在 Razor Pages 中绑定单选按钮组时出现问题

Problems binding a radio button group in Razor Pages

我在 ASP.NET Core 3.0 Razor 页面中使用单选按钮组时遇到一些麻烦。本质上,我想使用无线电组而不是 select,但我不知道如何将它正确绑定到我的 InputModel。

Code 用于有问题的 Razor 页面。当然还有 repo 中的其余代码。

在我的 cshtml.cs 中,我有一个像这样定义的输入模型

public class InputModel
{
    [Required]
    [StringLength(
        CTConfig.Story.MaxTitleLength,
        ErrorMessage = "The {0} must be at least {2} and at max {1} characters long.",
        MinimumLength = CTConfig.Story.MinTitleLength
    )]
    public string Title { get; set; }
    [Required]
    [StringLength(
        CTConfig.Story.MaxDescriptionLength,
        ErrorMessage = "The {0} must be at least {2} and at max {1} characters long.",
        MinimumLength = CTConfig.Story.MinDescriptionLength
    )]
    public string Description { get; set; }
    [Required]
    [StringLength(
        CTConfig.Story.MaxHookLength,
        ErrorMessage = "The {0} must be at least {2} and at max {1} characters long.",
        MinimumLength = CTConfig.Story.MinHookLength
    )]
    public string Hook { get; set; }
    [DataType(DataType.Upload)]
    [MaxFileSize(CTConfig.Story.CoverMaxWeight)]
    [AllowedExtensions(new[] {".jpg", ".jpeg", ".png"})]
    public IFormFile Cover { get; set; }
    [Required] 
    public Rating Rating { get; set; }
    [Required] 
    public List<Tag> Tags { get; set; }
}

.cshtml 文件中的单选按钮组如下所示:

<div class="form-group">
    <label>Rating</label>
    <p>The age rating</p>

    @foreach (var rating in Model.Ratings)
    {
        <div class="form-check">
            <input asp-for="Input.Rating" class="form-check-input" type="radio" id="@rating.Name.ToLower()" value="@rating.Id" checked>
            <label class="form-check-label" for="@rating.Name.ToLower()">@rating.Name</label>
        </div>
    }
    <span asp-validation-for="Input.Rating" class="text-warning"></span>   
</div>

并且请求在发送表单时看起来也是 correct

但是如果我把错误写出来

foreach (var msv in ModelState.Values)
{
    foreach (var error in msv.Errors)
    {
        Console.WriteLine(error.ErrorMessage);
    }
}

我收到错误

The Rating field is required.

写到控制台。

InputModel 中使用 int Rating 而不是完整的 Rating Rating 似乎已经解决了问题。