该模型产品类型CookMeIndexViewModel，但需要IEnumerable类型℃的模型项目; CookMeIndexViewModel＆GT;

问题描述

我的音乐商店示例下面一起去尝试学习ASP.NET MVC。我创建一个应用程序的食谱。

I am following along with the music store example to try learn ASP.NET MVC. I'm creating a cookbook application.

我创建我的视图模型，看起来像这样：

I have created my viewmodel that looks like this:

namespace CookMe_MVC.ViewModels
{
    public class CookMeIndexViewModel
    {
        public int NumberOfReceipes { get; set; }
        public List<string> ReceipeName { get; set; }
    }
}

我的控制器看起来像这样

my controller looks like this

public ActionResult Index()
    {
        var meals= new List<string> { "Dinner 1", "Dinner 2", "3rd not sure" };
       //create the view model
        var viewModel = new CookMeIndexViewModel
        {
            NumberOfReceipes = meals.Count(),
            ReceipeName = meals
        };
        return View(viewModel);
    }

最后我的看法是这样的。

Finally my view looks like this

 @model IEnumerable<CookMe_MVC.ViewModels.CookMeIndexViewModel>

@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>
<table>
    <tr>
        <th></th>
        <th>
            Meals
        </th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.ActionLink("Edit", "Edit", new { /* id=item.PrimaryKey */ }) |
            @Html.ActionLink("Details", "Details", new { /* id=item.PrimaryKey */ }) |
            @Html.ActionLink("Delete", "Delete", new { /* id=item.PrimaryKey */ })
        </td>
        <td>
            @item.ReceipeName
        </td>
    </tr>
}

</table>

我得到这个错误。

I get this error.

传递到字典中的模型产品类型的 CookMeIndexViewModel ，但本词典需要类型的模型项目的IEnumerable＆LT; CookMeIndexViewModel＆GT; 。

我也跟着例子。我看不到我在做什么错。我应该返回我的视图模型作为一个通用的列表？

I have followed the example. I can't see what I am doing wrong. Should I be returning my viewmodel as a generic list?

推荐答案

在你看来，你正在使用 @model IEnumerable的＆LT; CookMe_MVC.ViewModels.CookMeIndexViewModel＆GT; 这表明模型由视图预期是CookMeIndexViewModel的IEnumerable类型的。

In your view you are using @model IEnumerable<CookMe_MVC.ViewModels.CookMeIndexViewModel> which indicates that the model expected by the View is of type IEnumerable of CookMeIndexViewModel.

然而，在控制器您传递类型CookMeIndexViewModel的对象作为模型返回视图（视图模型）; 因此误差

However in the controller you are passing an object of type CookMeIndexViewModel as a model return View(viewModel); hence the error.

要么改变视图有 @model CookMe_MVC.ViewModels.CookMeIndexViewModel

或传递的IEnumerable CookMeIndexViewModel作为模型，在控制器中的视图下方给出：

or pass a IEnumerable of CookMeIndexViewModel as model to the view in controller as given below:

public ActionResult Index()
{
        var meals= new List<string> { "Dinner 1", "Dinner 2", "3rd not sure" };
     //create the view model
        var viewModel = new CookMeIndexViewModel
        {
                NumberOfReceipes = meals.Count(),
                ReceipeName = meals
        };
        List<CookMeIndexViewModel> viewModelList = new List<CookMeIndexViewModel>();
        viewModelList.Add(viewModel);
        return View(viewModelList);
}

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