If it is MVC, follow below things
In view, add below statement
@Html.DropDownListFor(q => q.Filter.Status, Model.ListOfStatuses)
In service layer add below method
public IEnumerable<system.web.mvc.selectlistitem> GetStatuses()
{
yield return new System.Web.Mvc.SelectListItem() { Value = "", Text = "All", Selected = true };
yield return new System.Web.Mvc.SelectListItem() { Value = "A", Text = "Active", Selected = false };
yield return new System.Web.Mvc.SelectListItem() { Value = "I", Text = "Inactive", Selected = false };
}</system.web.mvc.selectlistitem>
and call this
model.ListOfStatuses = GetStatuses();
Hope this helps