Asp.net简单的输出json字符串

 public class model
    {
        public model()
        {
            Id = string.Empty;
            name = string.Empty;
            time = string.Empty;
            Status = string.Empty;
        }
        public string Id { get; set; }
        public string name { get; set; }
        public string time { get; set; }
        public string Status { get; set; }
    }

 string str = "";
            string sql = "select time,name,id from name order by time desc";
            DataTable dt = new DB.DB().RunSqlGetDataTable(sql);
            List<model> list = new List<model>();
            if (dt != null && dt.Rows.Count > 0)
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    model m = new model();
                    m.Id = dt.Rows[i]["id"].ToString();
                    m.name = dt.Rows[i]["name"].ToString();
                    m.time = dt.Rows[i]["time"].ToString();
                    list.Add(m);
                }
            }
            str = JsonConvert.SerializeObject(list);
            context.Response.Write(str);