
<div class="row">
<div class="col-md-8 offset-md-2">
<table>
<thead>
<tr>
</tr>
</thead>
<tbody>
@foreach (ClassicalConcert classicalConcert in Model.ClassicalConcerts)
{
<tr>
<td class="align-middle">
<img class="rounded-circle" src ="@classicalConcert.ImageURL" alt="@classicalConcert.PerformerName" style="max-width: 150px"></img>
</td>
<td class="align-middle">
@Html.DisplayFor(model => classicalConcert.PerformerName)
</td>
<td class="align-middle">
@Html.DisplayFor(model => classicalConcert.TicketsCount)
</td>
<td class="align-middle">
@Html.DisplayFor(model => classicalConcert.PerformanceDate)
</td>
<td class="align-middle">
@Html.DisplayFor(model => classicalConcert.Location)
</td>
<td class="align-middle">
@Html.DisplayFor(model => classicalConcert.Description)
</td>
<td class="align-middle">
@Html.DisplayFor(model => classicalConcert.VoiceType)
</td>
<td class="align-middle">
@Html.DisplayFor(model => classicalConcert.ConcertName)
</td>
<td class="align-middle">
@Html.DisplayFor(model => classicalConcert.ComposersName)
</td>
<td class="align-middle">
<a class="btn btn-outline-primary"><i class="bi bi-pencil-square"></i>Edit</a>|
<a class="btn btn-outline-info"><i class="bi bi-eye"></i>Details</a>|
<a class="btn btn-danger"><i class="bi bi-trash"></i>Delete</a>
</td>
</tr>
@foreach(Party party in Model.Parties)
{
<tr>
<td class="align-middle">
<img class="rounded-circle" src="@party.ImageURL" alt="@party.PerformerName" style="max-width: 150px"></img>
<td class="align-middle">
@Html.DisplayFor(model => party.PerformerName)
</td>
<td class="align-middle">
@Html.DisplayFor(model => party.TicketsCount)
</td>
<td class="align-middle">
@Html.DisplayFor(model => party.PerformanceDate)
</td>
<td class="align-middle">
@Html.DisplayFor(model => party.Location)
</td>
<td class="align-middle">
@Html.DisplayFor(model => party.Description)
</td>
<td class=" align-middle">
@Html.DisplayFor(model => party.AgeLimit)
</td>
</tr>
}
@foreach (RegularConcert regular in Model.RegularConcerts)
{
<tr>
<td class="align-middle">
<img class="rounded-circle" src="@regular.ImageURL" alt="@regular.PerformerName" style="max-width: 150px"></img>
<td class="align-middle">
@Html.DisplayFor(model => regular.PerformerName)
</td>
<td class="align-middle">
@Html.DisplayFor(model => regular.TicketsCount)
</td>
<td class="align-middle">
@Html.DisplayFor(model => regular.PerformanceDate)
</td>
<td class="align-middle">
@Html.DisplayFor(model => regular.Location)
</td>
<td class="align-middle">
@Html.DisplayFor(model => regular.Description)
</td>
</tr>
}
}
</tbody>
<tr>
<td>
</td>
</tr>
</table>
</div>
</div>这个错误甚至没有出现在我编写的代码中。
- 编辑：**
我今天回到项目中，错误已经消失，但它仍然无法从数据库中获取数据
我检查了数据库，至少有一个交易方应该显示在页面上
- 错误图像：**
- 错误图像：**
1条答案
按热度按时间agxfikkp1#
解决方案很简单，在我的数据库中有三个单独的模型分别对应于每个模型，我有一个类型党的单一数据库记录，我没有填写其他模型，所以所有的模型返回空，我修复了它，只是添加了一些其他类型的记录（常规音乐会，古典音乐会）到数据库中，网站开始像一个魅力。