string AddChannelTag() { //检查是否已经存在改标签 List <string> tagsList = ChannelHelper.GetTags(ObjectID); if (tagsList != null && tagsList.Contains(TagName)) { return("{\"success\":false,\"msg\":\"该标签已经存在!\"}"); } else { Channel a = ChannelHelper.GetChannelById(ObjectID); if (a != null) { //更新文章标签 a.Tags = a.Tags + "'" + TagName + "'"; try { ChannelHelper.UpdateChannel(a, new string[] { "Tags" }); //更新标签使用频率 TagsHelper.Add(TagName); } catch (Exception ex) { return("{\"success\":false,\"msg\":\"" + ex.Message + "\"}"); } //记录日志 AddLog("编辑文章", string.Format("为栏目【{0}】增加标签【{1}】", a.Title, TagName)); return("{\"success\":true,\"msg\":\"添加成功!\"}"); } return("{\"success\":false,\"msg\":\"文章已被删除!\"}"); } return(""); }