Question

我有一个ViewModel：

public class RegistrationViewModel
{
    public string Country { get; set; }
    public ConfigurationParamValue CountryParam { get; set; }
    public string Civility { get; set; }
    public ConfigurationParamValue CivilityParam { get; set; }
    [FirstNameValidator(Category = "Registration", IsLocal = false )]
    public string FirstName { get; set; }
    public ConfigurationParamValue FirstNameParam { get; set; }
    [LastNameValidator(Category = "Registration", IsLocal = false)]
    public string LastName { get; set; }
    public List<int> Days { get; set; }
    public int SelectedDay{ get; set; }
    public List<Month> Months { get; set; }
    public Month SelectedMonth { get; set; }
    public List<int> Years { get; set; }
    public int SelectedYear { get; set; }
    public DateTime BirthDate { get; set; }
}

我用这个viewmodel创建一个视图：

@model Registration.Front.Web.Models.RegistrationViewModel

@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Index</h2>

@using (Html.BeginForm()) {
    @Html.AntiForgeryToken()
    @Html.ValidationSummary(true)

    <fieldset>
        <legend>RegistrationViewModel</legend>

        <div class="editor-label">
            @Html.LabelFor(model => model.Country)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Country)
            @Html.ValidationMessageFor(model => model.Country)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Civility)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Civility)
            @Html.ValidationMessageFor(model => model.Civility)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.FirstName)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.FirstName)
            @Html.ValidationMessageFor(model => model.FirstName)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.LastName)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.LastName)
            @Html.ValidationMessageFor(model => model.LastName)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.BirthDate)
        </div>
        <div class="editor-field">
            @Html.DropDownListFor(model => model.SelectedDay, new SelectList(Model.Days))
            @Html.ValidationMessageFor(model => model.BirthDate)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Occupation)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Occupation)
            @Html.ValidationMessageFor(model => model.Occupation)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.ZipCode)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.ZipCode)
            @Html.ValidationMessageFor(model => model.ZipCode)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Email)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Email)
            @Html.ValidationMessageFor(model => model.Email)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Password)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Password)
            @Html.ValidationMessageFor(model => model.Password)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.CGV)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.CGV)
            @Html.ValidationMessageFor(model => model.CGV)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.Optin)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Optin)
            @Html.ValidationMessageFor(model => model.Optin)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.CNIL)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.CNIL)
            @Html.ValidationMessageFor(model => model.CNIL)
        </div>

        <p>
            <input type="submit" value="Create" />
        </p>
    </fieldset>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

这是我的控制者：

public ActionResult Index()
        {
        List<int> listDays = new List<int>(){1, 2, 3};
        return View(new RegistrationViewModel() { Days=listDays });
        }

[HttpPost]
public ActionResult Index( RegistrationViewModel rvm)
       {
       if (ModelState.IsValid)
          { return RedirectToAction("Welcome"); }

       return View(rvm);
       }

public ActionResult Welcome()
      {
      return View();
      }

我的问题是在帖子中，属性视图模型的天数为空!!!!!我怎么能纠正这个？

Answer 1

在您的视图中，您不会在表格中呈现天数

在表单内渲染隐藏字段，其名称为“天”，如

foreach(var day in @Model.Days) { <input type="hidden" name="Days" /> }

复制上面的代码并粘贴后 <div class="editor-field"> @Html.EditorFor(model => model.CNIL) @Html.ValidationMessageFor(model => model.CNIL) </div>

现在，当您提交时，Days值也将提交给Post方法，您将在Days List中获得值。

提交列表在post + MVC中变为null

1 个答案: