private static void SaveBanners(EditGroup editGroup, int groupID)
        {
            var curList = GroupBanners.GetByGroupID(groupID);

            foreach (var banner in editGroup.Banners)
            {
                if (!curList.Any(item => item.ID == banner.ID))
                {
                    var groupBanner = Mapper.Map <GroupBanner>(banner);

                    groupBanner.GroupID = groupID;

                    GroupBanners.Insert(groupBanner);
                }
                else
                {
                    GroupBanners.UpdateGroupBannerType(banner.ID, banner.GroupBannerType);
                    curList.Remove(curList.Single(cls => cls.ID == banner.ID));
                }
            }

            foreach (var item in curList)
            {
                GroupBanners.Delete(item.ID);
            }
        }
        public ActionResult Edit(int?id)
        {
            EditGroup group;

            if (id.HasValue)
            {
                group         = Mapper.Map <EditGroup>(Groups.GetByID(id.Value));
                group.Banners = GroupBanners.GetByGroupID(group.ID);
            }
            else
            {
                group = new EditGroup();
            }

            return(View("/Areas/Admin/Views/Groups/Edit.cshtml", group));
        }