ASP.NET 核心:标签助手 "select" 为空

ASP.NET Core : Tag helper "select" is empty

我需要一个包含 select 元素的视图。我有以下虚拟机 class:

public class EditTicketVM
{
    public EditTicketVM()
    {
        Statuses = new SelectList(new List<SelectListItem>{
            new SelectListItem("Open", "open"),
            new SelectListItem("Pending", "pending"),
            new SelectListItem("Hold", "hold"),
            new SelectListItem("Solved", "solved"),
            new SelectListItem("Closed", "closed"),
        });

    }

    public string Description { get; set; }
    public string Subject { get; set; }
    public string Status { get; set; }

    public SelectList Statuses { get; set; }
}
页面上的

和 select 元素:

<select asp-for="Status" class="form-control" asp-items="Model.Statuses" />

但是在结果页面上这个元素是空的:

我的代码有什么不正确的地方?

我已经在我这边测试了你的代码。问题出在您的 select 标签中。您正在使用自闭 select 标签。这是行不通的。按如下方式编写您的 select 标签:

<select asp-for="Status" class="form-control" asp-items="Model.Statuses">
   <option value="">Select Status</option>
</select>

您的 SelectList 初始化也有问题。您初始化 SelectList 的方式将不起作用。按如下方式初始化您的 SelectList

public EditTicketVM()
{
   Statuses = new SelectList(new List<SelectListItem> {
       new SelectListItem(){Text = "Open", Value = "open"},
       new SelectListItem(){Text = "Pending", Value = "pending"},
       new SelectListItem(){Text = "Hold", Value = "hold"},
       new SelectListItem(){Text = "Solved", Value = "solved"},
       new SelectListItem(){Text = "Closed", Value = "closed"},
    },"Value","Text");
}