Creating Roles in Asp.net Identity MVC 5

Question

There is very little documentation about using the new Asp.net Identity Security Framework.

I have pieced together what I could to try and create a new Role and add a User to it. I tried the following: Add role in ASP.NET Identity

which looks like it may have gotten the info from this blog: building a simple to-do application with asp.net identity and associating users with to-does

I have added the code to a Database Initializer that is run whenever the model changes. It fails on the RoleExists function with the following error:

System.InvalidOperationException occurred in mscorlib.dll The entity type IdentityRole is not part of the model for the current context.

protected override void Seed (MyContext context)
{
    var UserManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(context)); 
    var RoleManager = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(context));

    // Create Admin Role
    string roleName = "Admins";
    IdentityResult roleResult;

    // Check to see if Role Exists, if not create it
    if (!RoleManager.RoleExists(roleName))
    {
        roleResult = RoleManager.Create(new IdentityRole(roleName));
    }
}

Any help is appreciated.

Answer 1

    public static void createUserRole(string roleName)
    {
        if (!System.Web.Security.Roles.RoleExists(roleName))
        {
            System.Web.Security.Roles.CreateRole(roleName);
        }
    }

Answer 2

Verify you have following signature of your MyContext class

public class MyContext : IdentityDbContext<MyUser>

Or

public class MyContext : IdentityDbContext

The code is working for me, without any modification!!!

Answer 3

As an improvement on Peters code above you can use this:

   var roleManager = new RoleManager<Microsoft.AspNet.Identity.EntityFramework.IdentityRole>(new RoleStore<IdentityRole>(new ApplicationDbContext()));

   if (!roleManager.RoleExists("Member"))
            roleManager.Create(new IdentityRole("Member"));

Answer 4

I wanted to share another solution for adding roles:

<h2>Create Role</h2>

@using (Html.BeginForm())
{
@Html.AntiForgeryToken()
@Html.ValidationSummary(true)
<span class="label label-primary">Role name:</span>
<p>
    @Html.TextBox("RoleName", null, new { @class = "form-control input-lg" })
</p>
<input type="submit" value="Save" class="btn btn-primary" />
}

Controller:

    [HttpGet]
    public ActionResult AdminView()
    {
        return View();
    }

    [HttpPost]
    public ActionResult AdminView(FormCollection collection)
    {
        var roleManager = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(new ApplicationDbContext()));

        if (roleManager.RoleExists(collection["RoleName"]) == false)
        {
            Guid guid = Guid.NewGuid();
            roleManager.Create(new IdentityRole() { Id = guid.ToString(), Name = collection["RoleName"] });
        }
        return View();
    }