自定义标签助手调试

我正在尝试测试我要创建的新标签助手.我偶然发现了新的.net核心验证的缺点，并且无法更改类后验证.因此，如果我想为错误提供红色背景，则跨度始终存在并且不会改变.因此，我决定制作自己的标签助手.问题是我似乎无法使其正常工作或触发.我什至无法达到断点.到目前为止，这是我需要的标签帮手.

I'm trying to test a new tag helper that I'm trying to create. I've stumbled into a shortcoming of the new .net core validation and cannot change the class post validation. So if I wanted to give my errors a red background, the span is always there and won't change. So, I've decided to make my own tag helper. the problem is I can't seem to get it to work or trigger. I can't even get it to hit a break point. Here is what I have for a tag helper so far.

namespace MusicianProject.TagHelpers
{
    // You may need to install the Microsoft.AspNetCore.Razor.Runtime package into your project
    [HtmlTargetElement("invalid-class",  Attributes = "validation-class")]
    public class ValidateClassTagHelper : TagHelper
    {
        public ValidateClassTagHelper(IHtmlGenerator generator) 
        {

        }
        public override Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
        {


            return base.ProcessAsync(context, output);
        }


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

            output.Attributes.Add("class", "test");
            var attr = context.AllAttributes;


        }
    }
}

这是我的注册视图中的用法.

and here is the usage in my register view.

<div class="container">

    <form asp-controller="Account" asp-action="Register" method="post">

        <div class="col-md-4 col-md-offset-4">

            <div class="form-group">
                <label asp-for="FirstName"></label>
                <input class="form-control" type="text" asp-for="FirstName" />
                <span asp-validation-for="FirstName" class="text-danger"></span>
            </div>

            <div class="form-group">
                <label asp-for="LastName"></label>
                <input class="form-control" asp-for="LastName" />
                <span asp-validation-for="LastName" class="text-danger"></span>
            </div>

            <div class="form-group">
                <label asp-for="Email"></label>
                <input class="form-control" type="text" asp-for="Email" />
                <span validation-class="alert alert-danger" invalid-class="test" asp-validation-for="Email" class="text-danger"></span>
            </div>

            <div class="form-group">
                <label asp-for="Password"></label>
                <input asp-for="Password" type="password" id="password" class="form-control" />
                <span asp-validation-for="Password" class="text-danger"></span>
            </div>

            <div class="form-group">
                <label asp-for="ConfirmPassword"></label>
                <input asp-for="ConfirmPassword" type="password" id="confirm-password" class="form-control" />
                <span asp-validation-for="ConfirmPassword" class="text-danger"></span>
            </div>


            <div class="btn-group text-center">
                <button class="btn btn-default">Sign up!</button>
                <button class="btn btn-danger">Cancel</button>
            </div>
        </div>

    </form>
</div>

@section Scripts {
    @{ await Html.RenderPartialAsync("_ValidationScriptsPartial"); }
}

是的，我已经在_ViewImports.cshtml文件中注册了项目程序集名称.

And yes I have register in my _ViewImports.cshtml file, the projects assembly name.

@using MusicianProject
@using MusicianProject.Models
@addTagHelper "*, Microsoft.AspNetCore.Mvc.TagHelpers"
@addTagHelper "*, MusicianProject"

现在，我不确定某些文件的放置是否重要，但是_ViewImports.cshtml文件位于我的views文件夹根目录(src/Views/_ViewImports.cshtml)中，而我的标签助手在根目录中有自己的文件夹(src/TagHelpers/*).

Now I'm not sure if placement of certain files matters, but my _ViewImports.cshtml file is located within my views folder root (src/Views/_ViewImports.cshtml), and my tag helpers have their own folder in the root (src/TagHelpers/*).

我错过了什么，我该如何纠正?

What did I miss and how can I correct it?