Finding Roles MVC 4 Simple Membership - asp.net-mvc

Question

My Action
[Authorize(Roles = "Admin")]
public ActionResult Index()
{
using (var ctx = new _dbContext())
{
return View(ctx.UserProfiles.OrderBy(x => x.UserId).ToList());
}
}
I want to display roles with UserId and UserName how can i do that??
Update:
View Model
public class AccountIndexViewModel
{
public int UserId { get; set; }
public string UserName { get; set; }
public string Roles { get; set; }
}
View
#using GoldCalculator.Models
#model IEnumerable<AccountIndexViewModel>
#foreach (var user in Model)
{
<tr>
<td>#user.UserId</td>
<td>#user.UserName</td>
<td>#user.Roles</td>
<td> #Html.ActionLink("X", "Delete", new { id = #user.UserName }, new { #class = "deletebtn"})</td>
</tr>
}
The output is System.String[]

Answer 1

Assuming you have enabled roles in your application and that you have already created some roles:
using WebMatrix.WebData;
///blah blah blah...
///inside some action:
var roles = (SimpleRoleProvider)Roles.Provider;
var allRoles = roles.GetAllRoles();
Getting role for specific user:
var userRoles = roles.GetRolesForUser("admin#user.com");
Answering you new question, try this:
var model = ctx.UserProfiles.OrderBy(x => x.UserId);
var newModel = from ab in model
select new
{
UserName = ab.UserName,
UserId = ab.UserId,
Role = roles.GetRolesForUser(ab.UserName)
};
You are assigning value to variable that already has been declared and apparently data types don't match.