我正在寻找此
的变体@if (SignInManager.IsSignedIn(User) && User.IsInRole(Roles.Administrator))
{
<div id="editArticle">
但不是在角色之后检查,而是在检查策略之后,就像在控制器中执行此操作一样。
[Authorize(Policy = Policies.RequireAdmin)]
答案 0 :(得分:15)
这与问题here
类似我发现此链接可能会有所帮助:https://docs.asp.net/en/latest/security/authorization/views.html
该页面的示例:
@if (await AuthorizationService.AuthorizeAsync(User, "PolicyName"))
{
<p>This paragraph is displayed because you fulfilled PolicyName.</p>
}
在某些情况下,资源将是您的视图模型,您可以调用 AuthorizeAsync与您在检查期间完全相同 基于资源的授权;
@if (await AuthorizationService.AuthorizeAsync(User, Model, Operations.Edit))
{
<p><a class="btn btn-default" role="button"
href="@Url.Action("Edit", "Document", new {id= Model.Id})">Edit</a></p>
}
答案 1 :(得分:8)
使用Dot net core 2.0 AuthorizationService.AuthorizeAsync不再返回布尔值,它返回AuthorizationResult。 dot net core 2.0的工作版本将是这样的:
@using Microsoft.AspNetCore.Authorization
@inject IAuthorizationService AuthorizationService
@if ((await AuthorizationService.AuthorizeAsync(User, "RequireAuthenticatedUser")).Succeeded)
{
<li><a asp-area="" asp-controller="Roles" asp-action="Index">Roles</a></li>
}
答案 2 :(得分:4)
因此,完整视图包含:
@using Microsoft.AspNetCore.Authorization
@inject IAuthorizationService AuthorizationService
// Your HTML elements and i.e.:
@if (await AuthorizationService.AuthorizeAsync(User, "RequireAuthenticatedUser"))
{
<li><a asp-area="" asp-controller="Roles" asp-action="Index">Roles</a></li>
}
答案 3 :(得分:1)
现在在大多数情况下最好使用 TagHelpers 处理。 你可以像这样使用它:
<li policy="@MyGroups.Administrators">
....
所以不再是 Magicstrings :-)
见:https://www.davepaquette.com/archive/2017/11/05/authorize-tag-helper.aspx
答案 4 :(得分:0)
更简洁地说:
@inject Microsoft.AspNetCore.Authorization.IAuthorizationService authorizationService
@if (await authorizationService.AuthorizeAsync(User, null, "RequireAuthenticatedUser"))
{
<li><a asp-area="" asp-controller="Roles" asp-action="Index">Roles</a></li>
}
看起来AuthorizeAsync()
需要资源参数,但是可以像我的例子一样传递null。
答案 5 :(得分:0)
如果您要在许多视图中使用它,那么您最好实现自定义 RazorPage :
public abstract class MyRazorPage<T> : RazorPage<T>
{
public async Task<bool> HasPolicyAsync(string policyName)
{
var authorizationService = Context.RequestServices.GetService(typeof(IAuthorizationService)) as IAuthorizationService;
bool isAdmin = (await authorizationService.AuthorizeAsync(User, policyName)).Succeeded;
return isAdmin;
}
}
然后打开 _ViewImports.cshtml 并添加下一条指令:
@inherits MyRazorPage<TModel>
现在您可以从任何视图调用 HasPolicyAsync()方法:
if (await HasPolicyAsync(Policies.RequireAdmin))
{
<h2>Admin is authorized</h2>
}
看起来会更简洁。