public ActionResult _ListUsersTags(string spaceKey)
        {
            //取所有用户标签
            TagService tagService = new TagService(TenantTypeIds.Instance().User());
            IDictionary<TagGroup, List<string>> tagsInGroupDict = new Dictionary<TagGroup, List<string>>();
            IEnumerable<TagGroup> tagGroups = tagService.GetGroups();
            if (tagGroups != null)
            {
                foreach (TagGroup tagGroup in tagGroups)
                {
                    tagsInGroupDict[tagGroup] = tagService.GetTopTagsOfGroup(tagGroup.GroupId, 20).ToList();
                }
            }

            int count = userProfileSettings.MaxPersonTag;
            if (tagGroups != null)
                ViewData["tagGroupsCount"] = tagGroups.ToList().Count;

            ViewData["count"] = count;
            return View(tagsInGroupDict);
        }