c# - CS1061 : 'IEnumerable<>' does not contain a definition for '' and no extension method '' accepting a first argument of type 'IEnumerable<>'

Question

我是 .net MVC 的新手，请帮我解决我的问题。

我收到这个错误:CS1061:“IEnumerable”不包含“Name”的定义，并且找不到接受“IEnumerable”类型的第一个参数的扩展方法“Name”。

这是我的 Controller 公共(public) Action 结果创建() { 返回索引()；

    [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

您的创建 View 被强类型化为 Person 的集合entity( IEnumerable<Person> )，在您看来，您正在执行类似 Model.Name 的代码(Html 辅助方法中的model=>model.Name)。这里的模型是 IEnumerable<Person> IEnumerable 没有 Name属性(property)!。

不使用集合，而是使用 Person 的单个实例作为创建 View 中的模型。

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