Hi guys

I am working on a memberlist. The list works fine. I now need to add some filtering. I have a dropdown where I get all the membergroups. I now want to add the membergroup as a css class on each member. My code looks like this:

@inherits Umbraco.Web.Macros.PartialViewMacroPage

@using Umbraco.Core;
@using Umbraco.Core.Models;
@using Umbraco.Core.Services;

@{
  var memberservice = ApplicationContext.Current.Services.MemberService;
}
@* -- Bruger JS plugin fra listjs.com til at filtrere -- *@
<div id="users">
  <input class="search" placeholder="@Umbraco.Field("#Søg efter medarbejder")" />
  <select>
    <option>Vælg en afdeling</option>
    @foreach (var memGroup in Roles.GetAllRoles())
    {
      <option>@memGroup.ToString()</option>
    }
  </select>
  <div class="medarbejdereTH">
    <span><strong>Navn</strong></span>
    <span><strong>Lokal</strong></span>
    <span><strong>Lokal mobil</strong></span>
    <span><strong>Mobil</strong></span>
    <span><strong>Mail</strong></span>
  </div>
  <div class="list medarbejdere">
    @foreach (Member mem in memberservice.GetAllMembers().OrderBy(n => n.Name))
    {
      <div class="">
        <span class="name">@mem.Name</span>
        <span class="lokal">@mem.GetValue("lokal")</span>
        <span class="lokalM">@mem.GetValue("lokalMobil")</span>
        <span class="mobil">@mem.GetValue("medarbejderMobil")</span>
        <span class="mail"><a href="mailto:@mem.Email">@mem.Email</a></span>
      </div>
    }
  </div>
</div>

I have been looking at http://our.umbraco.org/documentation/Reference/Management-v6/Services/MemberService

But I can't figure out what to use.

How do I go about doing that?

/Michael