Get list of roles in asp.net core

we will discuss how to retrieve and display all roles in asp.net core using the Identity API.

We want to display 

• Role ID
• Role Name and 
• A pair of buttons to Edit and Delete a role

Roles property of RoleManager class

• Roles property of RoleManager class returns the list of all IdentityRole objects
• Pass the list of IdentityRole objects to the view for display

[HttpGet]
public IActionResult ListRoles()
{
    var roles = roleManager.Roles;
    return View(roles);
}

Here is the complete controller code

using Microsoft.AspNetCore.Identity;

using Microsoft.AspNetCore.Mvc;

namespace EmployeeManagement.Controllers

{

    public class AdministrationController : Controller

    {

        private readonly RoleManager<IdentityRole> roleManager;

        public AdministrationController(RoleManager<IdentityRole> roleManager)

        {

            this.roleManager = roleManager;

        }

        [HttpGet]

        public IActionResult ListRoles()

        {

            var roles = roleManager.Roles;

            return View(roles);

        }

        // Rest of the code

    }

}

List Roles View 

• ID property of the IdentityRole object returns the role ID
• Name property of the IdentityRole object returns the role Name
• We are using Bootstrap 4 cards for styling the list of roles

@model IEnumerable<IdentityRole>

@{

    ViewBag.Title = "All Roles";

}

<h1>All Roles</h1>

@if (Model.Any())

{

    <a class="btn btn-primary mb-3" style="width:auto" asp-action="CreateRole"

       asp-controller="administration">Add new role</a>

    foreach (var role in Model)

    {

        <div class="card mb-3">

            <div class="card-header">

                Role Id : @role.Id

            </div>

            <div class="card-body">

                <h5 class="card-title">@role.Name</h5>

            </div>

            <div class="card-footer">

                <a href="#" class="btn btn-primary">Edit</a>

                <a href="#" class="btn btn-danger">Delete</a>

            </div>

        </div>

    }

}

else

{

    <div class="card">

        <div class="card-header">

            No roles created yet

        </div>

        <div class="card-body">

            <h5 class="card-title">

                Use the button below to create a role

            </h5>

            <a class="btn btn-primary" style="width:auto"

               asp-controller="administration" asp-action="CreateRole">

                Create Role

            </a>

        </div>

    </div>

}