/// <summary>
        /// 创建关键词
        /// kenneth-2017.6.15
        /// </summary>
        /// <param name="id"></param>
        /// <param name="keyword"></param>
        /// <param name="flag">true编辑false添加</param>
        public void AddKeyword(int id, string keyword, bool flag)
        {
            if (!string.IsNullOrWhiteSpace(keyword))//关键词不为空的时候添加到关键词库中
            {
                if (flag)
                {
                    KeywordBiz.Instance.Del(id);
                }
                string[] kw = keyword.Split(',');
                for (int i = 0; i < kw.Length; i++)
                {
                    if (!string.IsNullOrWhiteSpace(kw[i]))
                    {
                        KeywordModel kmodel = new KeywordModel();
                        kmodel.NoId = id;
                        kmodel.KeywordName = kw[i];
                        KeywordBiz.Instance.Add(kmodel);
                    }
                }
            }
        }