如何使用asp.net core 3.1/5MVC在剃刀视图中自动标记必填字段标签(基于[必需]注释)？

using Microsoft.AspNetCore.Mvc.TagHelpers;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.AspNetCore.Razor.TagHelpers;

namespace YourNamespace
{
    [HtmlTargetElement(Attributes = "required")]
    public class CustomTagHelper : TagHelper
    {
        private readonly IHtmlGenerator _generator;

        [HtmlAttributeName("for")]
        public ModelExpression For { get; set; }

        public CustomTagHelper(IHtmlGenerator generator)
        {
            _generator = generator;
        }

        public override void Process(TagHelperContext context, TagHelperOutput output)
        {
            var label = _generator.GenerateLabel(
                ViewContext,
                For.ModelExplorer,
                For.Name,
                labelText: null,
                htmlAttributes: null);

            label.Attributes.Add("class", "required");

            output.MergeAttributes(label);
            output.Content.SetHtmlContent(label.Content);
        }
    }
}

<label asp-for="FieldName" required></label>

@addTagHelper YourNamespace.CustomTagHelper, YourAssemblyName