Question

I have been learning .MVC recently and am having trouble understanding how to process a viewmodel when posted back. I have followed the example here: http://www.shawnmclean.com/blog/2011/04/asp-net-mvc-multiple-check-boxes-in-an-array-or-list/#codesyntax_2 My problem is how do we handle the viewmodel when posted back so that a user is save with the correct roles? Do I have to manually pull the values out of the viewmodel and assign the selected roles to the user?

All help appreciated!

James

Answer 1

Yes, you have to. This is the code from the your link handling that.
The Action receives the ViewModel object and calls a Method in some UserService which does the actual work:

[HttpPost]
public ActionResult EditUserRole(UserRoleViewModel model)
{
    List<Role> roles = model.Roles.Where(r => r.IsInRole)
            .Select(r => new Role {RoleId = r.RoleId, RoleName = r.RoleName})
            .ToList();
    userService.AddRolesToUser(model.UserId, roles);
    return View();
}