对类型 'IAuthorizeData' 的引用声称它在 'Microsoft.AspNetCore.Authorization' 中定义，但找不到

Question

我有一个 Asp.Net Core 2.2 应用程序。当我迁移到 Asp.Net Core 3.0 时，出现以下错误：

Reference to type 'IAuthorizeData' claims it is defined in 'Microsoft.AspNetCore.Authorization', but it could not be found

我正在使用 TagHelperSamples.Authorization nuget 包根据用户权限和角色选择性地呈现 HTML 的一部分。

如果用户获得授权，我将使用上述 nuget 包中的 asp-authorize 标签助手来显示菜单，如下所示：

<div asp-authorize class="collapse navbar-collapse" id="navbarCollapse">

这些标签助手在构建项目时造成错误。

我尝试在 _ViewImports.cshtml 中添加 @using Microsoft.AspNetCore.Authorization 但这不起作用。

关于如何解决此问题或任何解决方法的任何 helps/suggestions？

Answer 1

TagHelperSamples.Authorization还不适合asp.net core 3.0，参考

https://github.com/dpaquette/TagHelperSamples/issues/77

您可以删除包并根据 asp.net 核心 3.0 项目中的 source code 手动创建您的授权标签助手 class：

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Authorization.Policy;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Razor.TagHelpers;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace Asp3identityCore.TagHelpers
{
    [HtmlTargetElement(Attributes = "asp-authorize")]
    [HtmlTargetElement(Attributes = "asp-authorize,asp-policy")]
    [HtmlTargetElement(Attributes = "asp-authorize,asp-roles")]
    [HtmlTargetElement(Attributes = "asp-authorize,asp-authentication-schemes")]
    public class AuthorizationPolicyTagHelper : TagHelper, IAuthorizeData
    {
        private readonly IAuthorizationPolicyProvider _policyProvider;
        private readonly IPolicyEvaluator _policyEvaluator;
        private readonly IHttpContextAccessor _httpContextAccessor;

        public AuthorizationPolicyTagHelper(IHttpContextAccessor httpContextAccessor, IAuthorizationPolicyProvider policyProvider, IPolicyEvaluator policyEvaluator)
        {
            _httpContextAccessor = httpContextAccessor;
            _policyProvider = policyProvider;
            _policyEvaluator = policyEvaluator;
        }

        /// <summary>
        /// Gets or sets the policy name that determines access to the HTML block.
        /// </summary>
        [HtmlAttributeName("asp-policy")]
        public string Policy { get; set; }

        /// <summary>
        /// Gets or sets a comma delimited list of roles that are allowed to access the HTML  block.
        /// </summary>
        [HtmlAttributeName("asp-roles")]
        public string Roles { get; set; }

        /// <summary>
        /// Gets or sets a comma delimited list of schemes from which user information is constructed.
        /// </summary>
        [HtmlAttributeName("asp-authentication-schemes")]
        public string AuthenticationSchemes { get; set; }

        public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
        {
            var policy = await AuthorizationPolicy.CombineAsync(_policyProvider, new[] { this });

            var authenticateResult = await _policyEvaluator.AuthenticateAsync(policy, _httpContextAccessor.HttpContext);

            var authorizeResult = await _policyEvaluator.AuthorizeAsync(policy, authenticateResult, _httpContextAccessor.HttpContext, null);

            if (!authorizeResult.Succeeded)
            {
                output.SuppressOutput();
            }
        }
    }
}

Answer 2

我更新了 TagHelperSamples.Authorization 包以支持 ASP.NET Core 3.0。升级到最新的软件包版本将解决您的问题：https://www.nuget.org/packages/TagHelperSamples.Authorization/