使用 Tag Helper 绑定复选框列表

Question

我正在尝试使用标签助手绑定复选框列表。问题是我的复选框列表总是 return false。如果我使用 request.form["Category"] 而不是标签助手，它就会起作用。我的问题在哪里。谢谢

型号：

public partial class Policy 
{
    public int Id { get; set; }
    public string Category { get; set; }
    [NotMapped]
    public List<PolicyCategory> Categories { get; set; }    
}
public class PolicyCategory
{
    [Key]
    public int Category_id { get; set; }
    public string Category_name { get; set; }
    [NotMapped]
    public bool Selected { get; set; }

}

控制器：

     [HttpPost]
            [ValidateAntiForgeryToken]
            public async Task<IActionResult> Create([Bind("Category")] Policy policy)
            {
                    var checkedString = string.Empty;
                    List<PolicyCategory> Categories = PopulateCategories();
                    for (int i = 0; i < Categories.Count(); i++)
                    {
                        if (Categories[i].Selected==true)
                        {
                            checkedString += Categories[i].Category_name + ",";
                        }
                    }
                    ...
                return View(policy);
            }

查看：

   

    for (int i=0; i<Model.Categories.Count(); i++)
            {
                <input  type="checkbox" asp-for="@Model.Categories[i].Selected" />
                <label asp- 
              for="@Model.Categories[i].Selected">@Model.Categories[i].Category_name</label>
                <input  type="hidden" asp-for="@Model.Categories[i].Category_id" />
                <input  type="hidden" asp-for="@Model.Categories[i].Category_name" />
                <br />
                }
            }

Answer 1

Model:
    public partial class Policy 
{
    public int Id { get; set; }
    public List<PolicyCategory> Category { get; set; }
    [NotMapped]
    public List<PolicyCategory> Categories { get; set; }    
}

View:

    for (int i=0; i<Model.Categories.Count(); i++)
            {
                <input  type="checkbox" asp-for="@Model.Categories[i].Selected" />
                <label asp-for="@Model.Categories[i].Selected">@Model.Categories[i].Category_name</label>
                <input  type="hidden" asp-for="@Model.Categories[i].Category_id" />
                <input  type="hidden" asp-for="@Model.Categories[i].Category_name" />
                <br />
                }
            }

使用 Tag Helper 绑定复选框列表

Bind Checkboxlist using Tag Helper

asp.net-core-mvc