查看未通过模型的IEnumerable [英] View not passing Ienumerable of Model

问题描述

修改：删除了部分景观，使事情变得更简单。现在我只需要找出为什么视图不会发布该值

• ViewModelProspectUsers

• ViewModelProspectUsers

public class ViewModelProspectUsers
{

    public int Id { get; set; }
    public string User { get; set; }
    public IEnumerable<ViewModelProspectSelect> Prospects { get; set; }

}

ViewModelProspectSelect

ViewModelProspectSelect

public class ViewModelProspectSelect
{

    public int ProspectID { get; set; }
    public string Name { get; set; }
    public bool IsSelected { get; set; }

}

查看

View

@model OG.ModelView.ViewModelProspectUsers


@using (Html.BeginForm())
{

    @Html.HiddenFor(model => model.Id)

    <h5>Please Select Prospects you wish to assign to this User.</h5>

----- 这里是部分曾经是，这些值没有被发布到 [发布] 方法 ------

-----HERE is where the partial used to be, these values aren't being posted to the [Post] Method------

-----------------------------------------但是他们填充就好了----------------------------------------

-----------------------------------------However they are populating just fine----------------------------------------

        @foreach (var item in Model.Prospects)
        {
            @Html.HiddenFor(x => item.ProspectID)


                @Html.DisplayFor(x => item.Name)

                @Html.EditorFor(x => item.IsSelected)

        }

---

        @*@Html.Partial("_ShowProspectCheckedForUser", Model.Prospects)*@
        @*@Html.Partial("_ShowProspectCheckedForuser", new OG.ModelView.ViewModelProspectSelect())*@


    <input type="submit" value="Save changes" />
    @Html.ActionLink("Cancel", "Index")

}

• 发表

  • Post

     [HttpPost]
     public ActionResult UsersInProspect(ViewModelProspectUsers viewModel)   
    

  
  

  如果我是来看看 viewModel.Prospects（M = GT; m.isSelected） //＆LT; - 该值为空不宜

  If i were to look at viewModel.Prospects(m=>m.isSelected) //<- this value is Null shouldn't be

  我的视图模型Variableis显示的数据，但不适合了IEnumerable

  My viewmodel Variableis showing Data but not for the Ienumerable.

  推荐答案

  在用列表类型的对象打交道，你必须引用它们使用数组方式有一个方式产生的字段名称，该模型绑定器可以解析他们回来，即

  When dealing with list-type objects, you must reference them with array notation to have the field names generated in a way that the modelbinder can parse them back, i.e:

  for (var i = 0; i < Model.Count(); i++)
  {
      @Html.LabelFor(m => Model[i].SomeProperty)
      @Html.EditorFor(m => Model[i].SomeProperty)
  }
  

  在您的情况，你最好用视图模型包含列表和添加服选属性的项目，这样就可以跟踪哪些人或未被选中。

  In your scenario, you'd be better served by using a view model to contain your list and adding a Selected property to the items so that you can track which ones were or were not selected.

  public class ViewModelProspects
  {
      public List<ViewModelProspectSelect> Prospects { get; set; }
  }
  
  public class ViewModelProspectSelect
  {
      // Whatever else you have
  
      public bool Selected { get; set; }
  }
  

  然后，在你的看法：

  Then, in your view:

  @model ViewModelProspects
  
  @using (Html.BeginForm())
  {
      for (var i = 0; i < Model.Prospects.Count(); i++)
      {
          <label>
              @Html.HiddenFor(m => Model.Prospects[i].Id)
              @Html.CheckboxFor(m => Model.Prospects[i].Selected, true)
              @Model.Prospects[i].Name
          </label>
      }
  }
  

  最后，改变你的操作方法签名：

  And finally, change your action method signature:

  [HttpPost]
  public ActionResult UsersInProspect(ViewModelProspects model)
  

  然后，您可以很容易地获得与动作内选定ID列表：

  Then, you can easily get the list of selected ids inside the action with:

  var selectedIds = model.Prospects.Where(m => m.Selected).Select(m => m.Id)
  

  这篇关于查看未通过模型的IEnumerable的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！