Question

我是新手，我尝试找到此错误消息的解决方案：

“模型项目传入字典是类型 'NerdDinner.Controllers.DinnerFormViewModel'，但这本词典需要一个模型类型的项目 'NerdDinner.Models.Dinner'“

有类似的问题错误，但没有相同的上下文问题。我相信问题位于edit.aspx中，但仍然无法解决。

DinnersController控制器：

//
// GET: /Dinners/Create

public ActionResult Create()
{

    Dinner dinner = new Dinner()
    {
        EventDate = DateTime.Now.AddDays(7)
    };

    return View(new DinnerFormViewModel(dinner));
}

型号：

namespace NerdDinner.Models
{
    [MetadataType(typeof(Dinner_Validation))]
    public partial class Dinner
    {

    }

    public class Dinner_Validation
    {
        [Required(ErrorMessage = "Title is required")]
        [StringLength(50, ErrorMessage = "Title may not be longer than 50 characters")]
        public string Title { get; set; }

        [Required(ErrorMessage = "Description is required")]
        [StringLength(265, ErrorMessage =
          "Description must be 256 characters or less")]
        public string Description { get; set; }

        [Required(ErrorMessage = "Address is required")]
        public string Address { get; set; }

        [Required(ErrorMessage = "Country is required")]
        public string Country { get; set; }

        [Required(ErrorMessage = "Phone# is required")]
        public string ContactPhone { get; set; }
    }
}


namespace NerdDinner.Controllers
{
    public class DinnerFormViewModel
    {

        private static string[] _countries = new[] 
        {
            "USA",
            "Afghanistan",
            "Akrotiri",
            "Albania",
            //... omitted for brevity
            "Zimbabwe"
        };


        // Properties
        public Dinner Dinner { get; private set; }
        public SelectList Countries { get; private set; }

        // Constructor
        public DinnerFormViewModel(Dinner dinner)
        {
            Dinner = dinner;

            Countries = new SelectList(_countries, dinner.Country);
        }
    }
}

Edit.aspx：

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<NerdDinner.Controllers.DinnerFormViewModel>" %>

<asp:Content ID="Title" ContentPlaceHolderID="TitleContent" runat="server">
   Edit: <%: Model.Dinner.Title %>
</asp:Content>

<asp:Content ID="Main" ContentPlaceHolderID="MainContent" runat="server">

   <h2>Edit Dinner</h2>
   <% using (Html.BeginForm()) { %>
       <%: Html.ValidationSummary("Please correct the errors and try again.") %>
       <fieldset>
          <legend>Fields</legend>
           <div class="editor-label">
               <%: Html.LabelFor(m => m.Dinner.Title) %>
           </div>
           <div class="editor-field">
               <%: Html.TextBoxFor(m => m.Dinner.Title)%>
               <%: Html.ValidationMessageFor(m => m.Dinner.Title, "*")%>
           </div>
           <div class="editor-label">
               <%: Html.LabelFor(m => m.Dinner.EventDate) %>
           </div>
           <div class="editor-field">
               <%: Html.TextBoxFor(m => m.Dinner.EventDate)%>
               <%: Html.ValidationMessageFor(m => m.Dinner.EventDate, "*")%>
           </div>
           <div class="editor-label">
               <%: Html.LabelFor(m => m.Dinner.Description) %>
           </div>
           <div class="editor-field">
               <%: Html.TextAreaFor(m => m.Dinner.Description) %>
               <%: Html.ValidationMessageFor(m => m.Dinner.Description, "*") %>
           </div>
           <div class="editor-label">
               <%: Html.LabelFor(m => m.Dinner.Address) %>
           </div>
           <div class="editor-field">
               <%: Html.TextBoxFor(m => m.Dinner.Address) %>
               <%: Html.ValidationMessageFor(m => m.Dinner.Address, "*") %>
           </div>
<%: Html.LabelFor(m => m.Dinner.Country) %>
<%: Html.DropDownListFor(m => m.Dinner.Country, Model.Countries) %>
<%: Html.ValidationMessageFor(m => m.Dinner.Country, "*") %>
           <div class="editor-label">
               <%: Html.LabelFor(m => m.Dinner.ContactPhone)%>
           </div>
           <div class="editor-field">
               <%: Html.TextBoxFor(m => m.Dinner.ContactPhone)%>
               <%: Html.ValidationMessageFor(m => Model.Dinner.ContactPhone, "*") %>
           </div>
           <div class="editor-label">
               <%: Html.LabelFor(m => m.Dinner.Latitude)%>
           </div>
           <div class="editor-field">
               <%: Html.TextBoxFor(m => m.Dinner.Latitude)%>
               <%: Html.ValidationMessageFor(m => Model.Dinner.Latitude, "*") %>
           </div>
           <div class="editor-label">
               <%: Html.LabelFor(m => m.Dinner.Longitude)%>
           </div>
           <div class="editor-field">
               <%: Html.TextBoxFor(m => m.Dinner.Longitude)%>
               <%: Html.ValidationMessageFor(m => m.Dinner.Longitude, "*")%>
           </div>
           <p>
               <input type="submit" value="Save" />
           </p>
       </fieldset>

   <% } %>

</asp:Content>

Answer 1

您的“创建”操作将加载“Create.aspx”而非“Edit.aspx”，我怀疑仍然指向Dinner作为模型。

Answer 2

将正确的视图名称添加到ViewResult。

public ActionResult Create() 
{ 

    Dinner dinner = new Dinner() 
    { 
        EventDate = DateTime.Now.AddDays(7) 
    }; 

    return View("Edit", new DinnerFormViewModel(dinner)); 
}

Answer 3

@Lazarus：不错的选择！ @Matthew：你也是！ @FullmetalBoy：我认为你是ASP.NET MVC的新手。您只需要在控制器中创建操作，然后右键单击此操作并创建视图，这样您就不会错误地在View和Controller之间进行映射。在asp.net mvc主页上也有本教程。希望这个技巧对你有用，伙计！恕我直言。

视图和控制器之间没有连接

3 个答案: