CS1061:'IEnumerable<>'不包含''并且没有扩展方法'&#

Question

我是.net MVC的新手，请帮我解决问题。

我收到以下错误：CS1061:"IEnumerable"不包含"Name"的定义，并且找不到接受"IEnumarable"类型的第一个参数的扩展方法"Name"。

这是我的控制器public ActionResult Create（）{return Index（）；}

    [HttpPost]
    public ActionResult Create(Person model)
    {
        HttpClient client = new HttpClient();
        client.BaseAddress = new Uri("http://localhost:23793");
        client.PostAsJsonAsync<Person>("api/person", model)
            .ContinueWith((postTask) => postTask.Result.EnsureSuccessStatusCode());
        return RedirectToAction("Index");
    }

这是我的观点

           @model IEnumerable<PersonDemoMVC.Models.Person>
        @{
            ViewBag.Title = "Create";
        }
        <h2>Create</h2>

        @using (Html.BeginForm()) 
        {
            @Html.AntiForgeryToken()
            <div class="form-horizontal">
                <h4>Person</h4>
                <hr />
                @Html.ValidationSummary(true, "", new { @class = "text-danger" })
                <div class="form-group">
                    @Html.LabelFor(model => model.Name, htmlAttributes: new { @class = "control-label col-md-2" })
                    <div class="col-md-10">
                        @Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = "form-control" } })
                        @Html.ValidationMessageFor(model => model.Name, "", new { @class = "text-danger" })
                    </div>
                </div>
                <div class="form-group">
                    @Html.LabelFor(model => model.Age, htmlAttributes: new { @class = "control-label col-md-2" })
                    <div class="col-md-10">
                        @Html.EditorFor(model => model.Age, new { htmlAttributes = new { @class = "form-control" } })
                        @Html.ValidationMessageFor(model => model.Age, "", new { @class = "text-danger" })
                    </div>
                </div>
                <div class="form-group">
                    <div class="col-md-offset-2 col-md-10">
                        <input type="submit" value="Create" class="btn btn-default" />
                    </div>
                </div>
            </div>
        }
        <div>
            @Html.ActionLink("Back to List", "Index")
        </div>
        <script src="~/Scripts/jquery-1.10.2.min.js"></script>
        <script src="~/Scripts/jquery.validate.min.js"></script>
        <script src="~/Scripts/jquery.validate.unobtrusive.min.js"></script>

Answer 1

您的Create视图是强类型的Person实体（IEnumerable<Person>）的集合，并且在视图中执行类似Model.Name的代码（Html helper方法中的model=>model.Name）。此处Model是IEnumerable<Person>，IEnumerable没有Name属性！。

在创建视图中，使用Person的单个实例作为模型，而不是使用集合。

@model PersonDemoMVC.Models.Person
<h2>Create</h2>
@using(Html.BeginForm())
{
   @Html.TextBoxFor(s=>s.Name)
   <!-- Your existing form elements -->
   <input type="submit" />
}

Answer 2

由于您使用的模型是可枚举的，因此选择foreach或循环

@model IEnumerable<PersonDemoMVC.Models.Person>
        @{
            ViewBag.Title = "Create";
        }
        <h2>Create</h2>

        @using (Html.BeginForm()) 
        {
            @Html.AntiForgeryToken()
            <div class="form-horizontal">
                <h4>Person</h4>
                <hr />
                @Html.ValidationSummary(true, "", new { @class = "text-danger" })
     @foreach(var item in model)
       {
                <div class="form-group">
                    @Html.LabelFor(i => item.Name, htmlAttributes: new { @class = "control-label col-md-2" })
                    <div class="col-md-10">
                        @Html.EditorFor(i => item.Name, new { htmlAttributes = new { @class = "form-control" } })
                        @Html.ValidationMessageFor(i => item.Name, "", new { @class = "text-danger" })
                    </div>
                </div>
                <div class="form-group">
                    @Html.LabelFor(i => item.Age, htmlAttributes: new { @class = "control-label col-md-2" })
                    <div class="col-md-10">
                        @Html.EditorFor(i => item.Age, new { htmlAttributes = new { @class = "form-control" } })
                        @Html.ValidationMessageFor(i => item.Age, "", new { @class = "text-danger" })
                    </div>
                </div>
                <div class="form-group">
                    <div class="col-md-offset-2 col-md-10">
                        <input type="submit" value="Create" class="btn btn-default" />
                    </div>
                </div>
            </div>
       }
        }
        <div>
            @Html.ActionLink("Back to List", "Index")
        </div>
        <script src="~/Scripts/jquery-1.10.2.min.js"></script>
        <script src="~/Scripts/jquery.validate.min.js"></script>
        <script src="~/Scripts/jquery.validate.unobtrusive.min.js"></script>

Answer 3

您将模型定义为IEnumerable<PersonDemoMVC.Models.Person>。稍后尝试调用模型上的属性Name线路：@Html.LabelFor(model => model.Name, htmlAttributes: new { @class = "control-label col-md-2" })

您应该：

1. 将模型更改为类似的内容：PersonDemoMVC.Models.Person

或

2. 在模型中循环以接收单个Person对象实例

Answer 4

使用以下中的第一种方法

@Html.LabelFor（model=>model.First（）.Name，htmlAttributes:new｛@class="control label col-md-2"｝）