asp.net core tags 扩展之 id 和 name

asp.net core 页面 TagHelper  的 Id 和 Name 属性扩展 。

     [HtmlTargetElement(Attributes = "asp-name")]
     public class NameTagHelper : TagHelper
     {
         private const string NameAttributeName = "asp-name";

         [HtmlAttributeName(NameAttributeName)]
         public ModelExpression Name { get; set; }

         [ViewContext, HtmlAttributeNotBound]
         public ViewContext ViewContext { get; set; }

         private IHtmlGenerator _generator;

         public NameTagHelper(IHtmlGenerator generator)
         {
             this._generator = generator;

         }

         public override void Process(TagHelperContext context, TagHelperOutput output)
         {
             if (context == null)
             {
                 throw new ArgumentNullException(nameof(context));
             }
             if (output == null)
             {
                 throw new ArgumentNullException(nameof(output));
             }

             if (this.Name != null)
             {
                 if (this.Name.Metadata == null)
                 {
                     throw new ArgumentException(nameof(Name));
                 }

                 string value = NameAndIdProvider.GetFullHtmlFieldName(ViewContext, this.Name.Name);

                 output.Attributes.SetAttribute("name", value);
             }
         }
     }

     [HtmlTargetElement(Attributes = "asp-id")]
     public class IdTagHelper : TagHelper
     {
         private const string IdAttributeName = "asp-id";

         [HtmlAttributeName(IdAttributeName)]
         public ModelExpression Id { get; set; }

         [ViewContext, HtmlAttributeNotBound]
         public ViewContext ViewContext { get; set; }

         private IHtmlGenerator _generator;

         public IdTagHelper(IHtmlGenerator generator)
         {
             this._generator = generator;

         }

         public override void Process(TagHelperContext context, TagHelperOutput output)
         {
             if (context == null)
             {
                 throw new ArgumentNullException(nameof(context));
             }
             if (output == null)
             {
                 throw new ArgumentNullException(nameof(output));
             }

             if (this.Id != null)
             {
                 if (this.Id.Metadata == null)
                 {
                     throw new ArgumentException(nameof(Id));
                 }

                 string idFieldName = NameAndIdProvider.GetFullHtmlFieldName(ViewContext, this.Id.Name);
                 string idFieldValue = NameAndIdProvider.CreateSanitizedId(this.ViewContext, idFieldName, _generator.IdAttributeDotReplacement);

                 output.Attributes.SetAttribute("id", idFieldValue);
             }
         }
     }

原博客链接 ： https://blog.wuliping.cn/post/aspnet-core-taghelper-extensions-for-id-and-name