視圖無法識別viewmodel中的類

Question

正如您在代碼中看到的，我在RegistratieViewModel中有兩個類。當我將viewmodel傳遞給我的視圖時，它只識別Selectie類而不識別Reizigers？有人可以幫我嗎？ 我得到的錯誤：「CS1061 C＃不包含定義並沒有擴展方法接受一個類型的第一個參數可以找到（是否缺少using指令或程序集引用？）」

視圖模型

public class RegistratieViewModel 
    { 
     public SelectieViewModel Selectie { get; set; } 

     public List<ReizigersViewModel> Reizigers { get; set; } 

     public RegistratieViewModel() 
     { 
      Reizigers = new List<ReizigersViewModel>(); 
     } 
    } 

    public class SelectieViewModel 
    { 
     public SelectList VanStad { get; set; } 

     public SelectList NaarStad { get; set; } 

     public bool Klasse { get; set; } 

     public DateTime DatumHeenReis { get; set; } 

     public DateTime DatumTerugReis { get; set; } 

     public int AantalReizigers { get; set; } 
    } 

    public class ReizigersViewModel 
    { 
     public string Voornaam { get; set; } 

     public string Familienaam { get; set; } 
    } 

控制器

// GET: Hotels/Index 
    public ActionResult Index(RegistratieViewModel registratie) 
    { 
     stedenServices = new StedenServices(); 
     RegistratieViewModel registratieviewmodel = new RegistratieViewModel(); 
     registratieviewmodel.Selectie.VanStad = new SelectList(stedenServices.All(), "StadID", "Stad"); 
     registratieviewmodel.Selectie.NaarStad = new SelectList(stedenServices.All(), "StadID", "Stad"); 
     return View(registratieviewmodel); 
    } 

查看

@model Treinreizen.Models.ViewModels.RegistratieViewModel 

<div class="form-horizontal"> 
    <h4>RegistratieViewModel</h4> 
    <hr /> 
    @Html.ValidationSummary(true, "", new { @class = "text-danger" }) 

    <div class="form-group"> 
     @Html.LabelFor(model => model.Reizigers.Voornaam, htmlAttributes: new { @class = "control-label col-md-2" }) 
     <div class="col-md-10"> 
      @Html.EditorFor(model => model.Reizigers.Voornaam, new { htmlAttributes = new { @class = "form-control" } }) 
      @Html.ValidationMessageFor(model => model.Reizigers.Voornaam, "", new { @class = "text-danger" }) 
     </div> 
    </div> 

    <div class="form-group"> 
     @Html.LabelFor(model => model.Reizigers.Familienaam, htmlAttributes: new { @class = "control-label col-md-2" }) 
     <div class="col-md-10"> 
      @Html.EditorFor(model => model.Reizigers.Familienaam, new { htmlAttributes = new { @class = "form-control" } }) 
      @Html.ValidationMessageFor(model => model.Reizigers.Familienaam, "", new { @class = "text-danger" }) 
     </div> 
    </div> 
</div> 

Answer 1

問題是，您在List<ReizigersViewModel>上引用ReizigersViewModel上的某個屬性。該列表沒有該屬性，只有該列表中的單個項目。您無法爲整個集合創建一組字段。您必須迭代集合：

@for (var i = 0; i < Model.Reizigers.Count(); i++) 
{ 
    <div class="form-group"> 
     @Html.LabelFor(model => model.Reizigers[i].Voornaam, htmlAttributes: new { @class = "control-label col-md-2" }) 
     <div class="col-md-10"> 
      @Html.EditorFor(model => model.Reizigers[i].Voornaam, new { htmlAttributes = new { @class = "form-control" } }) 
      @Html.ValidationMessageFor(model => model.Reizigers[i].Voornaam, "", new { @class = "text-danger" }) 
     </div> 
    </div> 

    <div class="form-group"> 
     @Html.LabelFor(model => model.Reizigers[i].Familienaam, htmlAttributes: new { @class = "control-label col-md-2" }) 
     <div class="col-md-10"> 
      @Html.EditorFor(model => model.Reizigers[i].Familienaam, new { htmlAttributes = new { @class = "form-control" } }) 
      @Html.ValidationMessageFor(model => model.Reizigers[i].Familienaam, "", new { @class = "text-danger" }) 
     </div> 
    </div> 
} 

請注意在HtmlHelper表達式中使用索引語法。現在，您引用的是List<ReizigersViewModel>中的單個項目，即ReizigersViewModel，而不是整個列表。