CODEWITHSUNDEEP
c#asp.net-core-identityasp.net-core-3.1
Stian
Stian

Reputation: 1602

How can I remove/add a role from/to a user?

This is how I want it to work. How does it work?

userManager.RemoveRole(oldAdminUser, "GroupAdmin");
userManager.RemoveRole(newAdminUser, "GroupUser");
userManager.AddRole(oldAdminUser, "GroupUser");
userManager.AddRole(newAdminUser, "GroupAdmin");

In the fantasy example above, two users swap roles. The old admin becomes a user, and the old user becomes the admin.

Upvotes: 0

Views: 202

Answers (2)

Mateech
Mateech

Reputation: 1064

In the Role Controller class, You have to add a dependency of RoleManager class to the Constructor.

The RoleManager class is used to manage the Roles in Identity, and has the some important functions and properties. The role is an object of type IdentityRole.

Example of creating and deleting roles:

        [HttpPost]
        public async Task<IActionResult> Create([Required]string name)
        {
            if (ModelState.IsValid)
            {
                IdentityResult result = await roleManager.CreateAsync(new IdentityRole(name));
                if (result.Succeeded)
                    return RedirectToAction("Index");
                else
                    Errors(result);
            }
            return View(name);
        }

        [HttpPost]
        public async Task<IActionResult> Delete(string id)
        {
            IdentityRole role = await roleManager.FindByIdAsync(id);
            if (role != null)
            {
                IdentityResult result = await roleManager.DeleteAsync(role);
                if (result.Succeeded)
                    return RedirectToAction("Index");
                else
                    Errors(result);
            }
            else
                ModelState.AddModelError("", "No role found");
            return View("Index", roleManager.Roles);
        }

Then you can use the following members of the UserManager class to play with the roles:

userManager.AddToRoleAsync(AppUser user, string name)

userManager.RemoveFromRoleAsync(AppUser user, string name)

etc.

You can read full arcticle here

Upvotes: 0

Hadi Samadzad
Hadi Samadzad

Reputation: 1540

Try this:

await userManager.RemoveFromRoleAsync(oldAdminUser, "GroupAdmin");
await userManager.RemoveFromRoleAsync(newAdminUser, "GroupUser");
await userManager.AddToRoleAsync(oldAdminUser, "GroupUser");
await userManager.AddToRoleAsync(newAdminUser, "GroupAdmin");

Upvotes: 1

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