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：

引用“ IAuthorizeData”类型声明其定义于 'Microsoft.AspNetCore.Authorization'，但找不到

我正在使用TagHelperSamples.Authorization nuget包根据用户权限和角色来选择呈现HTML的一部分。

如果用户获得了如下所示的授权，我正在使用上述nuget软件包中的asp-authorize标签帮助程序来显示菜单：

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

这些标签帮助程序在构建项目时产生错误。

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

是否有任何有关解决此问题或任何变通办法的帮助/建议？

Answer 1

TagHelperSamples.Authorization尚不适合asp.net core 3.0，请参阅

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

您可以只删除该包，并在asp.net core 3.0项目中基于source code手动创建您的授权标签帮助程序类：

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

我已经更新了TagHelperSamples.Authorization程序包以支持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/

引用类型“ IAuthorizeData”声称它是在“ Microsoft.AspNetCore.Authorization”中定义的，但找不到

2 个答案: