自定义标签助手不起作用 [英] Custom tag helper not working

问题描述

我遵循了一些有关为ASP Core创建自定义标签帮助程序的指南.

I followed a few guides on creating a custom tag helper for ASP Core.

这是我的助手:

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

namespace ToolControlSystem.TagHelpers
{
    [HtmlTargetElement("description", Attributes = DescriptionAttributeName, TagStructure = TagStructure.NormalOrSelfClosing)]
    public class DescriptionTagHelper : TagHelper
    {
        private const string DescriptionAttributeName = "asp-for";


        [HtmlAttributeName(DescriptionAttributeName)]
        public ModelExpression Model { get; set; }

        public override void Process(TagHelperContext context, TagHelperOutput output)
        {
            base.Process(context, output);

            var description = GetDescription(Model.ModelExplorer);

            output.TagName = "span";
            output.TagMode = TagMode.StartTagAndEndTag;
            output.Content.SetContent(description);
        }

        private string GetDescription(ModelExplorer modelExplorer)
        {
            string description;
            description = modelExplorer.Metadata.Placeholder;

            if (String.IsNullOrWhiteSpace(description))
            {
                description = modelExplorer.Metadata.Description;
            }

            return description;
        }
    }
}

我将其放置在_ViewImports.cshtml中:@addTagHelper *, ToolConstrolSystem.TagHelpers

Annnndd ...没事.没有智能，没有标签替换...

Annnndd... nothing. No intellisense, no tag replacing...

有什么想法吗?

推荐答案

您只需要在视图导入文件中提供程序集名称.

You need to provide only assembly name in the view imports file.

_ViewImports.cshtml: 

@addTagHelper *, ToolConstrolSystem

这篇关于自定义标签助手不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！