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Vikhrmodels
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programming_books_eng

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84
Using identity in the application
All done! Try using the application with two different user accounts. The
to-do items stay private for each account.
85
Authorization with roles
Authorization with roles
Roles are a common approach to handling authorization and permissions
in a web application. For example, it's common to create an
Administrator role that gives admin users more permissions or power
than normal users.
In this project, you'll add a Manage Users page that only administrators
can see. If normal users try to access it, they'll see an error.
Add a Manage Users page
First, create a new controller:
Controllers/ManageUsersController.cs
using System;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using AspNetCoreTodo.Models;
using Microsoft.EntityFrameworkCore;
namespace AspNetCoreTodo.Controllers
{
[Authorize(Roles = "Administrator")]
public class ManageUsersController : Controller
{
private readonly UserManager<ApplicationUser>
_userManager;
public ManageUsersController(
UserManager<ApplicationUser> userManager)
{
_userManager = userManager;
}
86
Authorization with roles
public async Task<IActionResult> Index()
{
var admins = (await _userManager
.GetUsersInRoleAsync("Administrator"))
.ToArray();
var everyone = await _userManager.Users
.ToArrayAsync();
var model = new ManageUsersViewModel
{
Administrators = admins,
Everyone = everyone
};