razor - MVC 4 Razor 我无法在 foreach 中显示列表项

Question

我想显示一个列表的内容，它是我的模型的一个属性，但呈现的 HTML 代码是空的，这里是我的代码：

看法

@foreach (Namespace.Models.Criteria crit in Model.CriteriaListToSearch)
{
    <div class="selectedItem">@crit.CriteriaType : @crit.TextToSearch</div>
}

查看模型

public class Search
{
    public IEnumerable<EquipmentModel> Equipments;
    public IEnumerable<SparePartsModel> SpareParts;
    public List<Criteria> CriteriaListToSearch;

    public Search()
    {
        CriteriaListToSearch = new List<Criteria>();
    }

    #region Criteria

    private List<SelectListItem> _CriteriaList;                
    public List<SelectListItem> CriteriaList
    {
        get
        {
            if (_CriteriaList == null)
            {
                _CriteriaList = new List<SelectListItem>(4) 
                { 
                    new SelectListItem { Value = "", Text = "Select an option"},
                    new SelectListItem { Value = "1", Text = "Name/Number"},
                    new SelectListItem { Value = "2", Text = "Type"},
                    new SelectListItem { Value = "3", Text = "Description"}
                };
            }

            return _CriteriaList;
        }
    }

    [Display(Name = "Options")]
    [Required(ErrorMessage = "Please select an option.")]
    public string CriteriaSelected { get; set; }

    [Required(AllowEmptyStrings = false, ErrorMessage = "The search field is required.")]
    [Display(Name = "Search")]
    [StringLength(100)]
    public string TextToSearch { get; set; }

    #endregion
}

public class Criteria
{
    public string CriteriaType;
    public string TextToSearch;
}

Model.CriteriaListToSearch 是我的列表，有一项，我用断点检查。我尝试通过添加标签来显示它，失败了。

[HttpPost]
public ActionResult AddCriteria(Search model)
{ 
   if (model == null) model = new Search();
   Criteria crit = new Criteria();
   crit.CriteriaType = model.CriteriaSelected;
   crit.TextToSearch = model.TextToSearch;
   model.CriteriaListToSearch.Add(crit);
   return View("Index", model);
}

调试：

还有另一种方法可以做到这一点吗？

Answer 1

What does your model look like? Razor may be calling ToString() in order to display your data.

Answer 2

如果列表中有项目并且CriteriaTypeandTextToSearch属性不为空或为空，那么这应该有效。还要确保没有隐藏 div 的某些 CSS 规则。您可以使用 FireBug 或 Chrome 开发人员工具栏检查您的 DOM，并分析应用于生成的 div 的所有 CSS 规则。