string contor = ConfigurationManager.ConnectionStrings["sql"].ConnectionString; //

        private VideoLiveInfo SetRow(SqlDataReader rd)   //获取一行的数据
        {

            VideoLiveInfo row = new VideoLiveInfo();
            row.Id = rd["id"].ToString();
            row.LiveVideoUrl = rd["live_video_url"].ToString();
           
            return row;   
        
        } 
        //查询id最大的一条数据
        public VideoLiveInfo FindMaxVideo()
        {

            string sql = "select * from dbo.VideoLive where id = (select MAX(id) from VideoLive)";
            VideoLiveInfo vli = new VideoLiveInfo();
            using (SqlDataReader rd = SqlHelper.ExecuteReader(contor, CommandType.Text, sql, null))
            {
                if (rd.Read())
                {
                    vli = SetRow(rd);
                }
                return vli;
            }

        }