CODEWITHSUNDEEP
c#asp.net-core
Roberto Correia
Roberto Correia

Reputation: 1726

Get current user in a TagHelper

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!

Upvotes: 3

Views: 1031

Answers (1)

Daniel J.G.
Daniel J.G.

Reputation: 34992

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>();

Upvotes: 8

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