Mvc错误 - 需要类型为ienumerable的模型项 [英] Mvc error - requires model item of type ienumerable

问题描述

我是MVC和LinqToSql的新手。我正在尝试创建一个小应用程序，列出使用这两种技术的联系人。



我尝试过：



我的型号：

I'm new to both MVC and LinqToSql. I'm trying to create a small application that lists contacts using both technologies.

What I have tried:

My Model:

public class Contact
{
    [Key]
    public int Id { get; set; }
    [Required]
    public string Name { get; set; }
    [Range(18, 99)]
    public int? Age { get; set; }
    [EmailAddress]
    public string Email { get; set; }
    [Phone]
    public string Phone { get; set; }
    public Gender? Gender { get; set; }
    public string Address { get; set; }
}

public enum Gender { Male, Female }

我的控制器：

My Controller:

public class ContactController : Controller
{
    private static string conStr = ConfigurationManager.ConnectionStrings["conStr"].ConnectionString;
    LinqToSqlDataContext db = new LinqToSqlDataContext(conStr);

    // GET: Contacts
    public ActionResult Index()
    {
        IList<Contact> contactList = new List<Contact>();
        var listdata = (from c in db.Contacts select c).ToList();

        foreach (var item in listdata)
        {
            contactList.Add(new Contact()
            {
                Id = item.Id,
                Name = item.Name,
                Age = item.Age,
                Email = item.Email,
                Phone = item.Phone,
                Gender = item.Gender,
                Address = item.Address
            });
        }
        return View(contactList);
    }

我的观点：

My View:

@model IEnumerable<ContactsApp.Models.Contact>

@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

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

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

运行时我收到以下错误：

When I run this I get the following error:

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

我很感激帮助理解我做错了什么。

谢谢。

I'd appreciate help in understanding exactly what I am doing wrong.
Thank you.

推荐答案

好吧，既然IList实现了IEnumerable，那你应该很好。



但是，你没有真正阅读错误信息。你显然有两个不同的Contact类。一次在名为 ContactsApp 的名称空间中，另一名在名为 ContactsApp.Models 的名称空间中。这两个是不可互换的。



您需要更改Razor代码中的 @model 行或更改您要添加到列表中的哪个对象。当然，我不能告诉你要做哪一个。

Well, since IList implements IEnumerable, you should be good there.

But, you didn't really read the error message. You apparently have two different Contact classes. once in a namespace called ContactsApp and the other in a namespace called ContactsApp.Models. The two are not interchangeable.

You need to either change the @model line in you Razor code or change which object you're adding to the list. Of course, I can't tell you which one to do.

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