public string GetCartInfo() { string account = HttpContext.Session.GetString("Account"); var cartModel = new CartModel(); string[][] c = cartModel.GetCartInfo(account); List <string> res = new List <string>(); foreach (string[] val in c) { Dictionary <string, string> row = new Dictionary <string, string>() { { "id", val[0] }, { "quan", val[1] } }; res.Add(JsonConvert.SerializeObject(row)); } return(JsonConvert.SerializeObject(res)); }