Get current user in a TagHelper
asp.net-core, c#
Solution
Add an `IActionContextAccessor` parameter to your constructor. You can then get the HttpContext and its associated user with:
var user = actionAccessor.ActionContext.HttpContext.User;
var uid = _userManager.GetUserId(user);
You will also need to register the `IActionContextAccessor` in your ConfigureServices method of the Startup class:
services.AddSingleton<IActionContextAccessor, ActionContextAccessor>();
Problem
In a C# (ASP.NET Core) project, after login, the site must list a menu with a submenu according with permissions of the user. This menu appear in all sites. Basically is a dashboard menu. The content of this menu (submenus) are dynamically, according with user's permission. So, I think in creating a TagHelper class, that get the current logged user, get the content that this user has permission, and create the content of submenu (somes `<ul>` and `<li>`). I don't know if this is the best approach. I accept suggestions. But, if this approach is OK to use, how I can get the current logged user on a TagHelper class? I don't have a `HttpContext` on this class, only a `TagHelperContext`. TagHelper: ``` public class UserContentTagHelper : TagHelper { private readonly UserManager<ApplicationUser> _userManager; public UserContentTagHelper(UserManager<ApplicationUser> userManager) { _userManager = userManager; } public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output) { output.TagMode == TagMode.SelfClosing; // Error. HttpContext.User not avaliable var uid = _userManager.GetUserId(HttpContext.User); } } ``` Normally to get the currently logged user, I use `HttpContext.User`, but this is avaliable only on Controller class. Thanks!