MVC 3: Passing IEnumerable Model to Controller using HttpPost

[erickwidya]

i can pass IEnumerable Model to View in Controller but when user edit in, how to get those value back using HttpPost because it contains IEnumerable??

currently i'm using this to passing the Model

public class UserRoleModel
	{
		public string Username { get; set; }

		[Display(Name = "User is in Role")]
		public bool UsersInrole { get; set; }
	}

public ActionResult UsersRole(string roleName)
		{
			string[] usersInRole = Roles.GetUsersInRole(roleName);
			MembershipUserCollection user =  Membership.GetAllUsers();

			List<UserRoleModel> list = new List<UserRoleModel>();
						
			foreach (MembershipUser item in user)
			{
				UserRoleModel model = new UserRoleModel();
				model.Username = item.UserName;

				if (usersInRole.Contains(item.UserName))
				{
					model.UsersInrole = true;	
				}
				else
				{
					model.UsersInrole = false;	
				}
				
				list.Add(model);
			}

			return View(list);
		}

my cshtml looks like this

@model IEnumerable<TopTech.Models.UserRoleModel>
@{
	ViewBag.Title = "UsersRole";
}
<h2>
	UsersRole</h2>
<p>
	@Html.ActionLink("Create New", "Create")
</p>
@using (Html.BeginForm())
{

	<table>
		<tr>
			<th>
				Username
			</th>
			<th>
				User in Role
			</th>
			<th>
			</th>
		</tr>
		@foreach (var item in Model)
  {
			<tr>
				<td>
					@Html.DisplayFor(modelItem => item.Username)
				</td>
				<td>
					@Html.EditorFor(modelItem => item.UsersInrole)
				</td>
			</tr>
  }
	</table>
	<input type="submit" value="Submit" /> 		
}

when it press Submit, the Model that passing contains null or empty..why? how to passed it??
the code looks like this

	[HttpPost]
		public ActionResult UsersRole(List<UserRoleModel> model)
		{
			return View();
		}

basically i want user to be able to check or uncheck Checkbox then make the value available when POST it

thx,
erick